17c478bd9Sstevel@tonic-gate /* 27c478bd9Sstevel@tonic-gate * CDDL HEADER START 37c478bd9Sstevel@tonic-gate * 47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5ae115bc7Smrj * Common Development and Distribution License (the "License"). 6ae115bc7Smrj * You may not use this file except in compliance with the License. 77c478bd9Sstevel@tonic-gate * 87c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 97c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 107c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 117c478bd9Sstevel@tonic-gate * and limitations under the License. 127c478bd9Sstevel@tonic-gate * 137c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 147c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 157c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 167c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 177c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 187c478bd9Sstevel@tonic-gate * 197c478bd9Sstevel@tonic-gate * CDDL HEADER END 207c478bd9Sstevel@tonic-gate */ 21342440ecSPrasad Singamsetty 227c478bd9Sstevel@tonic-gate /* 23*86f21945SDave Plauger * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved. 247c478bd9Sstevel@tonic-gate */ 257c478bd9Sstevel@tonic-gate 267c478bd9Sstevel@tonic-gate #include <sys/types.h> 277c478bd9Sstevel@tonic-gate #include <sys/param.h> 287c478bd9Sstevel@tonic-gate #include <sys/systm.h> 297c478bd9Sstevel@tonic-gate #include <sys/vm.h> 307c478bd9Sstevel@tonic-gate #include <sys/proc.h> 317c478bd9Sstevel@tonic-gate #include <sys/file.h> 327c478bd9Sstevel@tonic-gate #include <sys/conf.h> 337c478bd9Sstevel@tonic-gate #include <sys/kmem.h> 347c478bd9Sstevel@tonic-gate #include <sys/mem.h> 357c478bd9Sstevel@tonic-gate #include <sys/mman.h> 367c478bd9Sstevel@tonic-gate #include <sys/vnode.h> 377c478bd9Sstevel@tonic-gate #include <sys/errno.h> 387c478bd9Sstevel@tonic-gate #include <sys/memlist.h> 397c478bd9Sstevel@tonic-gate #include <sys/dumphdr.h> 407c478bd9Sstevel@tonic-gate #include <sys/dumpadm.h> 417c478bd9Sstevel@tonic-gate #include <sys/ksyms.h> 427c478bd9Sstevel@tonic-gate #include <sys/compress.h> 437c478bd9Sstevel@tonic-gate #include <sys/stream.h> 447c478bd9Sstevel@tonic-gate #include <sys/strsun.h> 457c478bd9Sstevel@tonic-gate #include <sys/cmn_err.h> 467c478bd9Sstevel@tonic-gate #include <sys/bitmap.h> 477c478bd9Sstevel@tonic-gate #include <sys/modctl.h> 487c478bd9Sstevel@tonic-gate #include <sys/utsname.h> 497c478bd9Sstevel@tonic-gate #include <sys/systeminfo.h> 507c478bd9Sstevel@tonic-gate #include <sys/vmem.h> 517c478bd9Sstevel@tonic-gate #include <sys/log.h> 527c478bd9Sstevel@tonic-gate #include <sys/var.h> 537c478bd9Sstevel@tonic-gate #include <sys/debug.h> 547c478bd9Sstevel@tonic-gate #include <sys/sunddi.h> 557c478bd9Sstevel@tonic-gate #include <fs/fs_subr.h> 567c478bd9Sstevel@tonic-gate #include <sys/fs/snode.h> 577c478bd9Sstevel@tonic-gate #include <sys/ontrap.h> 587c478bd9Sstevel@tonic-gate #include <sys/panic.h> 597c478bd9Sstevel@tonic-gate #include <sys/dkio.h> 607c478bd9Sstevel@tonic-gate #include <sys/vtoc.h> 617c478bd9Sstevel@tonic-gate #include <sys/errorq.h> 627c478bd9Sstevel@tonic-gate #include <sys/fm/util.h> 63e7cbe64fSgw #include <sys/fs/zfs.h> 647c478bd9Sstevel@tonic-gate 657c478bd9Sstevel@tonic-gate #include <vm/hat.h> 667c478bd9Sstevel@tonic-gate #include <vm/as.h> 677c478bd9Sstevel@tonic-gate #include <vm/page.h> 68ca3e8d88SDave Plauger #include <vm/pvn.h> 697c478bd9Sstevel@tonic-gate #include <vm/seg.h> 707c478bd9Sstevel@tonic-gate #include <vm/seg_kmem.h> 71d3d50737SRafael Vanoni #include <sys/clock_impl.h> 72b280b2a3SStuart Maybee #include <sys/hold_page.h> 737c478bd9Sstevel@tonic-gate 74ca3e8d88SDave Plauger #include <bzip2/bzlib.h> 75ca3e8d88SDave Plauger 76ca3e8d88SDave Plauger /* 77ca3e8d88SDave Plauger * Crash dump time is dominated by disk write time. To reduce this, 78ca3e8d88SDave Plauger * the stronger compression method bzip2 is applied to reduce the dump 79ca3e8d88SDave Plauger * size and hence reduce I/O time. However, bzip2 is much more 80ca3e8d88SDave Plauger * computationally expensive than the existing lzjb algorithm, so to 81ca3e8d88SDave Plauger * avoid increasing compression time, CPUs that are otherwise idle 82ca3e8d88SDave Plauger * during panic are employed to parallelize the compression task. 83ca3e8d88SDave Plauger * Many helper CPUs are needed to prevent bzip2 from being a 84ca3e8d88SDave Plauger * bottleneck, and on systems with too few CPUs, the lzjb algorithm is 85ca3e8d88SDave Plauger * parallelized instead. Lastly, I/O and compression are performed by 86ca3e8d88SDave Plauger * different CPUs, and are hence overlapped in time, unlike the older 87ca3e8d88SDave Plauger * serial code. 88ca3e8d88SDave Plauger * 89ca3e8d88SDave Plauger * Another important consideration is the speed of the dump 90ca3e8d88SDave Plauger * device. Faster disks need less CPUs in order to benefit from 91ca3e8d88SDave Plauger * parallel lzjb versus parallel bzip2. Therefore, the CPU count 92ca3e8d88SDave Plauger * threshold for switching from parallel lzjb to paralled bzip2 is 93ca3e8d88SDave Plauger * elevated for faster disks. The dump device speed is adduced from 94ca3e8d88SDave Plauger * the setting for dumpbuf.iosize, see dump_update_clevel. 95ca3e8d88SDave Plauger */ 96ca3e8d88SDave Plauger 97ca3e8d88SDave Plauger /* 98ca3e8d88SDave Plauger * exported vars 99ca3e8d88SDave Plauger */ 100ca3e8d88SDave Plauger kmutex_t dump_lock; /* lock for dump configuration */ 101ca3e8d88SDave Plauger dumphdr_t *dumphdr; /* dump header */ 1027c478bd9Sstevel@tonic-gate int dump_conflags = DUMP_KERNEL; /* dump configuration flags */ 103ca3e8d88SDave Plauger vnode_t *dumpvp; /* dump device vnode pointer */ 104ca3e8d88SDave Plauger u_offset_t dumpvp_size; /* size of dump device, in bytes */ 105ca3e8d88SDave Plauger char *dumppath; /* pathname of dump device */ 106ca3e8d88SDave Plauger int dump_timeout = 120; /* timeout for dumping pages */ 107ca3e8d88SDave Plauger int dump_timeleft; /* portion of dump_timeout remaining */ 108ca3e8d88SDave Plauger int dump_ioerr; /* dump i/o error */ 109ca3e8d88SDave Plauger int dump_check_used; /* enable check for used pages */ 110ca3e8d88SDave Plauger 111ca3e8d88SDave Plauger /* 112ca3e8d88SDave Plauger * Tunables for dump compression and parallelism. These can be set via 113ca3e8d88SDave Plauger * /etc/system. 114ca3e8d88SDave Plauger * 115ca3e8d88SDave Plauger * dump_ncpu_low number of helpers for parallel lzjb 116ca3e8d88SDave Plauger * This is also the minimum configuration. 117ca3e8d88SDave Plauger * 118ca3e8d88SDave Plauger * dump_bzip2_level bzip2 compression level: 1-9 119ca3e8d88SDave Plauger * Higher numbers give greater compression, but take more memory 120ca3e8d88SDave Plauger * and time. Memory used per helper is ~(dump_bzip2_level * 1MB). 121ca3e8d88SDave Plauger * 122ca3e8d88SDave Plauger * dump_plat_mincpu the cross-over limit for using bzip2 (per platform): 123ca3e8d88SDave Plauger * if dump_plat_mincpu == 0, then always do single threaded dump 124ca3e8d88SDave Plauger * if ncpu >= dump_plat_mincpu then try to use bzip2 125ca3e8d88SDave Plauger * 126ca3e8d88SDave Plauger * dump_metrics_on if set, metrics are collected in the kernel, passed 127ca3e8d88SDave Plauger * to savecore via the dump file, and recorded by savecore in 128ca3e8d88SDave Plauger * METRICS.txt. 129ca3e8d88SDave Plauger */ 130ca3e8d88SDave Plauger uint_t dump_ncpu_low = 4; /* minimum config for parallel lzjb */ 131ca3e8d88SDave Plauger uint_t dump_bzip2_level = 1; /* bzip2 level (1-9) */ 132ca3e8d88SDave Plauger 1339dd77bc8SDave Plauger /* tunables for pre-reserved heap */ 1349dd77bc8SDave Plauger uint_t dump_kmem_permap = 1024; 1359dd77bc8SDave Plauger uint_t dump_kmem_pages = 8; 1369dd77bc8SDave Plauger 137ca3e8d88SDave Plauger /* Define multiple buffers per helper to avoid stalling */ 138ca3e8d88SDave Plauger #define NCBUF_PER_HELPER 2 139ca3e8d88SDave Plauger #define NCMAP_PER_HELPER 4 140ca3e8d88SDave Plauger 141ca3e8d88SDave Plauger /* minimum number of helpers configured */ 142ca3e8d88SDave Plauger #define MINHELPERS (dump_ncpu_low) 143ca3e8d88SDave Plauger #define MINCBUFS (MINHELPERS * NCBUF_PER_HELPER) 144ca3e8d88SDave Plauger 145ca3e8d88SDave Plauger /* 146ca3e8d88SDave Plauger * Define constant parameters. 147ca3e8d88SDave Plauger * 148ca3e8d88SDave Plauger * CBUF_SIZE size of an output buffer 149ca3e8d88SDave Plauger * 150ca3e8d88SDave Plauger * CBUF_MAPSIZE size of virtual range for mapping pages 151ca3e8d88SDave Plauger * 152ca3e8d88SDave Plauger * CBUF_MAPNP size of virtual range in pages 153ca3e8d88SDave Plauger * 154ca3e8d88SDave Plauger */ 155ca3e8d88SDave Plauger #define DUMP_1KB ((size_t)1 << 10) 156ca3e8d88SDave Plauger #define DUMP_1MB ((size_t)1 << 20) 157ca3e8d88SDave Plauger #define CBUF_SIZE ((size_t)1 << 17) 158ca3e8d88SDave Plauger #define CBUF_MAPSHIFT (22) 159ca3e8d88SDave Plauger #define CBUF_MAPSIZE ((size_t)1 << CBUF_MAPSHIFT) 160ca3e8d88SDave Plauger #define CBUF_MAPNP ((size_t)1 << (CBUF_MAPSHIFT - PAGESHIFT)) 161ca3e8d88SDave Plauger 162ca3e8d88SDave Plauger /* 163ca3e8d88SDave Plauger * Compression metrics are accumulated nano-second subtotals. The 164ca3e8d88SDave Plauger * results are normalized by the number of pages dumped. A report is 165ca3e8d88SDave Plauger * generated when dumpsys() completes and is saved in the dump image 166ca3e8d88SDave Plauger * after the trailing dump header. 167ca3e8d88SDave Plauger * 168ca3e8d88SDave Plauger * Metrics are always collected. Set the variable dump_metrics_on to 169ca3e8d88SDave Plauger * cause metrics to be saved in the crash file, where savecore will 170ca3e8d88SDave Plauger * save it in the file METRICS.txt. 171ca3e8d88SDave Plauger */ 172ca3e8d88SDave Plauger #define PERPAGES \ 173ca3e8d88SDave Plauger PERPAGE(bitmap) PERPAGE(map) PERPAGE(unmap) \ 174ca3e8d88SDave Plauger PERPAGE(copy) PERPAGE(compress) \ 175ca3e8d88SDave Plauger PERPAGE(write) \ 176ca3e8d88SDave Plauger PERPAGE(inwait) PERPAGE(outwait) 177ca3e8d88SDave Plauger 178ca3e8d88SDave Plauger typedef struct perpage { 179ca3e8d88SDave Plauger #define PERPAGE(x) hrtime_t x; 180ca3e8d88SDave Plauger PERPAGES 181ca3e8d88SDave Plauger #undef PERPAGE 182ca3e8d88SDave Plauger } perpage_t; 183ca3e8d88SDave Plauger 184ca3e8d88SDave Plauger /* 185ca3e8d88SDave Plauger * This macro controls the code generation for collecting dump 186ca3e8d88SDave Plauger * performance information. By default, the code is generated, but 187ca3e8d88SDave Plauger * automatic saving of the information is disabled. If dump_metrics_on 188ca3e8d88SDave Plauger * is set to 1, the timing information is passed to savecore via the 189ca3e8d88SDave Plauger * crash file, where it is appended to the file dump-dir/METRICS.txt. 190ca3e8d88SDave Plauger */ 191ca3e8d88SDave Plauger #define COLLECT_METRICS 192ca3e8d88SDave Plauger 193ca3e8d88SDave Plauger #ifdef COLLECT_METRICS 194ca3e8d88SDave Plauger uint_t dump_metrics_on = 0; /* set to 1 to enable recording metrics */ 195ca3e8d88SDave Plauger 196ca3e8d88SDave Plauger #define HRSTART(v, m) v##ts.m = gethrtime() 197ca3e8d88SDave Plauger #define HRSTOP(v, m) v.m += gethrtime() - v##ts.m 198ca3e8d88SDave Plauger #define HRBEGIN(v, m, s) v##ts.m = gethrtime(); v.size += s 199ca3e8d88SDave Plauger #define HREND(v, m) v.m += gethrtime() - v##ts.m 200ca3e8d88SDave Plauger #define HRNORM(v, m, n) v.m /= (n) 2017c478bd9Sstevel@tonic-gate 2027c478bd9Sstevel@tonic-gate #else 203ca3e8d88SDave Plauger #define HRSTART(v, m) 204ca3e8d88SDave Plauger #define HRSTOP(v, m) 205ca3e8d88SDave Plauger #define HRBEGIN(v, m, s) 206ca3e8d88SDave Plauger #define HREND(v, m) 207ca3e8d88SDave Plauger #define HRNORM(v, m, n) 208ca3e8d88SDave Plauger #endif /* COLLECT_METRICS */ 209ca3e8d88SDave Plauger 210ca3e8d88SDave Plauger /* 211ca3e8d88SDave Plauger * Buffers for copying and compressing memory pages. 212ca3e8d88SDave Plauger * 213ca3e8d88SDave Plauger * cbuf_t buffer controllers: used for both input and output. 214ca3e8d88SDave Plauger * 215ca3e8d88SDave Plauger * The buffer state indicates how it is being used: 216ca3e8d88SDave Plauger * 217ca3e8d88SDave Plauger * CBUF_FREEMAP: CBUF_MAPSIZE virtual address range is available for 218ca3e8d88SDave Plauger * mapping input pages. 219ca3e8d88SDave Plauger * 220ca3e8d88SDave Plauger * CBUF_INREADY: input pages are mapped and ready for compression by a 221ca3e8d88SDave Plauger * helper. 222ca3e8d88SDave Plauger * 223ca3e8d88SDave Plauger * CBUF_USEDMAP: mapping has been consumed by a helper. Needs unmap. 224ca3e8d88SDave Plauger * 225ca3e8d88SDave Plauger * CBUF_FREEBUF: CBUF_SIZE output buffer, which is available. 226ca3e8d88SDave Plauger * 227ca3e8d88SDave Plauger * CBUF_WRITE: CBUF_SIZE block of compressed pages from a helper, 228ca3e8d88SDave Plauger * ready to write out. 229ca3e8d88SDave Plauger * 230ca3e8d88SDave Plauger * CBUF_ERRMSG: CBUF_SIZE block of error messages from a helper 231ca3e8d88SDave Plauger * (reports UE errors.) 232ca3e8d88SDave Plauger */ 233ca3e8d88SDave Plauger 234ca3e8d88SDave Plauger typedef enum cbufstate { 235ca3e8d88SDave Plauger CBUF_FREEMAP, 236ca3e8d88SDave Plauger CBUF_INREADY, 237ca3e8d88SDave Plauger CBUF_USEDMAP, 238ca3e8d88SDave Plauger CBUF_FREEBUF, 239ca3e8d88SDave Plauger CBUF_WRITE, 240ca3e8d88SDave Plauger CBUF_ERRMSG 241ca3e8d88SDave Plauger } cbufstate_t; 242ca3e8d88SDave Plauger 243ca3e8d88SDave Plauger typedef struct cbuf cbuf_t; 244ca3e8d88SDave Plauger 245ca3e8d88SDave Plauger struct cbuf { 246ca3e8d88SDave Plauger cbuf_t *next; /* next in list */ 247ca3e8d88SDave Plauger cbufstate_t state; /* processing state */ 248ca3e8d88SDave Plauger size_t used; /* amount used */ 249ca3e8d88SDave Plauger size_t size; /* mem size */ 250ca3e8d88SDave Plauger char *buf; /* kmem or vmem */ 251ca3e8d88SDave Plauger pgcnt_t pagenum; /* index to pfn map */ 252ca3e8d88SDave Plauger pgcnt_t bitnum; /* first set bitnum */ 253ca3e8d88SDave Plauger pfn_t pfn; /* first pfn in mapped range */ 254ca3e8d88SDave Plauger int off; /* byte offset to first pfn */ 255ca3e8d88SDave Plauger }; 256ca3e8d88SDave Plauger 257ca3e8d88SDave Plauger /* 258ca3e8d88SDave Plauger * cqueue_t queues: a uni-directional channel for communication 259ca3e8d88SDave Plauger * from the master to helper tasks or vice-versa using put and 260ca3e8d88SDave Plauger * get primitives. Both mappings and data buffers are passed via 261ca3e8d88SDave Plauger * queues. Producers close a queue when done. The number of 262ca3e8d88SDave Plauger * active producers is reference counted so the consumer can 263ca3e8d88SDave Plauger * detect end of data. Concurrent access is mediated by atomic 264ca3e8d88SDave Plauger * operations for panic dump, or mutex/cv for live dump. 265ca3e8d88SDave Plauger * 266ca3e8d88SDave Plauger * There a four queues, used as follows: 267ca3e8d88SDave Plauger * 268ca3e8d88SDave Plauger * Queue Dataflow NewState 269ca3e8d88SDave Plauger * -------------------------------------------------- 270ca3e8d88SDave Plauger * mainq master -> master FREEMAP 271ca3e8d88SDave Plauger * master has initialized or unmapped an input buffer 272ca3e8d88SDave Plauger * -------------------------------------------------- 273ca3e8d88SDave Plauger * helperq master -> helper INREADY 274ca3e8d88SDave Plauger * master has mapped input for use by helper 275ca3e8d88SDave Plauger * -------------------------------------------------- 276ca3e8d88SDave Plauger * mainq master <- helper USEDMAP 277ca3e8d88SDave Plauger * helper is done with input 278ca3e8d88SDave Plauger * -------------------------------------------------- 279ca3e8d88SDave Plauger * freebufq master -> helper FREEBUF 280ca3e8d88SDave Plauger * master has initialized or written an output buffer 281ca3e8d88SDave Plauger * -------------------------------------------------- 282ca3e8d88SDave Plauger * mainq master <- helper WRITE 283ca3e8d88SDave Plauger * block of compressed pages from a helper 284ca3e8d88SDave Plauger * -------------------------------------------------- 285ca3e8d88SDave Plauger * mainq master <- helper ERRMSG 286ca3e8d88SDave Plauger * error messages from a helper (memory error case) 287ca3e8d88SDave Plauger * -------------------------------------------------- 288ca3e8d88SDave Plauger * writerq master <- master WRITE 289ca3e8d88SDave Plauger * non-blocking queue of blocks to write 290ca3e8d88SDave Plauger * -------------------------------------------------- 291ca3e8d88SDave Plauger */ 292ca3e8d88SDave Plauger typedef struct cqueue { 293ca3e8d88SDave Plauger cbuf_t *volatile first; /* first in list */ 294ca3e8d88SDave Plauger cbuf_t *last; /* last in list */ 295ca3e8d88SDave Plauger hrtime_t ts; /* timestamp */ 296ca3e8d88SDave Plauger hrtime_t empty; /* total time empty */ 297ca3e8d88SDave Plauger kmutex_t mutex; /* live state lock */ 298ca3e8d88SDave Plauger kcondvar_t cv; /* live wait var */ 299ca3e8d88SDave Plauger lock_t spinlock; /* panic mode spin lock */ 300ca3e8d88SDave Plauger volatile uint_t open; /* producer ref count */ 301ca3e8d88SDave Plauger } cqueue_t; 302ca3e8d88SDave Plauger 303ca3e8d88SDave Plauger /* 304ca3e8d88SDave Plauger * Convenience macros for using the cqueue functions 305ca3e8d88SDave Plauger * Note that the caller must have defined "dumpsync_t *ds" 306ca3e8d88SDave Plauger */ 307ca3e8d88SDave Plauger #define CQ_IS_EMPTY(q) \ 308ca3e8d88SDave Plauger (ds->q.first == NULL) 309ca3e8d88SDave Plauger 310ca3e8d88SDave Plauger #define CQ_OPEN(q) \ 311ca3e8d88SDave Plauger atomic_inc_uint(&ds->q.open) 312ca3e8d88SDave Plauger 313ca3e8d88SDave Plauger #define CQ_CLOSE(q) \ 314ca3e8d88SDave Plauger dumpsys_close_cq(&ds->q, ds->live) 315ca3e8d88SDave Plauger 316ca3e8d88SDave Plauger #define CQ_PUT(q, cp, st) \ 317ca3e8d88SDave Plauger dumpsys_put_cq(&ds->q, cp, st, ds->live) 318ca3e8d88SDave Plauger 319ca3e8d88SDave Plauger #define CQ_GET(q) \ 320ca3e8d88SDave Plauger dumpsys_get_cq(&ds->q, ds->live) 321ca3e8d88SDave Plauger 322ca3e8d88SDave Plauger /* 323ca3e8d88SDave Plauger * Dynamic state when dumpsys() is running. 324ca3e8d88SDave Plauger */ 325ca3e8d88SDave Plauger typedef struct dumpsync { 326ca3e8d88SDave Plauger pgcnt_t npages; /* subtotal of pages dumped */ 327ca3e8d88SDave Plauger pgcnt_t pages_mapped; /* subtotal of pages mapped */ 328ca3e8d88SDave Plauger pgcnt_t pages_used; /* subtotal of pages used per map */ 329ca3e8d88SDave Plauger size_t nwrite; /* subtotal of bytes written */ 330ca3e8d88SDave Plauger uint_t live; /* running live dump */ 331ca3e8d88SDave Plauger uint_t neednl; /* will need to print a newline */ 332ca3e8d88SDave Plauger uint_t percent; /* dump progress */ 333ca3e8d88SDave Plauger uint_t percent_done; /* dump progress reported */ 334ca3e8d88SDave Plauger cqueue_t freebufq; /* free kmem bufs for writing */ 335ca3e8d88SDave Plauger cqueue_t mainq; /* input for main task */ 336ca3e8d88SDave Plauger cqueue_t helperq; /* input for helpers */ 337ca3e8d88SDave Plauger cqueue_t writerq; /* input for writer */ 338ca3e8d88SDave Plauger hrtime_t start; /* start time */ 339ca3e8d88SDave Plauger hrtime_t elapsed; /* elapsed time when completed */ 340ca3e8d88SDave Plauger hrtime_t iotime; /* time spent writing nwrite bytes */ 341ca3e8d88SDave Plauger hrtime_t iowait; /* time spent waiting for output */ 342ca3e8d88SDave Plauger hrtime_t iowaitts; /* iowait timestamp */ 343ca3e8d88SDave Plauger perpage_t perpage; /* metrics */ 344ca3e8d88SDave Plauger perpage_t perpagets; 345ca3e8d88SDave Plauger int dumpcpu; /* master cpu */ 346ca3e8d88SDave Plauger } dumpsync_t; 347ca3e8d88SDave Plauger 348ca3e8d88SDave Plauger static dumpsync_t dumpsync; /* synchronization vars */ 349ca3e8d88SDave Plauger 350ca3e8d88SDave Plauger /* 351ca3e8d88SDave Plauger * helper_t helpers: contains the context for a stream. CPUs run in 352ca3e8d88SDave Plauger * parallel at dump time; each CPU creates a single stream of 353ca3e8d88SDave Plauger * compression data. Stream data is divided into CBUF_SIZE blocks. 354ca3e8d88SDave Plauger * The blocks are written in order within a stream. But, blocks from 355ca3e8d88SDave Plauger * multiple streams can be interleaved. Each stream is identified by a 356ca3e8d88SDave Plauger * unique tag. 357ca3e8d88SDave Plauger */ 358ca3e8d88SDave Plauger typedef struct helper { 359ca3e8d88SDave Plauger int helper; /* bound helper id */ 360ca3e8d88SDave Plauger int tag; /* compression stream tag */ 361ca3e8d88SDave Plauger perpage_t perpage; /* per page metrics */ 362ca3e8d88SDave Plauger perpage_t perpagets; /* per page metrics (timestamps) */ 363ca3e8d88SDave Plauger taskqid_t taskqid; /* live dump task ptr */ 364ca3e8d88SDave Plauger int in, out; /* buffer offsets */ 365ca3e8d88SDave Plauger cbuf_t *cpin, *cpout, *cperr; /* cbuf objects in process */ 366ca3e8d88SDave Plauger dumpsync_t *ds; /* pointer to sync vars */ 367ca3e8d88SDave Plauger size_t used; /* counts input consumed */ 368ca3e8d88SDave Plauger char *page; /* buffer for page copy */ 369ca3e8d88SDave Plauger char *lzbuf; /* lzjb output */ 370ca3e8d88SDave Plauger bz_stream bzstream; /* bzip2 state */ 371ca3e8d88SDave Plauger } helper_t; 372ca3e8d88SDave Plauger 373ca3e8d88SDave Plauger #define MAINHELPER (-1) /* helper is also the main task */ 374ca3e8d88SDave Plauger #define FREEHELPER (-2) /* unbound helper */ 375ca3e8d88SDave Plauger #define DONEHELPER (-3) /* helper finished */ 3767c478bd9Sstevel@tonic-gate 377ca3e8d88SDave Plauger /* 378ca3e8d88SDave Plauger * configuration vars for dumpsys 379ca3e8d88SDave Plauger */ 380ca3e8d88SDave Plauger typedef struct dumpcfg { 381ca3e8d88SDave Plauger int threshold; /* ncpu threshold for bzip2 */ 382ca3e8d88SDave Plauger int nhelper; /* number of helpers */ 383ca3e8d88SDave Plauger int nhelper_used; /* actual number of helpers used */ 384ca3e8d88SDave Plauger int ncmap; /* number VA pages for compression */ 385ca3e8d88SDave Plauger int ncbuf; /* number of bufs for compression */ 386ca3e8d88SDave Plauger int ncbuf_used; /* number of bufs in use */ 387ca3e8d88SDave Plauger uint_t clevel; /* dump compression level */ 388ca3e8d88SDave Plauger helper_t *helper; /* array of helpers */ 389ca3e8d88SDave Plauger cbuf_t *cmap; /* array of input (map) buffers */ 390ca3e8d88SDave Plauger cbuf_t *cbuf; /* array of output buffers */ 391ca3e8d88SDave Plauger ulong_t *helpermap; /* set of dumpsys helper CPU ids */ 392ca3e8d88SDave Plauger ulong_t *bitmap; /* bitmap for marking pages to dump */ 393ca3e8d88SDave Plauger ulong_t *rbitmap; /* bitmap for used CBUF_MAPSIZE ranges */ 394ca3e8d88SDave Plauger pgcnt_t bitmapsize; /* size of bitmap */ 395ca3e8d88SDave Plauger pgcnt_t rbitmapsize; /* size of bitmap for ranges */ 396ca3e8d88SDave Plauger pgcnt_t found4m; /* number ranges allocated by dump */ 397ca3e8d88SDave Plauger pgcnt_t foundsm; /* number small pages allocated by dump */ 398ca3e8d88SDave Plauger pid_t *pids; /* list of process IDs at dump time */ 399ca3e8d88SDave Plauger size_t maxsize; /* memory size needed at dump time */ 400ca3e8d88SDave Plauger size_t maxvmsize; /* size of reserved VM */ 401ca3e8d88SDave Plauger char *maxvm; /* reserved VM for spare pages */ 402ca3e8d88SDave Plauger lock_t helper_lock; /* protect helper state */ 403ca3e8d88SDave Plauger char helpers_wanted; /* flag to enable parallelism */ 404ca3e8d88SDave Plauger } dumpcfg_t; 405ca3e8d88SDave Plauger 406ca3e8d88SDave Plauger static dumpcfg_t dumpcfg; /* config vars */ 407ca3e8d88SDave Plauger 408ca3e8d88SDave Plauger /* 409ca3e8d88SDave Plauger * The dump I/O buffer. 410ca3e8d88SDave Plauger * 411ca3e8d88SDave Plauger * There is one I/O buffer used by dumpvp_write and dumvp_flush. It is 412ca3e8d88SDave Plauger * sized according to the optimum device transfer speed. 413ca3e8d88SDave Plauger */ 414ca3e8d88SDave Plauger typedef struct dumpbuf { 415ca3e8d88SDave Plauger vnode_t *cdev_vp; /* VCHR open of the dump device */ 416ca3e8d88SDave Plauger len_t vp_limit; /* maximum write offset */ 417ca3e8d88SDave Plauger offset_t vp_off; /* current dump device offset */ 418ca3e8d88SDave Plauger char *cur; /* dump write pointer */ 419ca3e8d88SDave Plauger char *start; /* dump buffer address */ 420ca3e8d88SDave Plauger char *end; /* dump buffer end */ 421ca3e8d88SDave Plauger size_t size; /* size of dumpbuf in bytes */ 422ca3e8d88SDave Plauger size_t iosize; /* best transfer size for device */ 423ca3e8d88SDave Plauger } dumpbuf_t; 424ca3e8d88SDave Plauger 425ca3e8d88SDave Plauger dumpbuf_t dumpbuf; /* I/O buffer */ 426ca3e8d88SDave Plauger 427ca3e8d88SDave Plauger /* 428ca3e8d88SDave Plauger * The dump I/O buffer must be at least one page, at most xfer_size 429ca3e8d88SDave Plauger * bytes, and should scale with physmem in between. The transfer size 430ca3e8d88SDave Plauger * passed in will either represent a global default (maxphys) or the 431ca3e8d88SDave Plauger * best size for the device. The size of the dumpbuf I/O buffer is 432ca3e8d88SDave Plauger * limited by dumpbuf_limit (8MB by default) because the dump 433ca3e8d88SDave Plauger * performance saturates beyond a certain size. The default is to 434ca3e8d88SDave Plauger * select 1/4096 of the memory. 4357c478bd9Sstevel@tonic-gate */ 436ca3e8d88SDave Plauger static int dumpbuf_fraction = 12; /* memory size scale factor */ 437ca3e8d88SDave Plauger static size_t dumpbuf_limit = 8 * DUMP_1MB; /* max I/O buf size */ 438ca3e8d88SDave Plauger 4397c478bd9Sstevel@tonic-gate static size_t 4407c478bd9Sstevel@tonic-gate dumpbuf_iosize(size_t xfer_size) 4417c478bd9Sstevel@tonic-gate { 442ca3e8d88SDave Plauger size_t iosize = ptob(physmem >> dumpbuf_fraction); 443ca3e8d88SDave Plauger 444ca3e8d88SDave Plauger if (iosize < PAGESIZE) 445ca3e8d88SDave Plauger iosize = PAGESIZE; 446ca3e8d88SDave Plauger else if (iosize > xfer_size) 447ca3e8d88SDave Plauger iosize = xfer_size; 448ca3e8d88SDave Plauger if (iosize > dumpbuf_limit) 449ca3e8d88SDave Plauger iosize = dumpbuf_limit; 450ca3e8d88SDave Plauger return (iosize & PAGEMASK); 4517c478bd9Sstevel@tonic-gate } 4527c478bd9Sstevel@tonic-gate 453ca3e8d88SDave Plauger /* 454ca3e8d88SDave Plauger * resize the I/O buffer 455ca3e8d88SDave Plauger */ 4567c478bd9Sstevel@tonic-gate static void 4577c478bd9Sstevel@tonic-gate dumpbuf_resize(void) 4587c478bd9Sstevel@tonic-gate { 459ca3e8d88SDave Plauger char *old_buf = dumpbuf.start; 460ca3e8d88SDave Plauger size_t old_size = dumpbuf.size; 4617c478bd9Sstevel@tonic-gate char *new_buf; 4627c478bd9Sstevel@tonic-gate size_t new_size; 4637c478bd9Sstevel@tonic-gate 4647c478bd9Sstevel@tonic-gate ASSERT(MUTEX_HELD(&dump_lock)); 4657c478bd9Sstevel@tonic-gate 466ca3e8d88SDave Plauger new_size = dumpbuf_iosize(MAX(dumpbuf.iosize, maxphys)); 467ca3e8d88SDave Plauger if (new_size <= old_size) 4687c478bd9Sstevel@tonic-gate return; /* no need to reallocate buffer */ 4697c478bd9Sstevel@tonic-gate 4707c478bd9Sstevel@tonic-gate new_buf = kmem_alloc(new_size, KM_SLEEP); 471ca3e8d88SDave Plauger dumpbuf.size = new_size; 472ca3e8d88SDave Plauger dumpbuf.start = new_buf; 473ca3e8d88SDave Plauger dumpbuf.end = new_buf + new_size; 4747c478bd9Sstevel@tonic-gate kmem_free(old_buf, old_size); 4757c478bd9Sstevel@tonic-gate } 4767c478bd9Sstevel@tonic-gate 477ca3e8d88SDave Plauger /* 478ca3e8d88SDave Plauger * dump_update_clevel is called when dumpadm configures the dump device. 479ca3e8d88SDave Plauger * Calculate number of helpers and buffers. 480ca3e8d88SDave Plauger * Allocate the minimum configuration for now. 481ca3e8d88SDave Plauger * 482ca3e8d88SDave Plauger * When the dump file is configured we reserve a minimum amount of 483ca3e8d88SDave Plauger * memory for use at crash time. But we reserve VA for all the memory 484ca3e8d88SDave Plauger * we really want in order to do the fastest dump possible. The VA is 485ca3e8d88SDave Plauger * backed by pages not being dumped, according to the bitmap. If 486ca3e8d88SDave Plauger * there is insufficient spare memory, however, we fall back to the 487ca3e8d88SDave Plauger * minimum. 488ca3e8d88SDave Plauger * 489ca3e8d88SDave Plauger * Live dump (savecore -L) always uses the minimum config. 490ca3e8d88SDave Plauger * 491ca3e8d88SDave Plauger * clevel 0 is single threaded lzjb 492ca3e8d88SDave Plauger * clevel 1 is parallel lzjb 493ca3e8d88SDave Plauger * clevel 2 is parallel bzip2 494ca3e8d88SDave Plauger * 495ca3e8d88SDave Plauger * The ncpu threshold is selected with dump_plat_mincpu. 496ca3e8d88SDave Plauger * On OPL, set_platform_defaults() overrides the sun4u setting. 497ca3e8d88SDave Plauger * The actual values are defined via DUMP_PLAT_*_MINCPU macros. 498ca3e8d88SDave Plauger * 499ca3e8d88SDave Plauger * Architecture Threshold Algorithm 500ca3e8d88SDave Plauger * sun4u < 51 parallel lzjb 501ca3e8d88SDave Plauger * sun4u >= 51 parallel bzip2(*) 502ca3e8d88SDave Plauger * sun4u OPL < 8 parallel lzjb 503ca3e8d88SDave Plauger * sun4u OPL >= 8 parallel bzip2(*) 504ca3e8d88SDave Plauger * sun4v < 128 parallel lzjb 505ca3e8d88SDave Plauger * sun4v >= 128 parallel bzip2(*) 506ca3e8d88SDave Plauger * x86 < 11 parallel lzjb 507ca3e8d88SDave Plauger * x86 >= 11 parallel bzip2(*) 508ca3e8d88SDave Plauger * 32-bit N/A single-threaded lzjb 509ca3e8d88SDave Plauger * 510ca3e8d88SDave Plauger * (*) bzip2 is only chosen if there is sufficient available 511ca3e8d88SDave Plauger * memory for buffers at dump time. See dumpsys_get_maxmem(). 512ca3e8d88SDave Plauger * 513ca3e8d88SDave Plauger * Faster dump devices have larger I/O buffers. The threshold value is 514ca3e8d88SDave Plauger * increased according to the size of the dump I/O buffer, because 515ca3e8d88SDave Plauger * parallel lzjb performs better with faster disks. For buffers >= 1MB 516ca3e8d88SDave Plauger * the threshold is 3X; for buffers >= 256K threshold is 2X. 517ca3e8d88SDave Plauger * 518ca3e8d88SDave Plauger * For parallel dumps, the number of helpers is ncpu-1. The CPU 519ca3e8d88SDave Plauger * running panic runs the main task. For single-threaded dumps, the 520ca3e8d88SDave Plauger * panic CPU does lzjb compression (it is tagged as MAINHELPER.) 521ca3e8d88SDave Plauger * 522ca3e8d88SDave Plauger * Need multiple buffers per helper so that they do not block waiting 523ca3e8d88SDave Plauger * for the main task. 524ca3e8d88SDave Plauger * parallel single-threaded 525ca3e8d88SDave Plauger * Number of output buffers: nhelper*2 1 526ca3e8d88SDave Plauger * Number of mapping buffers: nhelper*4 1 527ca3e8d88SDave Plauger * 528ca3e8d88SDave Plauger */ 529ca3e8d88SDave Plauger static void 530ca3e8d88SDave Plauger dump_update_clevel() 531ca3e8d88SDave Plauger { 532ca3e8d88SDave Plauger int tag; 533ca3e8d88SDave Plauger size_t bz2size; 534ca3e8d88SDave Plauger helper_t *hp, *hpend; 535ca3e8d88SDave Plauger cbuf_t *cp, *cpend; 536ca3e8d88SDave Plauger dumpcfg_t *old = &dumpcfg; 537ca3e8d88SDave Plauger dumpcfg_t newcfg = *old; 538ca3e8d88SDave Plauger dumpcfg_t *new = &newcfg; 539ca3e8d88SDave Plauger 540ca3e8d88SDave Plauger ASSERT(MUTEX_HELD(&dump_lock)); 541ca3e8d88SDave Plauger 542ca3e8d88SDave Plauger /* 543ca3e8d88SDave Plauger * Free the previously allocated bufs and VM. 544ca3e8d88SDave Plauger */ 545ca3e8d88SDave Plauger if (old->helper != NULL) { 546ca3e8d88SDave Plauger 547ca3e8d88SDave Plauger /* helpers */ 548ca3e8d88SDave Plauger hpend = &old->helper[old->nhelper]; 549ca3e8d88SDave Plauger for (hp = old->helper; hp != hpend; hp++) { 550ca3e8d88SDave Plauger if (hp->lzbuf != NULL) 551ca3e8d88SDave Plauger kmem_free(hp->lzbuf, PAGESIZE); 552ca3e8d88SDave Plauger if (hp->page != NULL) 553ca3e8d88SDave Plauger kmem_free(hp->page, PAGESIZE); 554ca3e8d88SDave Plauger } 555ca3e8d88SDave Plauger kmem_free(old->helper, old->nhelper * sizeof (helper_t)); 556ca3e8d88SDave Plauger 557ca3e8d88SDave Plauger /* VM space for mapping pages */ 558ca3e8d88SDave Plauger cpend = &old->cmap[old->ncmap]; 559ca3e8d88SDave Plauger for (cp = old->cmap; cp != cpend; cp++) 560ca3e8d88SDave Plauger vmem_xfree(heap_arena, cp->buf, CBUF_MAPSIZE); 561ca3e8d88SDave Plauger kmem_free(old->cmap, old->ncmap * sizeof (cbuf_t)); 562ca3e8d88SDave Plauger 563ca3e8d88SDave Plauger /* output bufs */ 564ca3e8d88SDave Plauger cpend = &old->cbuf[old->ncbuf]; 565ca3e8d88SDave Plauger for (cp = old->cbuf; cp != cpend; cp++) 566ca3e8d88SDave Plauger if (cp->buf != NULL) 567ca3e8d88SDave Plauger kmem_free(cp->buf, cp->size); 568ca3e8d88SDave Plauger kmem_free(old->cbuf, old->ncbuf * sizeof (cbuf_t)); 569ca3e8d88SDave Plauger 570ca3e8d88SDave Plauger /* reserved VM for dumpsys_get_maxmem */ 571ca3e8d88SDave Plauger if (old->maxvmsize > 0) 572ca3e8d88SDave Plauger vmem_xfree(heap_arena, old->maxvm, old->maxvmsize); 573ca3e8d88SDave Plauger } 574ca3e8d88SDave Plauger 575ca3e8d88SDave Plauger /* 576ca3e8d88SDave Plauger * Allocate memory and VM. 577ca3e8d88SDave Plauger * One CPU runs dumpsys, the rest are helpers. 578ca3e8d88SDave Plauger */ 579ca3e8d88SDave Plauger new->nhelper = ncpus - 1; 580ca3e8d88SDave Plauger if (new->nhelper < 1) 581ca3e8d88SDave Plauger new->nhelper = 1; 582ca3e8d88SDave Plauger 583ca3e8d88SDave Plauger if (new->nhelper > DUMP_MAX_NHELPER) 584ca3e8d88SDave Plauger new->nhelper = DUMP_MAX_NHELPER; 585ca3e8d88SDave Plauger 586ca3e8d88SDave Plauger /* increase threshold for faster disks */ 587ca3e8d88SDave Plauger new->threshold = dump_plat_mincpu; 588ca3e8d88SDave Plauger if (dumpbuf.iosize >= DUMP_1MB) 589ca3e8d88SDave Plauger new->threshold *= 3; 590ca3e8d88SDave Plauger else if (dumpbuf.iosize >= (256 * DUMP_1KB)) 591ca3e8d88SDave Plauger new->threshold *= 2; 592ca3e8d88SDave Plauger 593ca3e8d88SDave Plauger /* figure compression level based upon the computed threshold. */ 594ca3e8d88SDave Plauger if (dump_plat_mincpu == 0 || new->nhelper < 2) { 595ca3e8d88SDave Plauger new->clevel = 0; 596ca3e8d88SDave Plauger new->nhelper = 1; 597ca3e8d88SDave Plauger } else if ((new->nhelper + 1) >= new->threshold) { 598ca3e8d88SDave Plauger new->clevel = DUMP_CLEVEL_BZIP2; 599ca3e8d88SDave Plauger } else { 600ca3e8d88SDave Plauger new->clevel = DUMP_CLEVEL_LZJB; 601ca3e8d88SDave Plauger } 602ca3e8d88SDave Plauger 603ca3e8d88SDave Plauger if (new->clevel == 0) { 604ca3e8d88SDave Plauger new->ncbuf = 1; 605ca3e8d88SDave Plauger new->ncmap = 1; 606ca3e8d88SDave Plauger } else { 607ca3e8d88SDave Plauger new->ncbuf = NCBUF_PER_HELPER * new->nhelper; 608ca3e8d88SDave Plauger new->ncmap = NCMAP_PER_HELPER * new->nhelper; 609ca3e8d88SDave Plauger } 610ca3e8d88SDave Plauger 611ca3e8d88SDave Plauger /* 612ca3e8d88SDave Plauger * Allocate new data structures and buffers for MINHELPERS, 613ca3e8d88SDave Plauger * and also figure the max desired size. 614ca3e8d88SDave Plauger */ 615ca3e8d88SDave Plauger bz2size = BZ2_bzCompressInitSize(dump_bzip2_level); 616ca3e8d88SDave Plauger new->maxsize = 0; 617ca3e8d88SDave Plauger new->maxvmsize = 0; 618ca3e8d88SDave Plauger new->maxvm = NULL; 619ca3e8d88SDave Plauger tag = 1; 620ca3e8d88SDave Plauger new->helper = kmem_zalloc(new->nhelper * sizeof (helper_t), KM_SLEEP); 621ca3e8d88SDave Plauger hpend = &new->helper[new->nhelper]; 622ca3e8d88SDave Plauger for (hp = new->helper; hp != hpend; hp++) { 623ca3e8d88SDave Plauger hp->tag = tag++; 624ca3e8d88SDave Plauger if (hp < &new->helper[MINHELPERS]) { 625ca3e8d88SDave Plauger hp->lzbuf = kmem_alloc(PAGESIZE, KM_SLEEP); 626ca3e8d88SDave Plauger hp->page = kmem_alloc(PAGESIZE, KM_SLEEP); 627ca3e8d88SDave Plauger } else if (new->clevel < DUMP_CLEVEL_BZIP2) { 628ca3e8d88SDave Plauger new->maxsize += 2 * PAGESIZE; 629ca3e8d88SDave Plauger } else { 630ca3e8d88SDave Plauger new->maxsize += PAGESIZE; 631ca3e8d88SDave Plauger } 632ca3e8d88SDave Plauger if (new->clevel >= DUMP_CLEVEL_BZIP2) 633ca3e8d88SDave Plauger new->maxsize += bz2size; 634ca3e8d88SDave Plauger } 635ca3e8d88SDave Plauger 636ca3e8d88SDave Plauger new->cbuf = kmem_zalloc(new->ncbuf * sizeof (cbuf_t), KM_SLEEP); 637ca3e8d88SDave Plauger cpend = &new->cbuf[new->ncbuf]; 638ca3e8d88SDave Plauger for (cp = new->cbuf; cp != cpend; cp++) { 639ca3e8d88SDave Plauger cp->state = CBUF_FREEBUF; 640ca3e8d88SDave Plauger cp->size = CBUF_SIZE; 641ca3e8d88SDave Plauger if (cp < &new->cbuf[MINCBUFS]) 642ca3e8d88SDave Plauger cp->buf = kmem_alloc(cp->size, KM_SLEEP); 643ca3e8d88SDave Plauger else 644ca3e8d88SDave Plauger new->maxsize += cp->size; 645ca3e8d88SDave Plauger } 646ca3e8d88SDave Plauger 647ca3e8d88SDave Plauger new->cmap = kmem_zalloc(new->ncmap * sizeof (cbuf_t), KM_SLEEP); 648ca3e8d88SDave Plauger cpend = &new->cmap[new->ncmap]; 649ca3e8d88SDave Plauger for (cp = new->cmap; cp != cpend; cp++) { 650ca3e8d88SDave Plauger cp->state = CBUF_FREEMAP; 651ca3e8d88SDave Plauger cp->size = CBUF_MAPSIZE; 652ca3e8d88SDave Plauger cp->buf = vmem_xalloc(heap_arena, CBUF_MAPSIZE, CBUF_MAPSIZE, 653ca3e8d88SDave Plauger 0, 0, NULL, NULL, VM_SLEEP); 654ca3e8d88SDave Plauger } 655ca3e8d88SDave Plauger 656ca3e8d88SDave Plauger /* reserve VA to be backed with spare pages at crash time */ 657ca3e8d88SDave Plauger if (new->maxsize > 0) { 658ca3e8d88SDave Plauger new->maxsize = P2ROUNDUP(new->maxsize, PAGESIZE); 659ca3e8d88SDave Plauger new->maxvmsize = P2ROUNDUP(new->maxsize, CBUF_MAPSIZE); 660ca3e8d88SDave Plauger new->maxvm = vmem_xalloc(heap_arena, new->maxvmsize, 661ca3e8d88SDave Plauger CBUF_MAPSIZE, 0, 0, NULL, NULL, VM_SLEEP); 662ca3e8d88SDave Plauger } 663ca3e8d88SDave Plauger 6649dd77bc8SDave Plauger /* 6659dd77bc8SDave Plauger * Reserve memory for kmem allocation calls made during crash 6669dd77bc8SDave Plauger * dump. The hat layer allocates memory for each mapping 6679dd77bc8SDave Plauger * created, and the I/O path allocates buffers and data structs. 6689dd77bc8SDave Plauger * Add a few pages for safety. 6699dd77bc8SDave Plauger */ 6709dd77bc8SDave Plauger kmem_dump_init((new->ncmap * dump_kmem_permap) + 6719dd77bc8SDave Plauger (dump_kmem_pages * PAGESIZE)); 6729dd77bc8SDave Plauger 673ca3e8d88SDave Plauger /* set new config pointers */ 674ca3e8d88SDave Plauger *old = *new; 675ca3e8d88SDave Plauger } 676ca3e8d88SDave Plauger 677ca3e8d88SDave Plauger /* 678ca3e8d88SDave Plauger * Define a struct memlist walker to optimize bitnum to pfn 679ca3e8d88SDave Plauger * lookup. The walker maintains the state of the list traversal. 680ca3e8d88SDave Plauger */ 681ca3e8d88SDave Plauger typedef struct dumpmlw { 682ca3e8d88SDave Plauger struct memlist *mp; /* current memlist */ 683ca3e8d88SDave Plauger pgcnt_t basenum; /* bitnum base offset */ 684ca3e8d88SDave Plauger pgcnt_t mppages; /* current memlist size */ 685ca3e8d88SDave Plauger pgcnt_t mpleft; /* size to end of current memlist */ 686ca3e8d88SDave Plauger pfn_t mpaddr; /* first pfn in memlist */ 687ca3e8d88SDave Plauger } dumpmlw_t; 688ca3e8d88SDave Plauger 689ca3e8d88SDave Plauger /* initialize the walker */ 690ca3e8d88SDave Plauger static inline void 691ca3e8d88SDave Plauger dump_init_memlist_walker(dumpmlw_t *pw) 692ca3e8d88SDave Plauger { 693ca3e8d88SDave Plauger pw->mp = phys_install; 694ca3e8d88SDave Plauger pw->basenum = 0; 69556f33205SJonathan Adams pw->mppages = pw->mp->ml_size >> PAGESHIFT; 696ca3e8d88SDave Plauger pw->mpleft = pw->mppages; 69756f33205SJonathan Adams pw->mpaddr = pw->mp->ml_address >> PAGESHIFT; 698ca3e8d88SDave Plauger } 699ca3e8d88SDave Plauger 700ca3e8d88SDave Plauger /* 701ca3e8d88SDave Plauger * Lookup pfn given bitnum. The memlist can be quite long on some 702ca3e8d88SDave Plauger * systems (e.g.: one per board). To optimize sequential lookups, the 703ca3e8d88SDave Plauger * caller initializes and presents a memlist walker. 704ca3e8d88SDave Plauger */ 705ca3e8d88SDave Plauger static pfn_t 706ca3e8d88SDave Plauger dump_bitnum_to_pfn(pgcnt_t bitnum, dumpmlw_t *pw) 707ca3e8d88SDave Plauger { 708ca3e8d88SDave Plauger bitnum -= pw->basenum; 709ca3e8d88SDave Plauger while (pw->mp != NULL) { 710ca3e8d88SDave Plauger if (bitnum < pw->mppages) { 711ca3e8d88SDave Plauger pw->mpleft = pw->mppages - bitnum; 712ca3e8d88SDave Plauger return (pw->mpaddr + bitnum); 713ca3e8d88SDave Plauger } 714ca3e8d88SDave Plauger bitnum -= pw->mppages; 715ca3e8d88SDave Plauger pw->basenum += pw->mppages; 71656f33205SJonathan Adams pw->mp = pw->mp->ml_next; 717ca3e8d88SDave Plauger if (pw->mp != NULL) { 71856f33205SJonathan Adams pw->mppages = pw->mp->ml_size >> PAGESHIFT; 719ca3e8d88SDave Plauger pw->mpleft = pw->mppages; 72056f33205SJonathan Adams pw->mpaddr = pw->mp->ml_address >> PAGESHIFT; 721ca3e8d88SDave Plauger } 722ca3e8d88SDave Plauger } 723ca3e8d88SDave Plauger return (PFN_INVALID); 724ca3e8d88SDave Plauger } 725ca3e8d88SDave Plauger 726ca3e8d88SDave Plauger static pgcnt_t 727ca3e8d88SDave Plauger dump_pfn_to_bitnum(pfn_t pfn) 728ca3e8d88SDave Plauger { 729ca3e8d88SDave Plauger struct memlist *mp; 730ca3e8d88SDave Plauger pgcnt_t bitnum = 0; 731ca3e8d88SDave Plauger 73256f33205SJonathan Adams for (mp = phys_install; mp != NULL; mp = mp->ml_next) { 73356f33205SJonathan Adams if (pfn >= (mp->ml_address >> PAGESHIFT) && 73456f33205SJonathan Adams pfn < ((mp->ml_address + mp->ml_size) >> PAGESHIFT)) 73556f33205SJonathan Adams return (bitnum + pfn - (mp->ml_address >> PAGESHIFT)); 73656f33205SJonathan Adams bitnum += mp->ml_size >> PAGESHIFT; 737ca3e8d88SDave Plauger } 738ca3e8d88SDave Plauger return ((pgcnt_t)-1); 739ca3e8d88SDave Plauger } 740ca3e8d88SDave Plauger 741ca3e8d88SDave Plauger /* 742ca3e8d88SDave Plauger * Set/test bitmap for a CBUF_MAPSIZE range which includes pfn. The 743ca3e8d88SDave Plauger * mapping of pfn to range index is imperfect because pfn and bitnum 744ca3e8d88SDave Plauger * do not have the same phase. To make sure a CBUF_MAPSIZE range is 745ca3e8d88SDave Plauger * covered, call this for both ends: 746ca3e8d88SDave Plauger * dump_set_used(base) 747ca3e8d88SDave Plauger * dump_set_used(base+CBUF_MAPNP-1) 748ca3e8d88SDave Plauger * 749ca3e8d88SDave Plauger * This is used during a panic dump to mark pages allocated by 750ca3e8d88SDave Plauger * dumpsys_get_maxmem(). The macro IS_DUMP_PAGE(pp) is used by 751ca3e8d88SDave Plauger * page_get_mnode_freelist() to make sure pages used by dump are never 752ca3e8d88SDave Plauger * allocated. 753ca3e8d88SDave Plauger */ 754ca3e8d88SDave Plauger #define CBUF_MAPP2R(pfn) ((pfn) >> (CBUF_MAPSHIFT - PAGESHIFT)) 755ca3e8d88SDave Plauger 756ca3e8d88SDave Plauger static void 757ca3e8d88SDave Plauger dump_set_used(pfn_t pfn) 758ca3e8d88SDave Plauger { 759ca3e8d88SDave Plauger 760ca3e8d88SDave Plauger pgcnt_t bitnum, rbitnum; 761ca3e8d88SDave Plauger 762ca3e8d88SDave Plauger bitnum = dump_pfn_to_bitnum(pfn); 763ca3e8d88SDave Plauger ASSERT(bitnum != (pgcnt_t)-1); 764ca3e8d88SDave Plauger 765ca3e8d88SDave Plauger rbitnum = CBUF_MAPP2R(bitnum); 766ca3e8d88SDave Plauger ASSERT(rbitnum < dumpcfg.rbitmapsize); 767ca3e8d88SDave Plauger 768ca3e8d88SDave Plauger BT_SET(dumpcfg.rbitmap, rbitnum); 769ca3e8d88SDave Plauger } 770ca3e8d88SDave Plauger 771ca3e8d88SDave Plauger int 772ca3e8d88SDave Plauger dump_test_used(pfn_t pfn) 773ca3e8d88SDave Plauger { 774ca3e8d88SDave Plauger pgcnt_t bitnum, rbitnum; 775ca3e8d88SDave Plauger 776ca3e8d88SDave Plauger bitnum = dump_pfn_to_bitnum(pfn); 777ca3e8d88SDave Plauger ASSERT(bitnum != (pgcnt_t)-1); 778ca3e8d88SDave Plauger 779ca3e8d88SDave Plauger rbitnum = CBUF_MAPP2R(bitnum); 780ca3e8d88SDave Plauger ASSERT(rbitnum < dumpcfg.rbitmapsize); 781ca3e8d88SDave Plauger 782ca3e8d88SDave Plauger return (BT_TEST(dumpcfg.rbitmap, rbitnum)); 783ca3e8d88SDave Plauger } 784ca3e8d88SDave Plauger 785ca3e8d88SDave Plauger /* 786ca3e8d88SDave Plauger * dumpbzalloc and dumpbzfree are callbacks from the bzip2 library. 787ca3e8d88SDave Plauger * dumpsys_get_maxmem() uses them for BZ2_bzCompressInit(). 788ca3e8d88SDave Plauger */ 789ca3e8d88SDave Plauger static void * 790ca3e8d88SDave Plauger dumpbzalloc(void *opaque, int items, int size) 791ca3e8d88SDave Plauger { 792ca3e8d88SDave Plauger size_t *sz; 793ca3e8d88SDave Plauger char *ret; 794ca3e8d88SDave Plauger 795ca3e8d88SDave Plauger ASSERT(opaque != NULL); 796ca3e8d88SDave Plauger sz = opaque; 797ca3e8d88SDave Plauger ret = dumpcfg.maxvm + *sz; 798ca3e8d88SDave Plauger *sz += items * size; 799ca3e8d88SDave Plauger *sz = P2ROUNDUP(*sz, BZ2_BZALLOC_ALIGN); 800ca3e8d88SDave Plauger ASSERT(*sz <= dumpcfg.maxvmsize); 801ca3e8d88SDave Plauger return (ret); 802ca3e8d88SDave Plauger } 803ca3e8d88SDave Plauger 804ca3e8d88SDave Plauger /*ARGSUSED*/ 805ca3e8d88SDave Plauger static void 806ca3e8d88SDave Plauger dumpbzfree(void *opaque, void *addr) 807ca3e8d88SDave Plauger { 808ca3e8d88SDave Plauger } 809ca3e8d88SDave Plauger 810ca3e8d88SDave Plauger /* 811ca3e8d88SDave Plauger * Perform additional checks on the page to see if we can really use 812ca3e8d88SDave Plauger * it. The kernel (kas) pages are always set in the bitmap. However, 813ca3e8d88SDave Plauger * boot memory pages (prom_ppages or P_BOOTPAGES) are not in the 814ca3e8d88SDave Plauger * bitmap. So we check for them. 815ca3e8d88SDave Plauger */ 816ca3e8d88SDave Plauger static inline int 817ca3e8d88SDave Plauger dump_pfn_check(pfn_t pfn) 818ca3e8d88SDave Plauger { 819ca3e8d88SDave Plauger page_t *pp = page_numtopp_nolock(pfn); 820ca3e8d88SDave Plauger if (pp == NULL || pp->p_pagenum != pfn || 821ca3e8d88SDave Plauger #if defined(__sparc) 822af4c679fSSean McEnroe pp->p_vnode == &promvp || 823ca3e8d88SDave Plauger #else 824ca3e8d88SDave Plauger PP_ISBOOTPAGES(pp) || 825ca3e8d88SDave Plauger #endif 826ca3e8d88SDave Plauger pp->p_toxic != 0) 827ca3e8d88SDave Plauger return (0); 828ca3e8d88SDave Plauger return (1); 829ca3e8d88SDave Plauger } 830ca3e8d88SDave Plauger 831ca3e8d88SDave Plauger /* 832ca3e8d88SDave Plauger * Check a range to see if all contained pages are available and 833ca3e8d88SDave Plauger * return non-zero if the range can be used. 834ca3e8d88SDave Plauger */ 835ca3e8d88SDave Plauger static inline int 836ca3e8d88SDave Plauger dump_range_check(pgcnt_t start, pgcnt_t end, pfn_t pfn) 837ca3e8d88SDave Plauger { 838ca3e8d88SDave Plauger for (; start < end; start++, pfn++) { 839ca3e8d88SDave Plauger if (BT_TEST(dumpcfg.bitmap, start)) 840ca3e8d88SDave Plauger return (0); 841ca3e8d88SDave Plauger if (!dump_pfn_check(pfn)) 842ca3e8d88SDave Plauger return (0); 843ca3e8d88SDave Plauger } 844ca3e8d88SDave Plauger return (1); 845ca3e8d88SDave Plauger } 846ca3e8d88SDave Plauger 847ca3e8d88SDave Plauger /* 848ca3e8d88SDave Plauger * dumpsys_get_maxmem() is called during panic. Find unused ranges 849ca3e8d88SDave Plauger * and use them for buffers. If we find enough memory switch to 850ca3e8d88SDave Plauger * parallel bzip2, otherwise use parallel lzjb. 851ca3e8d88SDave Plauger * 852ca3e8d88SDave Plauger * It searches the dump bitmap in 2 passes. The first time it looks 853ca3e8d88SDave Plauger * for CBUF_MAPSIZE ranges. On the second pass it uses small pages. 854ca3e8d88SDave Plauger */ 855ca3e8d88SDave Plauger static void 856ca3e8d88SDave Plauger dumpsys_get_maxmem() 857ca3e8d88SDave Plauger { 858ca3e8d88SDave Plauger dumpcfg_t *cfg = &dumpcfg; 859ca3e8d88SDave Plauger cbuf_t *endcp = &cfg->cbuf[cfg->ncbuf]; 860ca3e8d88SDave Plauger helper_t *endhp = &cfg->helper[cfg->nhelper]; 861ca3e8d88SDave Plauger pgcnt_t bitnum, end; 862ca3e8d88SDave Plauger size_t sz, endsz, bz2size; 863ca3e8d88SDave Plauger pfn_t pfn, off; 864ca3e8d88SDave Plauger cbuf_t *cp; 865ca3e8d88SDave Plauger helper_t *hp, *ohp; 866ca3e8d88SDave Plauger dumpmlw_t mlw; 867ca3e8d88SDave Plauger int k; 868ca3e8d88SDave Plauger 869ca3e8d88SDave Plauger if (cfg->maxsize == 0 || cfg->clevel < DUMP_CLEVEL_LZJB || 870*86f21945SDave Plauger (dump_conflags & DUMP_ALL) != 0) { 871*86f21945SDave Plauger if (cfg->clevel > DUMP_CLEVEL_LZJB) 872*86f21945SDave Plauger cfg->clevel = DUMP_CLEVEL_LZJB; 873ca3e8d88SDave Plauger return; 874*86f21945SDave Plauger } 875ca3e8d88SDave Plauger 876ca3e8d88SDave Plauger sz = 0; 877ca3e8d88SDave Plauger cfg->found4m = 0; 878ca3e8d88SDave Plauger cfg->foundsm = 0; 879ca3e8d88SDave Plauger 880ca3e8d88SDave Plauger /* bitmap of ranges used to estimate which pfns are being used */ 881ca3e8d88SDave Plauger bzero(dumpcfg.rbitmap, BT_SIZEOFMAP(dumpcfg.rbitmapsize)); 882ca3e8d88SDave Plauger 883ca3e8d88SDave Plauger /* find ranges that are not being dumped to use for buffers */ 884ca3e8d88SDave Plauger dump_init_memlist_walker(&mlw); 885ca3e8d88SDave Plauger for (bitnum = 0; bitnum < dumpcfg.bitmapsize; bitnum = end) { 886ca3e8d88SDave Plauger dump_timeleft = dump_timeout; 887ca3e8d88SDave Plauger end = bitnum + CBUF_MAPNP; 888ca3e8d88SDave Plauger pfn = dump_bitnum_to_pfn(bitnum, &mlw); 889ca3e8d88SDave Plauger ASSERT(pfn != PFN_INVALID); 890ca3e8d88SDave Plauger 891ca3e8d88SDave Plauger /* skip partial range at end of mem segment */ 892ca3e8d88SDave Plauger if (mlw.mpleft < CBUF_MAPNP) { 893ca3e8d88SDave Plauger end = bitnum + mlw.mpleft; 894ca3e8d88SDave Plauger continue; 895ca3e8d88SDave Plauger } 896ca3e8d88SDave Plauger 897ca3e8d88SDave Plauger /* skip non aligned pages */ 898ca3e8d88SDave Plauger off = P2PHASE(pfn, CBUF_MAPNP); 899ca3e8d88SDave Plauger if (off != 0) { 900ca3e8d88SDave Plauger end -= off; 901ca3e8d88SDave Plauger continue; 902ca3e8d88SDave Plauger } 903ca3e8d88SDave Plauger 904ca3e8d88SDave Plauger if (!dump_range_check(bitnum, end, pfn)) 905ca3e8d88SDave Plauger continue; 906ca3e8d88SDave Plauger 907ca3e8d88SDave Plauger ASSERT((sz + CBUF_MAPSIZE) <= cfg->maxvmsize); 908ca3e8d88SDave Plauger hat_devload(kas.a_hat, cfg->maxvm + sz, CBUF_MAPSIZE, pfn, 909ca3e8d88SDave Plauger PROT_READ | PROT_WRITE, HAT_LOAD_NOCONSIST); 910ca3e8d88SDave Plauger sz += CBUF_MAPSIZE; 911ca3e8d88SDave Plauger cfg->found4m++; 912ca3e8d88SDave Plauger 913ca3e8d88SDave Plauger /* set the bitmap for both ends to be sure to cover the range */ 914ca3e8d88SDave Plauger dump_set_used(pfn); 915ca3e8d88SDave Plauger dump_set_used(pfn + CBUF_MAPNP - 1); 916ca3e8d88SDave Plauger 917ca3e8d88SDave Plauger if (sz >= cfg->maxsize) 918ca3e8d88SDave Plauger goto foundmax; 919ca3e8d88SDave Plauger } 920ca3e8d88SDave Plauger 921ca3e8d88SDave Plauger /* Add small pages if we can't find enough large pages. */ 922ca3e8d88SDave Plauger dump_init_memlist_walker(&mlw); 923ca3e8d88SDave Plauger for (bitnum = 0; bitnum < dumpcfg.bitmapsize; bitnum = end) { 924ca3e8d88SDave Plauger dump_timeleft = dump_timeout; 925ca3e8d88SDave Plauger end = bitnum + CBUF_MAPNP; 926ca3e8d88SDave Plauger pfn = dump_bitnum_to_pfn(bitnum, &mlw); 927ca3e8d88SDave Plauger ASSERT(pfn != PFN_INVALID); 928ca3e8d88SDave Plauger 929ca3e8d88SDave Plauger /* Find any non-aligned pages at start and end of segment. */ 930ca3e8d88SDave Plauger off = P2PHASE(pfn, CBUF_MAPNP); 931ca3e8d88SDave Plauger if (mlw.mpleft < CBUF_MAPNP) { 932ca3e8d88SDave Plauger end = bitnum + mlw.mpleft; 933ca3e8d88SDave Plauger } else if (off != 0) { 934ca3e8d88SDave Plauger end -= off; 935ca3e8d88SDave Plauger } else if (cfg->found4m && dump_test_used(pfn)) { 936ca3e8d88SDave Plauger continue; 937ca3e8d88SDave Plauger } 938ca3e8d88SDave Plauger 939ca3e8d88SDave Plauger for (; bitnum < end; bitnum++, pfn++) { 940ca3e8d88SDave Plauger dump_timeleft = dump_timeout; 941ca3e8d88SDave Plauger if (BT_TEST(dumpcfg.bitmap, bitnum)) 942ca3e8d88SDave Plauger continue; 943ca3e8d88SDave Plauger if (!dump_pfn_check(pfn)) 944ca3e8d88SDave Plauger continue; 945ca3e8d88SDave Plauger ASSERT((sz + PAGESIZE) <= cfg->maxvmsize); 946ca3e8d88SDave Plauger hat_devload(kas.a_hat, cfg->maxvm + sz, PAGESIZE, pfn, 947ca3e8d88SDave Plauger PROT_READ | PROT_WRITE, HAT_LOAD_NOCONSIST); 948ca3e8d88SDave Plauger sz += PAGESIZE; 949ca3e8d88SDave Plauger cfg->foundsm++; 950ca3e8d88SDave Plauger dump_set_used(pfn); 951ca3e8d88SDave Plauger if (sz >= cfg->maxsize) 952ca3e8d88SDave Plauger goto foundmax; 953ca3e8d88SDave Plauger } 954ca3e8d88SDave Plauger } 955ca3e8d88SDave Plauger 956ca3e8d88SDave Plauger /* Fall back to lzjb if we did not get enough memory for bzip2. */ 957ca3e8d88SDave Plauger endsz = (cfg->maxsize * cfg->threshold) / cfg->nhelper; 958ca3e8d88SDave Plauger if (sz < endsz) { 959ca3e8d88SDave Plauger cfg->clevel = DUMP_CLEVEL_LZJB; 960ca3e8d88SDave Plauger } 961ca3e8d88SDave Plauger 962ca3e8d88SDave Plauger /* Allocate memory for as many helpers as we can. */ 963ca3e8d88SDave Plauger foundmax: 964ca3e8d88SDave Plauger 965ca3e8d88SDave Plauger /* Byte offsets into memory found and mapped above */ 966ca3e8d88SDave Plauger endsz = sz; 967ca3e8d88SDave Plauger sz = 0; 968ca3e8d88SDave Plauger 969ca3e8d88SDave Plauger /* Set the size for bzip2 state. Only bzip2 needs it. */ 970ca3e8d88SDave Plauger bz2size = BZ2_bzCompressInitSize(dump_bzip2_level); 971ca3e8d88SDave Plauger 972ca3e8d88SDave Plauger /* Skip the preallocate output buffers. */ 973ca3e8d88SDave Plauger cp = &cfg->cbuf[MINCBUFS]; 974ca3e8d88SDave Plauger 975ca3e8d88SDave Plauger /* Use this to move memory up from the preallocated helpers. */ 976ca3e8d88SDave Plauger ohp = cfg->helper; 977ca3e8d88SDave Plauger 978ca3e8d88SDave Plauger /* Loop over all helpers and allocate memory. */ 979ca3e8d88SDave Plauger for (hp = cfg->helper; hp < endhp; hp++) { 980ca3e8d88SDave Plauger 981ca3e8d88SDave Plauger /* Skip preallocated helpers by checking hp->page. */ 982ca3e8d88SDave Plauger if (hp->page == NULL) { 983ca3e8d88SDave Plauger if (cfg->clevel <= DUMP_CLEVEL_LZJB) { 984ca3e8d88SDave Plauger /* lzjb needs 2 1-page buffers */ 985ca3e8d88SDave Plauger if ((sz + (2 * PAGESIZE)) > endsz) 986ca3e8d88SDave Plauger break; 987ca3e8d88SDave Plauger hp->page = cfg->maxvm + sz; 988ca3e8d88SDave Plauger sz += PAGESIZE; 989ca3e8d88SDave Plauger hp->lzbuf = cfg->maxvm + sz; 990ca3e8d88SDave Plauger sz += PAGESIZE; 991ca3e8d88SDave Plauger 992ca3e8d88SDave Plauger } else if (ohp->lzbuf != NULL) { 993ca3e8d88SDave Plauger /* re-use the preallocted lzjb page for bzip2 */ 994ca3e8d88SDave Plauger hp->page = ohp->lzbuf; 995ca3e8d88SDave Plauger ohp->lzbuf = NULL; 996ca3e8d88SDave Plauger ++ohp; 997ca3e8d88SDave Plauger 998ca3e8d88SDave Plauger } else { 999ca3e8d88SDave Plauger /* bzip2 needs a 1-page buffer */ 1000ca3e8d88SDave Plauger if ((sz + PAGESIZE) > endsz) 1001ca3e8d88SDave Plauger break; 1002ca3e8d88SDave Plauger hp->page = cfg->maxvm + sz; 1003ca3e8d88SDave Plauger sz += PAGESIZE; 1004ca3e8d88SDave Plauger } 1005ca3e8d88SDave Plauger } 1006ca3e8d88SDave Plauger 1007ca3e8d88SDave Plauger /* 1008ca3e8d88SDave Plauger * Add output buffers per helper. The number of 1009ca3e8d88SDave Plauger * buffers per helper is determined by the ratio of 1010ca3e8d88SDave Plauger * ncbuf to nhelper. 1011ca3e8d88SDave Plauger */ 1012ca3e8d88SDave Plauger for (k = 0; cp < endcp && (sz + CBUF_SIZE) <= endsz && 1013ca3e8d88SDave Plauger k < NCBUF_PER_HELPER; k++) { 1014ca3e8d88SDave Plauger cp->state = CBUF_FREEBUF; 1015ca3e8d88SDave Plauger cp->size = CBUF_SIZE; 1016ca3e8d88SDave Plauger cp->buf = cfg->maxvm + sz; 1017ca3e8d88SDave Plauger sz += CBUF_SIZE; 1018ca3e8d88SDave Plauger ++cp; 1019ca3e8d88SDave Plauger } 1020ca3e8d88SDave Plauger 1021ca3e8d88SDave Plauger /* 1022ca3e8d88SDave Plauger * bzip2 needs compression state. Use the dumpbzalloc 1023ca3e8d88SDave Plauger * and dumpbzfree callbacks to allocate the memory. 1024ca3e8d88SDave Plauger * bzip2 does allocation only at init time. 1025ca3e8d88SDave Plauger */ 1026ca3e8d88SDave Plauger if (cfg->clevel >= DUMP_CLEVEL_BZIP2) { 1027ca3e8d88SDave Plauger if ((sz + bz2size) > endsz) { 1028ca3e8d88SDave Plauger hp->page = NULL; 1029ca3e8d88SDave Plauger break; 1030ca3e8d88SDave Plauger } else { 1031ca3e8d88SDave Plauger hp->bzstream.opaque = &sz; 1032ca3e8d88SDave Plauger hp->bzstream.bzalloc = dumpbzalloc; 1033ca3e8d88SDave Plauger hp->bzstream.bzfree = dumpbzfree; 1034ca3e8d88SDave Plauger (void) BZ2_bzCompressInit(&hp->bzstream, 1035ca3e8d88SDave Plauger dump_bzip2_level, 0, 0); 1036ca3e8d88SDave Plauger hp->bzstream.opaque = NULL; 1037ca3e8d88SDave Plauger } 1038ca3e8d88SDave Plauger } 1039ca3e8d88SDave Plauger } 1040ca3e8d88SDave Plauger 1041ca3e8d88SDave Plauger /* Finish allocating output buffers */ 1042ca3e8d88SDave Plauger for (; cp < endcp && (sz + CBUF_SIZE) <= endsz; cp++) { 1043ca3e8d88SDave Plauger cp->state = CBUF_FREEBUF; 1044ca3e8d88SDave Plauger cp->size = CBUF_SIZE; 1045ca3e8d88SDave Plauger cp->buf = cfg->maxvm + sz; 1046ca3e8d88SDave Plauger sz += CBUF_SIZE; 1047ca3e8d88SDave Plauger } 1048ca3e8d88SDave Plauger 1049ca3e8d88SDave Plauger /* Enable IS_DUMP_PAGE macro, which checks for pages we took. */ 1050ca3e8d88SDave Plauger if (cfg->found4m || cfg->foundsm) 1051ca3e8d88SDave Plauger dump_check_used = 1; 1052ca3e8d88SDave Plauger 1053ca3e8d88SDave Plauger ASSERT(sz <= endsz); 1054ca3e8d88SDave Plauger } 1055ca3e8d88SDave Plauger 10567c478bd9Sstevel@tonic-gate static void 10577c478bd9Sstevel@tonic-gate dumphdr_init(void) 10587c478bd9Sstevel@tonic-gate { 10597c478bd9Sstevel@tonic-gate pgcnt_t npages = 0; 10607c478bd9Sstevel@tonic-gate 10617c478bd9Sstevel@tonic-gate ASSERT(MUTEX_HELD(&dump_lock)); 10627c478bd9Sstevel@tonic-gate 10637c478bd9Sstevel@tonic-gate if (dumphdr == NULL) { 10647c478bd9Sstevel@tonic-gate dumphdr = kmem_zalloc(sizeof (dumphdr_t), KM_SLEEP); 10657c478bd9Sstevel@tonic-gate dumphdr->dump_magic = DUMP_MAGIC; 10667c478bd9Sstevel@tonic-gate dumphdr->dump_version = DUMP_VERSION; 10677c478bd9Sstevel@tonic-gate dumphdr->dump_wordsize = DUMP_WORDSIZE; 10687c478bd9Sstevel@tonic-gate dumphdr->dump_pageshift = PAGESHIFT; 10697c478bd9Sstevel@tonic-gate dumphdr->dump_pagesize = PAGESIZE; 10707c478bd9Sstevel@tonic-gate dumphdr->dump_utsname = utsname; 10717c478bd9Sstevel@tonic-gate (void) strcpy(dumphdr->dump_platform, platform); 1072ca3e8d88SDave Plauger dumpbuf.size = dumpbuf_iosize(maxphys); 1073ca3e8d88SDave Plauger dumpbuf.start = kmem_alloc(dumpbuf.size, KM_SLEEP); 1074ca3e8d88SDave Plauger dumpbuf.end = dumpbuf.start + dumpbuf.size; 1075ca3e8d88SDave Plauger dumpcfg.pids = kmem_alloc(v.v_proc * sizeof (pid_t), KM_SLEEP); 1076ca3e8d88SDave Plauger dumpcfg.helpermap = kmem_zalloc(BT_SIZEOFMAP(NCPU), KM_SLEEP); 1077ca3e8d88SDave Plauger LOCK_INIT_HELD(&dumpcfg.helper_lock); 10787c478bd9Sstevel@tonic-gate } 10797c478bd9Sstevel@tonic-gate 1080843e1988Sjohnlev npages = num_phys_pages(); 10817c478bd9Sstevel@tonic-gate 1082ca3e8d88SDave Plauger if (dumpcfg.bitmapsize != npages) { 1083ca3e8d88SDave Plauger size_t rlen = CBUF_MAPP2R(P2ROUNDUP(npages, CBUF_MAPNP)); 10847c478bd9Sstevel@tonic-gate void *map = kmem_alloc(BT_SIZEOFMAP(npages), KM_SLEEP); 1085ca3e8d88SDave Plauger void *rmap = kmem_alloc(BT_SIZEOFMAP(rlen), KM_SLEEP); 1086ca3e8d88SDave Plauger 1087ca3e8d88SDave Plauger if (dumpcfg.bitmap != NULL) 1088ca3e8d88SDave Plauger kmem_free(dumpcfg.bitmap, BT_SIZEOFMAP(dumpcfg. 1089ca3e8d88SDave Plauger bitmapsize)); 1090ca3e8d88SDave Plauger if (dumpcfg.rbitmap != NULL) 1091ca3e8d88SDave Plauger kmem_free(dumpcfg.rbitmap, BT_SIZEOFMAP(dumpcfg. 1092ca3e8d88SDave Plauger rbitmapsize)); 1093ca3e8d88SDave Plauger dumpcfg.bitmap = map; 1094ca3e8d88SDave Plauger dumpcfg.bitmapsize = npages; 1095ca3e8d88SDave Plauger dumpcfg.rbitmap = rmap; 1096ca3e8d88SDave Plauger dumpcfg.rbitmapsize = rlen; 10977c478bd9Sstevel@tonic-gate } 10987c478bd9Sstevel@tonic-gate } 10997c478bd9Sstevel@tonic-gate 11007c478bd9Sstevel@tonic-gate /* 11017c478bd9Sstevel@tonic-gate * Establish a new dump device. 11027c478bd9Sstevel@tonic-gate */ 11037c478bd9Sstevel@tonic-gate int 11047c478bd9Sstevel@tonic-gate dumpinit(vnode_t *vp, char *name, int justchecking) 11057c478bd9Sstevel@tonic-gate { 11067c478bd9Sstevel@tonic-gate vnode_t *cvp; 11077c478bd9Sstevel@tonic-gate vattr_t vattr; 11087c478bd9Sstevel@tonic-gate vnode_t *cdev_vp; 11097c478bd9Sstevel@tonic-gate int error = 0; 11107c478bd9Sstevel@tonic-gate 11117c478bd9Sstevel@tonic-gate ASSERT(MUTEX_HELD(&dump_lock)); 11127c478bd9Sstevel@tonic-gate 11137c478bd9Sstevel@tonic-gate dumphdr_init(); 11147c478bd9Sstevel@tonic-gate 11157c478bd9Sstevel@tonic-gate cvp = common_specvp(vp); 11167c478bd9Sstevel@tonic-gate if (cvp == dumpvp) 11177c478bd9Sstevel@tonic-gate return (0); 11187c478bd9Sstevel@tonic-gate 11197c478bd9Sstevel@tonic-gate /* 11207c478bd9Sstevel@tonic-gate * Determine whether this is a plausible dump device. We want either: 11217c478bd9Sstevel@tonic-gate * (1) a real device that's not mounted and has a cb_dump routine, or 11227c478bd9Sstevel@tonic-gate * (2) a swapfile on some filesystem that has a vop_dump routine. 11237c478bd9Sstevel@tonic-gate */ 1124da6c28aaSamw if ((error = VOP_OPEN(&cvp, FREAD | FWRITE, kcred, NULL)) != 0) 11257c478bd9Sstevel@tonic-gate return (error); 11267c478bd9Sstevel@tonic-gate 11277c478bd9Sstevel@tonic-gate vattr.va_mask = AT_SIZE | AT_TYPE | AT_RDEV; 1128da6c28aaSamw if ((error = VOP_GETATTR(cvp, &vattr, 0, kcred, NULL)) == 0) { 11297c478bd9Sstevel@tonic-gate if (vattr.va_type == VBLK || vattr.va_type == VCHR) { 11307c478bd9Sstevel@tonic-gate if (devopsp[getmajor(vattr.va_rdev)]-> 11317c478bd9Sstevel@tonic-gate devo_cb_ops->cb_dump == nodev) 11327c478bd9Sstevel@tonic-gate error = ENOTSUP; 11337c478bd9Sstevel@tonic-gate else if (vfs_devismounted(vattr.va_rdev)) 11347c478bd9Sstevel@tonic-gate error = EBUSY; 1135681d9761SEric Taylor if (strcmp(ddi_driver_name(VTOS(cvp)->s_dip), 1136681d9761SEric Taylor ZFS_DRIVER) == 0 && 1137681d9761SEric Taylor IS_SWAPVP(common_specvp(cvp))) 1138681d9761SEric Taylor error = EBUSY; 11397c478bd9Sstevel@tonic-gate } else { 11407c478bd9Sstevel@tonic-gate if (vn_matchopval(cvp, VOPNAME_DUMP, fs_nosys) || 11417c478bd9Sstevel@tonic-gate !IS_SWAPVP(cvp)) 11427c478bd9Sstevel@tonic-gate error = ENOTSUP; 11437c478bd9Sstevel@tonic-gate } 11447c478bd9Sstevel@tonic-gate } 11457c478bd9Sstevel@tonic-gate 11467c478bd9Sstevel@tonic-gate if (error == 0 && vattr.va_size < 2 * DUMP_LOGSIZE + DUMP_ERPTSIZE) 11477c478bd9Sstevel@tonic-gate error = ENOSPC; 11487c478bd9Sstevel@tonic-gate 11497c478bd9Sstevel@tonic-gate if (error || justchecking) { 1150da6c28aaSamw (void) VOP_CLOSE(cvp, FREAD | FWRITE, 1, (offset_t)0, 1151da6c28aaSamw kcred, NULL); 11527c478bd9Sstevel@tonic-gate return (error); 11537c478bd9Sstevel@tonic-gate } 11547c478bd9Sstevel@tonic-gate 11557c478bd9Sstevel@tonic-gate VN_HOLD(cvp); 11567c478bd9Sstevel@tonic-gate 11577c478bd9Sstevel@tonic-gate if (dumpvp != NULL) 11587c478bd9Sstevel@tonic-gate dumpfini(); /* unconfigure the old dump device */ 11597c478bd9Sstevel@tonic-gate 11607c478bd9Sstevel@tonic-gate dumpvp = cvp; 11617c478bd9Sstevel@tonic-gate dumpvp_size = vattr.va_size & -DUMP_OFFSET; 11627c478bd9Sstevel@tonic-gate dumppath = kmem_alloc(strlen(name) + 1, KM_SLEEP); 11637c478bd9Sstevel@tonic-gate (void) strcpy(dumppath, name); 1164ca3e8d88SDave Plauger dumpbuf.iosize = 0; 11657c478bd9Sstevel@tonic-gate 11667c478bd9Sstevel@tonic-gate /* 11677c478bd9Sstevel@tonic-gate * If the dump device is a block device, attempt to open up the 11687c478bd9Sstevel@tonic-gate * corresponding character device and determine its maximum transfer 11697c478bd9Sstevel@tonic-gate * size. We use this information to potentially resize dumpbuf to a 11707c478bd9Sstevel@tonic-gate * larger and more optimal size for performing i/o to the dump device. 11717c478bd9Sstevel@tonic-gate */ 11727c478bd9Sstevel@tonic-gate if (cvp->v_type == VBLK && 11737c478bd9Sstevel@tonic-gate (cdev_vp = makespecvp(VTOS(cvp)->s_dev, VCHR)) != NULL) { 1174da6c28aaSamw if (VOP_OPEN(&cdev_vp, FREAD | FWRITE, kcred, NULL) == 0) { 11757c478bd9Sstevel@tonic-gate size_t blk_size; 11767c478bd9Sstevel@tonic-gate struct dk_cinfo dki; 117765908c77Syu, larry liu - Sun Microsystems - Beijing China struct dk_minfo minf; 11787c478bd9Sstevel@tonic-gate 117965908c77Syu, larry liu - Sun Microsystems - Beijing China if (VOP_IOCTL(cdev_vp, DKIOCGMEDIAINFO, 118065908c77Syu, larry liu - Sun Microsystems - Beijing China (intptr_t)&minf, FKIOCTL, kcred, NULL, NULL) 118165908c77Syu, larry liu - Sun Microsystems - Beijing China == 0 && minf.dki_lbsize != 0) 118265908c77Syu, larry liu - Sun Microsystems - Beijing China blk_size = minf.dki_lbsize; 11837c478bd9Sstevel@tonic-gate else 11847c478bd9Sstevel@tonic-gate blk_size = DEV_BSIZE; 11857c478bd9Sstevel@tonic-gate 11867c478bd9Sstevel@tonic-gate if (VOP_IOCTL(cdev_vp, DKIOCINFO, (intptr_t)&dki, 1187da6c28aaSamw FKIOCTL, kcred, NULL, NULL) == 0) { 1188ca3e8d88SDave Plauger dumpbuf.iosize = dki.dki_maxtransfer * blk_size; 11897c478bd9Sstevel@tonic-gate dumpbuf_resize(); 11907c478bd9Sstevel@tonic-gate } 1191e7cbe64fSgw /* 1192681d9761SEric Taylor * If we are working with a zvol then dumpify it 1193681d9761SEric Taylor * if it's not being used as swap. 1194e7cbe64fSgw */ 1195e7cbe64fSgw if (strcmp(dki.dki_dname, ZVOL_DRIVER) == 0) { 1196681d9761SEric Taylor if (IS_SWAPVP(common_specvp(cvp))) 1197681d9761SEric Taylor error = EBUSY; 1198681d9761SEric Taylor else if ((error = VOP_IOCTL(cdev_vp, 1199e7cbe64fSgw DKIOCDUMPINIT, NULL, FKIOCTL, kcred, 1200681d9761SEric Taylor NULL, NULL)) != 0) 1201e7cbe64fSgw dumpfini(); 1202e7cbe64fSgw } 12037c478bd9Sstevel@tonic-gate 1204da6c28aaSamw (void) VOP_CLOSE(cdev_vp, FREAD | FWRITE, 1, 0, 1205da6c28aaSamw kcred, NULL); 12067c478bd9Sstevel@tonic-gate } 12077c478bd9Sstevel@tonic-gate 12087c478bd9Sstevel@tonic-gate VN_RELE(cdev_vp); 12097c478bd9Sstevel@tonic-gate } 12107c478bd9Sstevel@tonic-gate 12117c478bd9Sstevel@tonic-gate cmn_err(CE_CONT, "?dump on %s size %llu MB\n", name, dumpvp_size >> 20); 12127c478bd9Sstevel@tonic-gate 1213ca3e8d88SDave Plauger dump_update_clevel(); 1214ca3e8d88SDave Plauger 1215e7cbe64fSgw return (error); 12167c478bd9Sstevel@tonic-gate } 12177c478bd9Sstevel@tonic-gate 12187c478bd9Sstevel@tonic-gate void 12197c478bd9Sstevel@tonic-gate dumpfini(void) 12207c478bd9Sstevel@tonic-gate { 1221e7cbe64fSgw vattr_t vattr; 1222e7cbe64fSgw boolean_t is_zfs = B_FALSE; 1223e7cbe64fSgw vnode_t *cdev_vp; 12247c478bd9Sstevel@tonic-gate ASSERT(MUTEX_HELD(&dump_lock)); 12257c478bd9Sstevel@tonic-gate 12267c478bd9Sstevel@tonic-gate kmem_free(dumppath, strlen(dumppath) + 1); 12277c478bd9Sstevel@tonic-gate 1228e7cbe64fSgw /* 1229e7cbe64fSgw * Determine if we are using zvols for our dump device 1230e7cbe64fSgw */ 1231e7cbe64fSgw vattr.va_mask = AT_RDEV; 1232e7cbe64fSgw if (VOP_GETATTR(dumpvp, &vattr, 0, kcred, NULL) == 0) { 1233e7cbe64fSgw is_zfs = (getmajor(vattr.va_rdev) == 1234e7cbe64fSgw ddi_name_to_major(ZFS_DRIVER)) ? B_TRUE : B_FALSE; 1235e7cbe64fSgw } 1236e7cbe64fSgw 1237e7cbe64fSgw /* 1238e7cbe64fSgw * If we have a zvol dump device then we call into zfs so 1239e7cbe64fSgw * that it may have a chance to cleanup. 1240e7cbe64fSgw */ 1241e7cbe64fSgw if (is_zfs && 1242e7cbe64fSgw (cdev_vp = makespecvp(VTOS(dumpvp)->s_dev, VCHR)) != NULL) { 1243e7cbe64fSgw if (VOP_OPEN(&cdev_vp, FREAD | FWRITE, kcred, NULL) == 0) { 1244e7cbe64fSgw (void) VOP_IOCTL(cdev_vp, DKIOCDUMPFINI, NULL, FKIOCTL, 1245e7cbe64fSgw kcred, NULL, NULL); 1246e7cbe64fSgw (void) VOP_CLOSE(cdev_vp, FREAD | FWRITE, 1, 0, 1247e7cbe64fSgw kcred, NULL); 1248e7cbe64fSgw } 1249e7cbe64fSgw VN_RELE(cdev_vp); 1250e7cbe64fSgw } 1251e7cbe64fSgw 1252da6c28aaSamw (void) VOP_CLOSE(dumpvp, FREAD | FWRITE, 1, (offset_t)0, kcred, NULL); 12537c478bd9Sstevel@tonic-gate 12547c478bd9Sstevel@tonic-gate VN_RELE(dumpvp); 12557c478bd9Sstevel@tonic-gate 12567c478bd9Sstevel@tonic-gate dumpvp = NULL; 12577c478bd9Sstevel@tonic-gate dumpvp_size = 0; 12587c478bd9Sstevel@tonic-gate dumppath = NULL; 12597c478bd9Sstevel@tonic-gate } 12607c478bd9Sstevel@tonic-gate 1261ca3e8d88SDave Plauger static offset_t 1262ca3e8d88SDave Plauger dumpvp_flush(void) 12637c478bd9Sstevel@tonic-gate { 1264ca3e8d88SDave Plauger size_t size = P2ROUNDUP(dumpbuf.cur - dumpbuf.start, PAGESIZE); 1265ca3e8d88SDave Plauger hrtime_t iotime; 1266ca3e8d88SDave Plauger int err; 12677c478bd9Sstevel@tonic-gate 1268ca3e8d88SDave Plauger if (dumpbuf.vp_off + size > dumpbuf.vp_limit) { 1269ca3e8d88SDave Plauger dump_ioerr = ENOSPC; 1270ca3e8d88SDave Plauger dumpbuf.vp_off = dumpbuf.vp_limit; 1271ca3e8d88SDave Plauger } else if (size != 0) { 1272ca3e8d88SDave Plauger iotime = gethrtime(); 1273ca3e8d88SDave Plauger dumpsync.iowait += iotime - dumpsync.iowaitts; 1274ca3e8d88SDave Plauger if (panicstr) 1275ca3e8d88SDave Plauger err = VOP_DUMP(dumpvp, dumpbuf.start, 1276ca3e8d88SDave Plauger lbtodb(dumpbuf.vp_off), btod(size), NULL); 1277ca3e8d88SDave Plauger else 1278ca3e8d88SDave Plauger err = vn_rdwr(UIO_WRITE, dumpbuf.cdev_vp != NULL ? 1279ca3e8d88SDave Plauger dumpbuf.cdev_vp : dumpvp, dumpbuf.start, size, 1280ca3e8d88SDave Plauger dumpbuf.vp_off, UIO_SYSSPACE, 0, dumpbuf.vp_limit, 1281ca3e8d88SDave Plauger kcred, 0); 1282ca3e8d88SDave Plauger if (err && dump_ioerr == 0) 1283ca3e8d88SDave Plauger dump_ioerr = err; 1284ca3e8d88SDave Plauger dumpsync.iowaitts = gethrtime(); 1285ca3e8d88SDave Plauger dumpsync.iotime += dumpsync.iowaitts - iotime; 1286ca3e8d88SDave Plauger dumpsync.nwrite += size; 1287ca3e8d88SDave Plauger dumpbuf.vp_off += size; 12887c478bd9Sstevel@tonic-gate } 1289ca3e8d88SDave Plauger dumpbuf.cur = dumpbuf.start; 1290ca3e8d88SDave Plauger dump_timeleft = dump_timeout; 1291ca3e8d88SDave Plauger return (dumpbuf.vp_off); 12927c478bd9Sstevel@tonic-gate } 12937c478bd9Sstevel@tonic-gate 1294ca3e8d88SDave Plauger /* maximize write speed by keeping seek offset aligned with size */ 1295ca3e8d88SDave Plauger void 1296ca3e8d88SDave Plauger dumpvp_write(const void *va, size_t size) 12977c478bd9Sstevel@tonic-gate { 1298ca3e8d88SDave Plauger size_t len, off, sz; 12997c478bd9Sstevel@tonic-gate 1300ca3e8d88SDave Plauger while (size != 0) { 1301ca3e8d88SDave Plauger len = MIN(size, dumpbuf.end - dumpbuf.cur); 1302ca3e8d88SDave Plauger if (len == 0) { 1303ca3e8d88SDave Plauger off = P2PHASE(dumpbuf.vp_off, dumpbuf.size); 1304ca3e8d88SDave Plauger if (off == 0 || !ISP2(dumpbuf.size)) { 1305ca3e8d88SDave Plauger (void) dumpvp_flush(); 1306ca3e8d88SDave Plauger } else { 1307ca3e8d88SDave Plauger sz = dumpbuf.size - off; 1308ca3e8d88SDave Plauger dumpbuf.cur = dumpbuf.start + sz; 1309ca3e8d88SDave Plauger (void) dumpvp_flush(); 1310ca3e8d88SDave Plauger ovbcopy(dumpbuf.start + sz, dumpbuf.start, off); 1311ca3e8d88SDave Plauger dumpbuf.cur += off; 1312ca3e8d88SDave Plauger } 1313ca3e8d88SDave Plauger } else { 1314ca3e8d88SDave Plauger bcopy(va, dumpbuf.cur, len); 1315ca3e8d88SDave Plauger va = (char *)va + len; 1316ca3e8d88SDave Plauger dumpbuf.cur += len; 1317ca3e8d88SDave Plauger size -= len; 1318ca3e8d88SDave Plauger } 13197c478bd9Sstevel@tonic-gate } 13207c478bd9Sstevel@tonic-gate } 13217c478bd9Sstevel@tonic-gate 1322ca3e8d88SDave Plauger /*ARGSUSED*/ 1323ca3e8d88SDave Plauger static void 1324ca3e8d88SDave Plauger dumpvp_ksyms_write(const void *src, void *dst, size_t size) 13257c478bd9Sstevel@tonic-gate { 1326ca3e8d88SDave Plauger dumpvp_write(src, size); 1327ca3e8d88SDave Plauger } 13287c478bd9Sstevel@tonic-gate 1329ca3e8d88SDave Plauger /* 1330ca3e8d88SDave Plauger * Mark 'pfn' in the bitmap and dump its translation table entry. 1331ca3e8d88SDave Plauger */ 1332ca3e8d88SDave Plauger void 1333ca3e8d88SDave Plauger dump_addpage(struct as *as, void *va, pfn_t pfn) 1334ca3e8d88SDave Plauger { 1335ca3e8d88SDave Plauger mem_vtop_t mem_vtop; 1336ca3e8d88SDave Plauger pgcnt_t bitnum; 1337ca3e8d88SDave Plauger 1338ca3e8d88SDave Plauger if ((bitnum = dump_pfn_to_bitnum(pfn)) != (pgcnt_t)-1) { 1339ca3e8d88SDave Plauger if (!BT_TEST(dumpcfg.bitmap, bitnum)) { 1340ca3e8d88SDave Plauger dumphdr->dump_npages++; 1341ca3e8d88SDave Plauger BT_SET(dumpcfg.bitmap, bitnum); 1342ca3e8d88SDave Plauger } 1343ca3e8d88SDave Plauger dumphdr->dump_nvtop++; 1344ca3e8d88SDave Plauger mem_vtop.m_as = as; 1345ca3e8d88SDave Plauger mem_vtop.m_va = va; 1346ca3e8d88SDave Plauger mem_vtop.m_pfn = pfn; 1347ca3e8d88SDave Plauger dumpvp_write(&mem_vtop, sizeof (mem_vtop_t)); 1348ca3e8d88SDave Plauger } 1349ca3e8d88SDave Plauger dump_timeleft = dump_timeout; 1350ca3e8d88SDave Plauger } 1351ca3e8d88SDave Plauger 1352ca3e8d88SDave Plauger /* 1353ca3e8d88SDave Plauger * Mark 'pfn' in the bitmap 1354ca3e8d88SDave Plauger */ 1355ca3e8d88SDave Plauger void 1356ca3e8d88SDave Plauger dump_page(pfn_t pfn) 1357ca3e8d88SDave Plauger { 1358ca3e8d88SDave Plauger pgcnt_t bitnum; 1359ca3e8d88SDave Plauger 1360ca3e8d88SDave Plauger if ((bitnum = dump_pfn_to_bitnum(pfn)) != (pgcnt_t)-1) { 1361ca3e8d88SDave Plauger if (!BT_TEST(dumpcfg.bitmap, bitnum)) { 1362ca3e8d88SDave Plauger dumphdr->dump_npages++; 1363ca3e8d88SDave Plauger BT_SET(dumpcfg.bitmap, bitnum); 1364ca3e8d88SDave Plauger } 1365ca3e8d88SDave Plauger } 1366ca3e8d88SDave Plauger dump_timeleft = dump_timeout; 1367ca3e8d88SDave Plauger } 1368ca3e8d88SDave Plauger 1369ca3e8d88SDave Plauger /* 1370ca3e8d88SDave Plauger * Dump the <as, va, pfn> information for a given address space. 1371ca3e8d88SDave Plauger * SEGOP_DUMP() will call dump_addpage() for each page in the segment. 1372ca3e8d88SDave Plauger */ 1373ca3e8d88SDave Plauger static void 1374ca3e8d88SDave Plauger dump_as(struct as *as) 1375ca3e8d88SDave Plauger { 1376ca3e8d88SDave Plauger struct seg *seg; 1377ca3e8d88SDave Plauger 1378ca3e8d88SDave Plauger AS_LOCK_ENTER(as, &as->a_lock, RW_READER); 1379ca3e8d88SDave Plauger for (seg = AS_SEGFIRST(as); seg; seg = AS_SEGNEXT(as, seg)) { 1380ca3e8d88SDave Plauger if (seg->s_as != as) 1381ca3e8d88SDave Plauger break; 1382ca3e8d88SDave Plauger if (seg->s_ops == NULL) 1383ca3e8d88SDave Plauger continue; 1384ca3e8d88SDave Plauger SEGOP_DUMP(seg); 1385ca3e8d88SDave Plauger } 1386ca3e8d88SDave Plauger AS_LOCK_EXIT(as, &as->a_lock); 1387ca3e8d88SDave Plauger 1388ca3e8d88SDave Plauger if (seg != NULL) 1389ca3e8d88SDave Plauger cmn_err(CE_WARN, "invalid segment %p in address space %p", 1390ca3e8d88SDave Plauger (void *)seg, (void *)as); 1391ca3e8d88SDave Plauger } 1392ca3e8d88SDave Plauger 1393ca3e8d88SDave Plauger static int 1394ca3e8d88SDave Plauger dump_process(pid_t pid) 1395ca3e8d88SDave Plauger { 1396ca3e8d88SDave Plauger proc_t *p = sprlock(pid); 1397ca3e8d88SDave Plauger 1398ca3e8d88SDave Plauger if (p == NULL) 1399ca3e8d88SDave Plauger return (-1); 1400ca3e8d88SDave Plauger if (p->p_as != &kas) { 1401ca3e8d88SDave Plauger mutex_exit(&p->p_lock); 1402ca3e8d88SDave Plauger dump_as(p->p_as); 1403ca3e8d88SDave Plauger mutex_enter(&p->p_lock); 1404ca3e8d88SDave Plauger } 1405ca3e8d88SDave Plauger 1406ca3e8d88SDave Plauger sprunlock(p); 1407ca3e8d88SDave Plauger 1408ca3e8d88SDave Plauger return (0); 1409ca3e8d88SDave Plauger } 1410ca3e8d88SDave Plauger 1411ca3e8d88SDave Plauger void 1412ca3e8d88SDave Plauger dump_ereports(void) 1413ca3e8d88SDave Plauger { 1414ca3e8d88SDave Plauger u_offset_t dumpvp_start; 1415ca3e8d88SDave Plauger erpt_dump_t ed; 1416ca3e8d88SDave Plauger 1417ca3e8d88SDave Plauger if (dumpvp == NULL || dumphdr == NULL) 1418ca3e8d88SDave Plauger return; 1419ca3e8d88SDave Plauger 1420ca3e8d88SDave Plauger dumpbuf.cur = dumpbuf.start; 1421ca3e8d88SDave Plauger dumpbuf.vp_limit = dumpvp_size - (DUMP_OFFSET + DUMP_LOGSIZE); 1422ca3e8d88SDave Plauger dumpvp_start = dumpbuf.vp_limit - DUMP_ERPTSIZE; 1423ca3e8d88SDave Plauger dumpbuf.vp_off = dumpvp_start; 1424ca3e8d88SDave Plauger 1425ca3e8d88SDave Plauger fm_ereport_dump(); 1426ca3e8d88SDave Plauger if (panicstr) 1427ca3e8d88SDave Plauger errorq_dump(); 1428ca3e8d88SDave Plauger 1429ca3e8d88SDave Plauger bzero(&ed, sizeof (ed)); /* indicate end of ereports */ 1430ca3e8d88SDave Plauger dumpvp_write(&ed, sizeof (ed)); 1431ca3e8d88SDave Plauger (void) dumpvp_flush(); 1432ca3e8d88SDave Plauger 1433ca3e8d88SDave Plauger if (!panicstr) { 1434ca3e8d88SDave Plauger (void) VOP_PUTPAGE(dumpvp, dumpvp_start, 1435ca3e8d88SDave Plauger (size_t)(dumpbuf.vp_off - dumpvp_start), 1436ca3e8d88SDave Plauger B_INVAL | B_FORCE, kcred, NULL); 1437ca3e8d88SDave Plauger } 1438ca3e8d88SDave Plauger } 1439ca3e8d88SDave Plauger 1440ca3e8d88SDave Plauger void 1441ca3e8d88SDave Plauger dump_messages(void) 1442ca3e8d88SDave Plauger { 1443ca3e8d88SDave Plauger log_dump_t ld; 1444ca3e8d88SDave Plauger mblk_t *mctl, *mdata; 1445ca3e8d88SDave Plauger queue_t *q, *qlast; 1446ca3e8d88SDave Plauger u_offset_t dumpvp_start; 1447ca3e8d88SDave Plauger 1448ca3e8d88SDave Plauger if (dumpvp == NULL || dumphdr == NULL || log_consq == NULL) 1449ca3e8d88SDave Plauger return; 1450ca3e8d88SDave Plauger 1451ca3e8d88SDave Plauger dumpbuf.cur = dumpbuf.start; 1452ca3e8d88SDave Plauger dumpbuf.vp_limit = dumpvp_size - DUMP_OFFSET; 1453ca3e8d88SDave Plauger dumpvp_start = dumpbuf.vp_limit - DUMP_LOGSIZE; 1454ca3e8d88SDave Plauger dumpbuf.vp_off = dumpvp_start; 1455ca3e8d88SDave Plauger 1456ca3e8d88SDave Plauger qlast = NULL; 1457ca3e8d88SDave Plauger do { 1458ca3e8d88SDave Plauger for (q = log_consq; q->q_next != qlast; q = q->q_next) 1459ca3e8d88SDave Plauger continue; 1460ca3e8d88SDave Plauger for (mctl = q->q_first; mctl != NULL; mctl = mctl->b_next) { 1461ca3e8d88SDave Plauger dump_timeleft = dump_timeout; 1462ca3e8d88SDave Plauger mdata = mctl->b_cont; 1463ca3e8d88SDave Plauger ld.ld_magic = LOG_MAGIC; 1464ca3e8d88SDave Plauger ld.ld_msgsize = MBLKL(mctl->b_cont); 1465ca3e8d88SDave Plauger ld.ld_csum = checksum32(mctl->b_rptr, MBLKL(mctl)); 1466ca3e8d88SDave Plauger ld.ld_msum = checksum32(mdata->b_rptr, MBLKL(mdata)); 1467ca3e8d88SDave Plauger dumpvp_write(&ld, sizeof (ld)); 1468ca3e8d88SDave Plauger dumpvp_write(mctl->b_rptr, MBLKL(mctl)); 1469ca3e8d88SDave Plauger dumpvp_write(mdata->b_rptr, MBLKL(mdata)); 1470ca3e8d88SDave Plauger } 1471ca3e8d88SDave Plauger } while ((qlast = q) != log_consq); 1472ca3e8d88SDave Plauger 1473ca3e8d88SDave Plauger ld.ld_magic = 0; /* indicate end of messages */ 1474ca3e8d88SDave Plauger dumpvp_write(&ld, sizeof (ld)); 1475ca3e8d88SDave Plauger (void) dumpvp_flush(); 1476ca3e8d88SDave Plauger if (!panicstr) { 1477ca3e8d88SDave Plauger (void) VOP_PUTPAGE(dumpvp, dumpvp_start, 1478ca3e8d88SDave Plauger (size_t)(dumpbuf.vp_off - dumpvp_start), 1479ca3e8d88SDave Plauger B_INVAL | B_FORCE, kcred, NULL); 1480ca3e8d88SDave Plauger } 1481ca3e8d88SDave Plauger } 1482ca3e8d88SDave Plauger 1483ca3e8d88SDave Plauger /* 1484ca3e8d88SDave Plauger * The following functions are called on multiple CPUs during dump. 1485ca3e8d88SDave Plauger * They must not use most kernel services, because all cross-calls are 1486ca3e8d88SDave Plauger * disabled during panic. Therefore, blocking locks and cache flushes 1487ca3e8d88SDave Plauger * will not work. 1488ca3e8d88SDave Plauger */ 1489ca3e8d88SDave Plauger 14909dd77bc8SDave Plauger /* 14919dd77bc8SDave Plauger * Copy pages, trapping ECC errors. Also, for robustness, trap data 14929dd77bc8SDave Plauger * access in case something goes wrong in the hat layer and the 14939dd77bc8SDave Plauger * mapping is broken. 14949dd77bc8SDave Plauger */ 1495ca3e8d88SDave Plauger static int 1496ca3e8d88SDave Plauger dump_pagecopy(void *src, void *dst) 1497ca3e8d88SDave Plauger { 1498ca3e8d88SDave Plauger long *wsrc = (long *)src; 1499ca3e8d88SDave Plauger long *wdst = (long *)dst; 1500ca3e8d88SDave Plauger const ulong_t ncopies = PAGESIZE / sizeof (long); 1501ca3e8d88SDave Plauger volatile int w = 0; 1502ca3e8d88SDave Plauger volatile int ueoff = -1; 1503ca3e8d88SDave Plauger on_trap_data_t otd; 1504ca3e8d88SDave Plauger 15059dd77bc8SDave Plauger if (on_trap(&otd, OT_DATA_EC | OT_DATA_ACCESS)) { 1506ca3e8d88SDave Plauger if (ueoff == -1) 1507ca3e8d88SDave Plauger ueoff = w * sizeof (long); 15089dd77bc8SDave Plauger /* report "bad ECC" or "bad address" */ 1509ca3e8d88SDave Plauger #ifdef _LP64 15109dd77bc8SDave Plauger if (otd.ot_trap & OT_DATA_EC) 15119dd77bc8SDave Plauger wdst[w++] = 0x00badecc00badecc; 15129dd77bc8SDave Plauger else 15139dd77bc8SDave Plauger wdst[w++] = 0x00badadd00badadd; 1514ca3e8d88SDave Plauger #else 15159dd77bc8SDave Plauger if (otd.ot_trap & OT_DATA_EC) 15169dd77bc8SDave Plauger wdst[w++] = 0x00badecc; 15179dd77bc8SDave Plauger else 15189dd77bc8SDave Plauger wdst[w++] = 0x00badadd; 1519ca3e8d88SDave Plauger #endif 1520ca3e8d88SDave Plauger } 1521ca3e8d88SDave Plauger while (w < ncopies) { 1522ca3e8d88SDave Plauger wdst[w] = wsrc[w]; 1523ca3e8d88SDave Plauger w++; 1524ca3e8d88SDave Plauger } 1525ca3e8d88SDave Plauger no_trap(); 1526ca3e8d88SDave Plauger return (ueoff); 1527ca3e8d88SDave Plauger } 1528ca3e8d88SDave Plauger 1529ca3e8d88SDave Plauger static void 1530ca3e8d88SDave Plauger dumpsys_close_cq(cqueue_t *cq, int live) 1531ca3e8d88SDave Plauger { 1532ca3e8d88SDave Plauger if (live) { 1533ca3e8d88SDave Plauger mutex_enter(&cq->mutex); 1534ca3e8d88SDave Plauger atomic_dec_uint(&cq->open); 1535ca3e8d88SDave Plauger cv_signal(&cq->cv); 1536ca3e8d88SDave Plauger mutex_exit(&cq->mutex); 1537ca3e8d88SDave Plauger } else { 1538ca3e8d88SDave Plauger atomic_dec_uint(&cq->open); 1539ca3e8d88SDave Plauger } 1540ca3e8d88SDave Plauger } 1541ca3e8d88SDave Plauger 1542ca3e8d88SDave Plauger static inline void 1543ca3e8d88SDave Plauger dumpsys_spinlock(lock_t *lp) 1544ca3e8d88SDave Plauger { 1545ca3e8d88SDave Plauger uint_t backoff = 0; 1546ca3e8d88SDave Plauger int loop_count = 0; 1547ca3e8d88SDave Plauger 1548ca3e8d88SDave Plauger while (LOCK_HELD(lp) || !lock_spin_try(lp)) { 1549ca3e8d88SDave Plauger if (++loop_count >= ncpus) { 1550ca3e8d88SDave Plauger backoff = mutex_lock_backoff(0); 1551ca3e8d88SDave Plauger loop_count = 0; 1552ca3e8d88SDave Plauger } else { 1553ca3e8d88SDave Plauger backoff = mutex_lock_backoff(backoff); 1554ca3e8d88SDave Plauger } 1555ca3e8d88SDave Plauger mutex_lock_delay(backoff); 1556ca3e8d88SDave Plauger } 1557ca3e8d88SDave Plauger } 1558ca3e8d88SDave Plauger 1559ca3e8d88SDave Plauger static inline void 1560ca3e8d88SDave Plauger dumpsys_spinunlock(lock_t *lp) 1561ca3e8d88SDave Plauger { 1562ca3e8d88SDave Plauger lock_clear(lp); 1563ca3e8d88SDave Plauger } 1564ca3e8d88SDave Plauger 1565ca3e8d88SDave Plauger static inline void 1566ca3e8d88SDave Plauger dumpsys_lock(cqueue_t *cq, int live) 1567ca3e8d88SDave Plauger { 1568ca3e8d88SDave Plauger if (live) 1569ca3e8d88SDave Plauger mutex_enter(&cq->mutex); 1570ca3e8d88SDave Plauger else 1571ca3e8d88SDave Plauger dumpsys_spinlock(&cq->spinlock); 1572ca3e8d88SDave Plauger } 1573ca3e8d88SDave Plauger 1574ca3e8d88SDave Plauger static inline void 1575ca3e8d88SDave Plauger dumpsys_unlock(cqueue_t *cq, int live, int signal) 1576ca3e8d88SDave Plauger { 1577ca3e8d88SDave Plauger if (live) { 1578ca3e8d88SDave Plauger if (signal) 1579ca3e8d88SDave Plauger cv_signal(&cq->cv); 1580ca3e8d88SDave Plauger mutex_exit(&cq->mutex); 1581ca3e8d88SDave Plauger } else { 1582ca3e8d88SDave Plauger dumpsys_spinunlock(&cq->spinlock); 1583ca3e8d88SDave Plauger } 1584ca3e8d88SDave Plauger } 1585ca3e8d88SDave Plauger 1586ca3e8d88SDave Plauger static void 1587ca3e8d88SDave Plauger dumpsys_wait_cq(cqueue_t *cq, int live) 1588ca3e8d88SDave Plauger { 1589ca3e8d88SDave Plauger if (live) { 1590ca3e8d88SDave Plauger cv_wait(&cq->cv, &cq->mutex); 1591ca3e8d88SDave Plauger } else { 1592ca3e8d88SDave Plauger dumpsys_spinunlock(&cq->spinlock); 1593ca3e8d88SDave Plauger while (cq->open) 1594ca3e8d88SDave Plauger if (cq->first) 1595ca3e8d88SDave Plauger break; 1596ca3e8d88SDave Plauger dumpsys_spinlock(&cq->spinlock); 1597ca3e8d88SDave Plauger } 1598ca3e8d88SDave Plauger } 1599ca3e8d88SDave Plauger 1600ca3e8d88SDave Plauger static void 1601ca3e8d88SDave Plauger dumpsys_put_cq(cqueue_t *cq, cbuf_t *cp, int newstate, int live) 1602ca3e8d88SDave Plauger { 1603ca3e8d88SDave Plauger if (cp == NULL) 1604ca3e8d88SDave Plauger return; 1605ca3e8d88SDave Plauger 1606ca3e8d88SDave Plauger dumpsys_lock(cq, live); 1607ca3e8d88SDave Plauger 1608ca3e8d88SDave Plauger if (cq->ts != 0) { 1609ca3e8d88SDave Plauger cq->empty += gethrtime() - cq->ts; 1610ca3e8d88SDave Plauger cq->ts = 0; 1611ca3e8d88SDave Plauger } 1612ca3e8d88SDave Plauger 1613ca3e8d88SDave Plauger cp->state = newstate; 1614ca3e8d88SDave Plauger cp->next = NULL; 1615ca3e8d88SDave Plauger if (cq->last == NULL) 1616ca3e8d88SDave Plauger cq->first = cp; 1617ca3e8d88SDave Plauger else 1618ca3e8d88SDave Plauger cq->last->next = cp; 1619ca3e8d88SDave Plauger cq->last = cp; 1620ca3e8d88SDave Plauger 1621ca3e8d88SDave Plauger dumpsys_unlock(cq, live, 1); 1622ca3e8d88SDave Plauger } 1623ca3e8d88SDave Plauger 1624ca3e8d88SDave Plauger static cbuf_t * 1625ca3e8d88SDave Plauger dumpsys_get_cq(cqueue_t *cq, int live) 1626ca3e8d88SDave Plauger { 1627ca3e8d88SDave Plauger cbuf_t *cp; 1628ca3e8d88SDave Plauger hrtime_t now = gethrtime(); 1629ca3e8d88SDave Plauger 1630ca3e8d88SDave Plauger dumpsys_lock(cq, live); 1631ca3e8d88SDave Plauger 1632ca3e8d88SDave Plauger /* CONSTCOND */ 1633ca3e8d88SDave Plauger while (1) { 1634ca3e8d88SDave Plauger cp = (cbuf_t *)cq->first; 1635ca3e8d88SDave Plauger if (cp == NULL) { 1636ca3e8d88SDave Plauger if (cq->open == 0) 1637ca3e8d88SDave Plauger break; 1638ca3e8d88SDave Plauger dumpsys_wait_cq(cq, live); 1639ca3e8d88SDave Plauger continue; 1640ca3e8d88SDave Plauger } 1641ca3e8d88SDave Plauger cq->first = cp->next; 1642ca3e8d88SDave Plauger if (cq->first == NULL) { 1643ca3e8d88SDave Plauger cq->last = NULL; 1644ca3e8d88SDave Plauger cq->ts = now; 1645ca3e8d88SDave Plauger } 1646ca3e8d88SDave Plauger break; 1647ca3e8d88SDave Plauger } 1648ca3e8d88SDave Plauger 1649ca3e8d88SDave Plauger dumpsys_unlock(cq, live, cq->first != NULL || cq->open == 0); 1650ca3e8d88SDave Plauger return (cp); 1651ca3e8d88SDave Plauger } 1652ca3e8d88SDave Plauger 1653ca3e8d88SDave Plauger /* 1654ca3e8d88SDave Plauger * Send an error message to the console. If the main task is running 1655ca3e8d88SDave Plauger * just write the message via uprintf. If a helper is running the 1656ca3e8d88SDave Plauger * message has to be put on a queue for the main task. Setting fmt to 1657ca3e8d88SDave Plauger * NULL means flush the error message buffer. If fmt is not NULL, just 1658ca3e8d88SDave Plauger * add the text to the existing buffer. 1659ca3e8d88SDave Plauger */ 1660ca3e8d88SDave Plauger static void 1661ca3e8d88SDave Plauger dumpsys_errmsg(helper_t *hp, const char *fmt, ...) 1662ca3e8d88SDave Plauger { 1663ca3e8d88SDave Plauger dumpsync_t *ds = hp->ds; 1664ca3e8d88SDave Plauger cbuf_t *cp = hp->cperr; 1665ca3e8d88SDave Plauger va_list adx; 1666ca3e8d88SDave Plauger 1667ca3e8d88SDave Plauger if (hp->helper == MAINHELPER) { 1668ca3e8d88SDave Plauger if (fmt != NULL) { 1669ca3e8d88SDave Plauger if (ds->neednl) { 1670ca3e8d88SDave Plauger uprintf("\n"); 1671ca3e8d88SDave Plauger ds->neednl = 0; 1672ca3e8d88SDave Plauger } 1673ca3e8d88SDave Plauger va_start(adx, fmt); 1674ca3e8d88SDave Plauger vuprintf(fmt, adx); 1675ca3e8d88SDave Plauger va_end(adx); 1676ca3e8d88SDave Plauger } 1677ca3e8d88SDave Plauger } else if (fmt == NULL) { 1678ca3e8d88SDave Plauger if (cp != NULL) { 1679ca3e8d88SDave Plauger CQ_PUT(mainq, cp, CBUF_ERRMSG); 1680ca3e8d88SDave Plauger hp->cperr = NULL; 1681ca3e8d88SDave Plauger } 1682ca3e8d88SDave Plauger } else { 1683ca3e8d88SDave Plauger if (hp->cperr == NULL) { 1684ca3e8d88SDave Plauger cp = CQ_GET(freebufq); 1685ca3e8d88SDave Plauger hp->cperr = cp; 1686ca3e8d88SDave Plauger cp->used = 0; 1687ca3e8d88SDave Plauger } 1688ca3e8d88SDave Plauger va_start(adx, fmt); 1689ca3e8d88SDave Plauger cp->used += vsnprintf(cp->buf + cp->used, cp->size - cp->used, 1690ca3e8d88SDave Plauger fmt, adx); 1691ca3e8d88SDave Plauger va_end(adx); 1692ca3e8d88SDave Plauger if ((cp->used + LOG_MSGSIZE) > cp->size) { 1693ca3e8d88SDave Plauger CQ_PUT(mainq, cp, CBUF_ERRMSG); 1694ca3e8d88SDave Plauger hp->cperr = NULL; 1695ca3e8d88SDave Plauger } 1696ca3e8d88SDave Plauger } 1697ca3e8d88SDave Plauger } 1698ca3e8d88SDave Plauger 1699ca3e8d88SDave Plauger /* 1700ca3e8d88SDave Plauger * Write an output buffer to the dump file. If the main task is 1701ca3e8d88SDave Plauger * running just write the data. If a helper is running the output is 1702ca3e8d88SDave Plauger * placed on a queue for the main task. 1703ca3e8d88SDave Plauger */ 1704ca3e8d88SDave Plauger static void 1705ca3e8d88SDave Plauger dumpsys_swrite(helper_t *hp, cbuf_t *cp, size_t used) 1706ca3e8d88SDave Plauger { 1707ca3e8d88SDave Plauger dumpsync_t *ds = hp->ds; 1708ca3e8d88SDave Plauger 1709ca3e8d88SDave Plauger if (hp->helper == MAINHELPER) { 1710ca3e8d88SDave Plauger HRSTART(ds->perpage, write); 1711ca3e8d88SDave Plauger dumpvp_write(cp->buf, used); 1712ca3e8d88SDave Plauger HRSTOP(ds->perpage, write); 1713ca3e8d88SDave Plauger CQ_PUT(freebufq, cp, CBUF_FREEBUF); 1714ca3e8d88SDave Plauger } else { 1715ca3e8d88SDave Plauger cp->used = used; 1716ca3e8d88SDave Plauger CQ_PUT(mainq, cp, CBUF_WRITE); 1717ca3e8d88SDave Plauger } 1718ca3e8d88SDave Plauger } 1719ca3e8d88SDave Plauger 1720ca3e8d88SDave Plauger /* 1721ca3e8d88SDave Plauger * Copy one page within the mapped range. The offset starts at 0 and 1722ca3e8d88SDave Plauger * is relative to the first pfn. cp->buf + cp->off is the address of 1723ca3e8d88SDave Plauger * the first pfn. If dump_pagecopy returns a UE offset, create an 1724ca3e8d88SDave Plauger * error message. Returns the offset to the next pfn in the range 1725ca3e8d88SDave Plauger * selected by the bitmap. 1726ca3e8d88SDave Plauger */ 1727ca3e8d88SDave Plauger static int 1728ca3e8d88SDave Plauger dumpsys_copy_page(helper_t *hp, int offset) 1729ca3e8d88SDave Plauger { 1730ca3e8d88SDave Plauger cbuf_t *cp = hp->cpin; 1731ca3e8d88SDave Plauger int ueoff; 1732ca3e8d88SDave Plauger 1733ca3e8d88SDave Plauger ASSERT(cp->off + offset + PAGESIZE <= cp->size); 1734ca3e8d88SDave Plauger ASSERT(BT_TEST(dumpcfg.bitmap, cp->bitnum)); 1735ca3e8d88SDave Plauger 1736ca3e8d88SDave Plauger ueoff = dump_pagecopy(cp->buf + cp->off + offset, hp->page); 1737ca3e8d88SDave Plauger 1738ca3e8d88SDave Plauger /* ueoff is the offset in the page to a UE error */ 1739ca3e8d88SDave Plauger if (ueoff != -1) { 1740ca3e8d88SDave Plauger uint64_t pa = ptob(cp->pfn) + offset + ueoff; 1741ca3e8d88SDave Plauger 17429dd77bc8SDave Plauger dumpsys_errmsg(hp, "cpu %d: memory error at PA 0x%08x.%08x\n", 17439dd77bc8SDave Plauger CPU->cpu_id, (uint32_t)(pa >> 32), (uint32_t)pa); 1744ca3e8d88SDave Plauger } 1745ca3e8d88SDave Plauger 1746ca3e8d88SDave Plauger /* 1747ca3e8d88SDave Plauger * Advance bitnum and offset to the next input page for the 1748ca3e8d88SDave Plauger * next call to this function. 1749ca3e8d88SDave Plauger */ 1750ca3e8d88SDave Plauger offset += PAGESIZE; 1751ca3e8d88SDave Plauger cp->bitnum++; 1752ca3e8d88SDave Plauger while (cp->off + offset < cp->size) { 1753ca3e8d88SDave Plauger if (BT_TEST(dumpcfg.bitmap, cp->bitnum)) 1754ca3e8d88SDave Plauger break; 1755ca3e8d88SDave Plauger offset += PAGESIZE; 1756ca3e8d88SDave Plauger cp->bitnum++; 1757ca3e8d88SDave Plauger } 1758ca3e8d88SDave Plauger 1759ca3e8d88SDave Plauger return (offset); 1760ca3e8d88SDave Plauger } 1761ca3e8d88SDave Plauger 1762ca3e8d88SDave Plauger /* 1763ca3e8d88SDave Plauger * Read the helper queue, and copy one mapped page. Return 0 when 1764ca3e8d88SDave Plauger * done. Return 1 when a page has been copied into hp->page. 1765ca3e8d88SDave Plauger */ 1766ca3e8d88SDave Plauger static int 1767ca3e8d88SDave Plauger dumpsys_sread(helper_t *hp) 1768ca3e8d88SDave Plauger { 1769ca3e8d88SDave Plauger dumpsync_t *ds = hp->ds; 1770ca3e8d88SDave Plauger 1771ca3e8d88SDave Plauger /* CONSTCOND */ 1772ca3e8d88SDave Plauger while (1) { 1773ca3e8d88SDave Plauger 1774ca3e8d88SDave Plauger /* Find the next input buffer. */ 1775ca3e8d88SDave Plauger if (hp->cpin == NULL) { 1776ca3e8d88SDave Plauger HRSTART(hp->perpage, inwait); 1777ca3e8d88SDave Plauger 1778ca3e8d88SDave Plauger /* CONSTCOND */ 1779ca3e8d88SDave Plauger while (1) { 1780ca3e8d88SDave Plauger hp->cpin = CQ_GET(helperq); 1781ca3e8d88SDave Plauger dump_timeleft = dump_timeout; 1782ca3e8d88SDave Plauger 1783ca3e8d88SDave Plauger /* 1784ca3e8d88SDave Plauger * NULL return means the helper queue 1785ca3e8d88SDave Plauger * is closed and empty. 1786ca3e8d88SDave Plauger */ 1787ca3e8d88SDave Plauger if (hp->cpin == NULL) 1788ca3e8d88SDave Plauger break; 1789ca3e8d88SDave Plauger 1790ca3e8d88SDave Plauger /* Have input, check for dump I/O error. */ 1791ca3e8d88SDave Plauger if (!dump_ioerr) 1792ca3e8d88SDave Plauger break; 1793ca3e8d88SDave Plauger 1794ca3e8d88SDave Plauger /* 1795ca3e8d88SDave Plauger * If an I/O error occurs, stay in the 1796ca3e8d88SDave Plauger * loop in order to empty the helper 1797ca3e8d88SDave Plauger * queue. Return the buffers to the 1798ca3e8d88SDave Plauger * main task to unmap and free it. 1799ca3e8d88SDave Plauger */ 1800ca3e8d88SDave Plauger hp->cpin->used = 0; 1801ca3e8d88SDave Plauger CQ_PUT(mainq, hp->cpin, CBUF_USEDMAP); 1802ca3e8d88SDave Plauger } 1803ca3e8d88SDave Plauger HRSTOP(hp->perpage, inwait); 1804ca3e8d88SDave Plauger 1805ca3e8d88SDave Plauger /* Stop here when the helper queue is closed. */ 1806ca3e8d88SDave Plauger if (hp->cpin == NULL) 1807ca3e8d88SDave Plauger break; 1808ca3e8d88SDave Plauger 1809ca3e8d88SDave Plauger /* Set the offset=0 to get the first pfn. */ 1810ca3e8d88SDave Plauger hp->in = 0; 1811ca3e8d88SDave Plauger 1812ca3e8d88SDave Plauger /* Set the total processed to 0 */ 1813ca3e8d88SDave Plauger hp->used = 0; 1814ca3e8d88SDave Plauger } 1815ca3e8d88SDave Plauger 1816ca3e8d88SDave Plauger /* Process the next page. */ 1817ca3e8d88SDave Plauger if (hp->used < hp->cpin->used) { 1818ca3e8d88SDave Plauger 1819ca3e8d88SDave Plauger /* 1820ca3e8d88SDave Plauger * Get the next page from the input buffer and 1821ca3e8d88SDave Plauger * return a copy. 1822ca3e8d88SDave Plauger */ 1823ca3e8d88SDave Plauger ASSERT(hp->in != -1); 1824ca3e8d88SDave Plauger HRSTART(hp->perpage, copy); 1825ca3e8d88SDave Plauger hp->in = dumpsys_copy_page(hp, hp->in); 1826ca3e8d88SDave Plauger hp->used += PAGESIZE; 1827ca3e8d88SDave Plauger HRSTOP(hp->perpage, copy); 1828ca3e8d88SDave Plauger break; 1829ca3e8d88SDave Plauger 1830ca3e8d88SDave Plauger } else { 1831ca3e8d88SDave Plauger 1832ca3e8d88SDave Plauger /* 1833ca3e8d88SDave Plauger * Done with the input. Flush the VM and 1834ca3e8d88SDave Plauger * return the buffer to the main task. 1835ca3e8d88SDave Plauger */ 1836ca3e8d88SDave Plauger if (panicstr && hp->helper != MAINHELPER) 1837ca3e8d88SDave Plauger hat_flush_range(kas.a_hat, 1838ca3e8d88SDave Plauger hp->cpin->buf, hp->cpin->size); 1839ca3e8d88SDave Plauger dumpsys_errmsg(hp, NULL); 1840ca3e8d88SDave Plauger CQ_PUT(mainq, hp->cpin, CBUF_USEDMAP); 1841ca3e8d88SDave Plauger hp->cpin = NULL; 1842ca3e8d88SDave Plauger } 1843ca3e8d88SDave Plauger } 1844ca3e8d88SDave Plauger 1845ca3e8d88SDave Plauger return (hp->cpin != NULL); 1846ca3e8d88SDave Plauger } 1847ca3e8d88SDave Plauger 1848ca3e8d88SDave Plauger /* 1849ca3e8d88SDave Plauger * Compress size bytes starting at buf with bzip2 1850ca3e8d88SDave Plauger * mode: 1851ca3e8d88SDave Plauger * BZ_RUN add one more compressed page 1852ca3e8d88SDave Plauger * BZ_FINISH no more input, flush the state 1853ca3e8d88SDave Plauger */ 1854ca3e8d88SDave Plauger static void 1855ca3e8d88SDave Plauger dumpsys_bzrun(helper_t *hp, void *buf, size_t size, int mode) 1856ca3e8d88SDave Plauger { 1857ca3e8d88SDave Plauger dumpsync_t *ds = hp->ds; 1858ca3e8d88SDave Plauger const int CSIZE = sizeof (dumpcsize_t); 1859ca3e8d88SDave Plauger bz_stream *ps = &hp->bzstream; 1860ca3e8d88SDave Plauger int rc = 0; 1861ca3e8d88SDave Plauger uint32_t csize; 1862ca3e8d88SDave Plauger dumpcsize_t cs; 1863ca3e8d88SDave Plauger 1864ca3e8d88SDave Plauger /* Set input pointers to new input page */ 1865ca3e8d88SDave Plauger if (size > 0) { 1866ca3e8d88SDave Plauger ps->avail_in = size; 1867ca3e8d88SDave Plauger ps->next_in = buf; 1868ca3e8d88SDave Plauger } 1869ca3e8d88SDave Plauger 1870ca3e8d88SDave Plauger /* CONSTCOND */ 1871ca3e8d88SDave Plauger while (1) { 1872ca3e8d88SDave Plauger 1873ca3e8d88SDave Plauger /* Quit when all input has been consumed */ 1874ca3e8d88SDave Plauger if (ps->avail_in == 0 && mode == BZ_RUN) 1875ca3e8d88SDave Plauger break; 1876ca3e8d88SDave Plauger 1877ca3e8d88SDave Plauger /* Get a new output buffer */ 1878ca3e8d88SDave Plauger if (hp->cpout == NULL) { 1879ca3e8d88SDave Plauger HRSTART(hp->perpage, outwait); 1880ca3e8d88SDave Plauger hp->cpout = CQ_GET(freebufq); 1881ca3e8d88SDave Plauger HRSTOP(hp->perpage, outwait); 1882ca3e8d88SDave Plauger ps->avail_out = hp->cpout->size - CSIZE; 1883ca3e8d88SDave Plauger ps->next_out = hp->cpout->buf + CSIZE; 1884ca3e8d88SDave Plauger } 1885ca3e8d88SDave Plauger 1886ca3e8d88SDave Plauger /* Compress input, or finalize */ 1887ca3e8d88SDave Plauger HRSTART(hp->perpage, compress); 1888ca3e8d88SDave Plauger rc = BZ2_bzCompress(ps, mode); 1889ca3e8d88SDave Plauger HRSTOP(hp->perpage, compress); 1890ca3e8d88SDave Plauger 1891ca3e8d88SDave Plauger /* Check for error */ 1892ca3e8d88SDave Plauger if (mode == BZ_RUN && rc != BZ_RUN_OK) { 1893ca3e8d88SDave Plauger dumpsys_errmsg(hp, "%d: BZ_RUN error %s at page %lx\n", 1894ca3e8d88SDave Plauger hp->helper, BZ2_bzErrorString(rc), 1895ca3e8d88SDave Plauger hp->cpin->pagenum); 1896ca3e8d88SDave Plauger break; 1897ca3e8d88SDave Plauger } 1898ca3e8d88SDave Plauger 1899ca3e8d88SDave Plauger /* Write the buffer if it is full, or we are flushing */ 1900ca3e8d88SDave Plauger if (ps->avail_out == 0 || mode == BZ_FINISH) { 1901ca3e8d88SDave Plauger csize = hp->cpout->size - CSIZE - ps->avail_out; 1902ca3e8d88SDave Plauger cs = DUMP_SET_TAG(csize, hp->tag); 1903ca3e8d88SDave Plauger if (csize > 0) { 1904ca3e8d88SDave Plauger (void) memcpy(hp->cpout->buf, &cs, CSIZE); 1905ca3e8d88SDave Plauger dumpsys_swrite(hp, hp->cpout, csize + CSIZE); 1906ca3e8d88SDave Plauger hp->cpout = NULL; 1907ca3e8d88SDave Plauger } 1908ca3e8d88SDave Plauger } 1909ca3e8d88SDave Plauger 1910ca3e8d88SDave Plauger /* Check for final complete */ 1911ca3e8d88SDave Plauger if (mode == BZ_FINISH) { 1912ca3e8d88SDave Plauger if (rc == BZ_STREAM_END) 1913ca3e8d88SDave Plauger break; 1914ca3e8d88SDave Plauger if (rc != BZ_FINISH_OK) { 1915ca3e8d88SDave Plauger dumpsys_errmsg(hp, "%d: BZ_FINISH error %s\n", 1916ca3e8d88SDave Plauger hp->helper, BZ2_bzErrorString(rc)); 1917ca3e8d88SDave Plauger break; 1918ca3e8d88SDave Plauger } 1919ca3e8d88SDave Plauger } 1920ca3e8d88SDave Plauger } 1921ca3e8d88SDave Plauger 1922ca3e8d88SDave Plauger /* Cleanup state and buffers */ 1923ca3e8d88SDave Plauger if (mode == BZ_FINISH) { 1924ca3e8d88SDave Plauger 1925ca3e8d88SDave Plauger /* Reset state so that it is re-usable. */ 1926ca3e8d88SDave Plauger (void) BZ2_bzCompressReset(&hp->bzstream); 1927ca3e8d88SDave Plauger 1928ca3e8d88SDave Plauger /* Give any unused outout buffer to the main task */ 1929ca3e8d88SDave Plauger if (hp->cpout != NULL) { 1930ca3e8d88SDave Plauger hp->cpout->used = 0; 1931ca3e8d88SDave Plauger CQ_PUT(mainq, hp->cpout, CBUF_ERRMSG); 1932ca3e8d88SDave Plauger hp->cpout = NULL; 1933ca3e8d88SDave Plauger } 1934ca3e8d88SDave Plauger } 1935ca3e8d88SDave Plauger } 1936ca3e8d88SDave Plauger 1937ca3e8d88SDave Plauger static void 1938ca3e8d88SDave Plauger dumpsys_bz2compress(helper_t *hp) 1939ca3e8d88SDave Plauger { 1940ca3e8d88SDave Plauger dumpsync_t *ds = hp->ds; 1941ca3e8d88SDave Plauger dumpstreamhdr_t sh; 1942ca3e8d88SDave Plauger 1943ca3e8d88SDave Plauger (void) strcpy(sh.stream_magic, DUMP_STREAM_MAGIC); 1944ca3e8d88SDave Plauger sh.stream_pagenum = (pgcnt_t)-1; 1945ca3e8d88SDave Plauger sh.stream_npages = 0; 1946ca3e8d88SDave Plauger hp->cpin = NULL; 1947ca3e8d88SDave Plauger hp->cpout = NULL; 1948ca3e8d88SDave Plauger hp->cperr = NULL; 1949ca3e8d88SDave Plauger hp->in = 0; 1950ca3e8d88SDave Plauger hp->out = 0; 1951ca3e8d88SDave Plauger hp->bzstream.avail_in = 0; 1952ca3e8d88SDave Plauger 1953ca3e8d88SDave Plauger /* Bump reference to mainq while we are running */ 1954ca3e8d88SDave Plauger CQ_OPEN(mainq); 1955ca3e8d88SDave Plauger 1956ca3e8d88SDave Plauger /* Get one page at a time */ 1957ca3e8d88SDave Plauger while (dumpsys_sread(hp)) { 1958ca3e8d88SDave Plauger if (sh.stream_pagenum != hp->cpin->pagenum) { 1959ca3e8d88SDave Plauger sh.stream_pagenum = hp->cpin->pagenum; 1960ca3e8d88SDave Plauger sh.stream_npages = btop(hp->cpin->used); 1961ca3e8d88SDave Plauger dumpsys_bzrun(hp, &sh, sizeof (sh), BZ_RUN); 1962ca3e8d88SDave Plauger } 1963ca3e8d88SDave Plauger dumpsys_bzrun(hp, hp->page, PAGESIZE, 0); 1964ca3e8d88SDave Plauger } 1965ca3e8d88SDave Plauger 1966ca3e8d88SDave Plauger /* Done with input, flush any partial buffer */ 1967ca3e8d88SDave Plauger if (sh.stream_pagenum != (pgcnt_t)-1) { 1968ca3e8d88SDave Plauger dumpsys_bzrun(hp, NULL, 0, BZ_FINISH); 1969ca3e8d88SDave Plauger dumpsys_errmsg(hp, NULL); 1970ca3e8d88SDave Plauger } 1971ca3e8d88SDave Plauger 1972ca3e8d88SDave Plauger ASSERT(hp->cpin == NULL && hp->cpout == NULL && hp->cperr == NULL); 1973ca3e8d88SDave Plauger 1974ca3e8d88SDave Plauger /* Decrement main queue count, we are done */ 1975ca3e8d88SDave Plauger CQ_CLOSE(mainq); 1976ca3e8d88SDave Plauger } 1977ca3e8d88SDave Plauger 1978ca3e8d88SDave Plauger /* 1979ca3e8d88SDave Plauger * Compress with lzjb 1980ca3e8d88SDave Plauger * write stream block if full or size==0 1981ca3e8d88SDave Plauger * if csize==0 write stream header, else write <csize, data> 1982ca3e8d88SDave Plauger * size==0 is a call to flush a buffer 1983ca3e8d88SDave Plauger * hp->cpout is the buffer we are flushing or filling 1984ca3e8d88SDave Plauger * hp->out is the next index to fill data 1985ca3e8d88SDave Plauger * osize is either csize+data, or the size of a stream header 1986ca3e8d88SDave Plauger */ 1987ca3e8d88SDave Plauger static void 1988ca3e8d88SDave Plauger dumpsys_lzjbrun(helper_t *hp, size_t csize, void *buf, size_t size) 1989ca3e8d88SDave Plauger { 1990ca3e8d88SDave Plauger dumpsync_t *ds = hp->ds; 1991ca3e8d88SDave Plauger const int CSIZE = sizeof (dumpcsize_t); 1992ca3e8d88SDave Plauger dumpcsize_t cs; 1993ca3e8d88SDave Plauger size_t osize = csize > 0 ? CSIZE + size : size; 1994ca3e8d88SDave Plauger 1995ca3e8d88SDave Plauger /* If flush, and there is no buffer, just return */ 1996ca3e8d88SDave Plauger if (size == 0 && hp->cpout == NULL) 1997ca3e8d88SDave Plauger return; 1998ca3e8d88SDave Plauger 1999ca3e8d88SDave Plauger /* If flush, or cpout is full, write it out */ 2000ca3e8d88SDave Plauger if (size == 0 || 2001ca3e8d88SDave Plauger hp->cpout != NULL && hp->out + osize > hp->cpout->size) { 2002ca3e8d88SDave Plauger 2003ca3e8d88SDave Plauger /* Set tag+size word at the front of the stream block. */ 2004ca3e8d88SDave Plauger cs = DUMP_SET_TAG(hp->out - CSIZE, hp->tag); 2005ca3e8d88SDave Plauger (void) memcpy(hp->cpout->buf, &cs, CSIZE); 2006ca3e8d88SDave Plauger 2007ca3e8d88SDave Plauger /* Write block to dump file. */ 2008ca3e8d88SDave Plauger dumpsys_swrite(hp, hp->cpout, hp->out); 2009ca3e8d88SDave Plauger 2010ca3e8d88SDave Plauger /* Clear pointer to indicate we need a new buffer */ 2011ca3e8d88SDave Plauger hp->cpout = NULL; 2012ca3e8d88SDave Plauger 2013ca3e8d88SDave Plauger /* flushing, we are done */ 2014ca3e8d88SDave Plauger if (size == 0) 2015ca3e8d88SDave Plauger return; 20167c478bd9Sstevel@tonic-gate } 20177c478bd9Sstevel@tonic-gate 2018ca3e8d88SDave Plauger /* Get an output buffer if we dont have one. */ 2019ca3e8d88SDave Plauger if (hp->cpout == NULL) { 2020ca3e8d88SDave Plauger HRSTART(hp->perpage, outwait); 2021ca3e8d88SDave Plauger hp->cpout = CQ_GET(freebufq); 2022ca3e8d88SDave Plauger HRSTOP(hp->perpage, outwait); 2023ca3e8d88SDave Plauger hp->out = CSIZE; 20247c478bd9Sstevel@tonic-gate } 2025ca3e8d88SDave Plauger 2026ca3e8d88SDave Plauger /* Store csize word. This is the size of compressed data. */ 2027ca3e8d88SDave Plauger if (csize > 0) { 2028ca3e8d88SDave Plauger cs = DUMP_SET_TAG(csize, 0); 2029ca3e8d88SDave Plauger (void) memcpy(hp->cpout->buf + hp->out, &cs, CSIZE); 2030ca3e8d88SDave Plauger hp->out += CSIZE; 2031ca3e8d88SDave Plauger } 2032ca3e8d88SDave Plauger 2033ca3e8d88SDave Plauger /* Store the data. */ 2034ca3e8d88SDave Plauger (void) memcpy(hp->cpout->buf + hp->out, buf, size); 2035ca3e8d88SDave Plauger hp->out += size; 20367c478bd9Sstevel@tonic-gate } 20377c478bd9Sstevel@tonic-gate 20387c478bd9Sstevel@tonic-gate static void 2039ca3e8d88SDave Plauger dumpsys_lzjbcompress(helper_t *hp) 20407c478bd9Sstevel@tonic-gate { 2041ca3e8d88SDave Plauger dumpsync_t *ds = hp->ds; 2042ca3e8d88SDave Plauger size_t csize; 2043ca3e8d88SDave Plauger dumpstreamhdr_t sh; 2044ca3e8d88SDave Plauger 2045ca3e8d88SDave Plauger (void) strcpy(sh.stream_magic, DUMP_STREAM_MAGIC); 2046ca3e8d88SDave Plauger sh.stream_pagenum = (pfn_t)-1; 2047ca3e8d88SDave Plauger sh.stream_npages = 0; 2048ca3e8d88SDave Plauger hp->cpin = NULL; 2049ca3e8d88SDave Plauger hp->cpout = NULL; 2050ca3e8d88SDave Plauger hp->cperr = NULL; 2051ca3e8d88SDave Plauger hp->in = 0; 2052ca3e8d88SDave Plauger hp->out = 0; 2053ca3e8d88SDave Plauger 2054ca3e8d88SDave Plauger /* Bump reference to mainq while we are running */ 2055ca3e8d88SDave Plauger CQ_OPEN(mainq); 2056ca3e8d88SDave Plauger 2057ca3e8d88SDave Plauger /* Get one page at a time */ 2058ca3e8d88SDave Plauger while (dumpsys_sread(hp)) { 2059ca3e8d88SDave Plauger 2060ca3e8d88SDave Plauger /* Create a stream header for each new input map */ 2061ca3e8d88SDave Plauger if (sh.stream_pagenum != hp->cpin->pagenum) { 2062ca3e8d88SDave Plauger sh.stream_pagenum = hp->cpin->pagenum; 2063ca3e8d88SDave Plauger sh.stream_npages = btop(hp->cpin->used); 2064ca3e8d88SDave Plauger dumpsys_lzjbrun(hp, 0, &sh, sizeof (sh)); 2065ca3e8d88SDave Plauger } 2066ca3e8d88SDave Plauger 2067ca3e8d88SDave Plauger /* Compress one page */ 2068ca3e8d88SDave Plauger HRSTART(hp->perpage, compress); 2069ca3e8d88SDave Plauger csize = compress(hp->page, hp->lzbuf, PAGESIZE); 2070ca3e8d88SDave Plauger HRSTOP(hp->perpage, compress); 2071ca3e8d88SDave Plauger 2072ca3e8d88SDave Plauger /* Add csize+data to output block */ 2073ca3e8d88SDave Plauger ASSERT(csize > 0 && csize <= PAGESIZE); 2074ca3e8d88SDave Plauger dumpsys_lzjbrun(hp, csize, hp->lzbuf, csize); 2075ca3e8d88SDave Plauger } 2076ca3e8d88SDave Plauger 2077ca3e8d88SDave Plauger /* Done with input, flush any partial buffer */ 2078ca3e8d88SDave Plauger if (sh.stream_pagenum != (pfn_t)-1) { 2079ca3e8d88SDave Plauger dumpsys_lzjbrun(hp, 0, NULL, 0); 2080ca3e8d88SDave Plauger dumpsys_errmsg(hp, NULL); 2081ca3e8d88SDave Plauger } 2082ca3e8d88SDave Plauger 2083ca3e8d88SDave Plauger ASSERT(hp->cpin == NULL && hp->cpout == NULL && hp->cperr == NULL); 2084ca3e8d88SDave Plauger 2085ca3e8d88SDave Plauger /* Decrement main queue count, we are done */ 2086ca3e8d88SDave Plauger CQ_CLOSE(mainq); 20877c478bd9Sstevel@tonic-gate } 20887c478bd9Sstevel@tonic-gate 20897c478bd9Sstevel@tonic-gate /* 2090ca3e8d88SDave Plauger * Dump helper called from panic_idle() to compress pages. CPUs in 2091ca3e8d88SDave Plauger * this path must not call most kernel services. 2092ca3e8d88SDave Plauger * 2093ca3e8d88SDave Plauger * During panic, all but one of the CPUs is idle. These CPUs are used 2094ca3e8d88SDave Plauger * as helpers working in parallel to copy and compress memory 2095ca3e8d88SDave Plauger * pages. During a panic, however, these processors cannot call any 2096ca3e8d88SDave Plauger * kernel services. This is because mutexes become no-ops during 2097ca3e8d88SDave Plauger * panic, and, cross-call interrupts are inhibited. Therefore, during 2098ca3e8d88SDave Plauger * panic dump the helper CPUs communicate with the panic CPU using 2099ca3e8d88SDave Plauger * memory variables. All memory mapping and I/O is performed by the 2100ca3e8d88SDave Plauger * panic CPU. 21017c478bd9Sstevel@tonic-gate */ 21027c478bd9Sstevel@tonic-gate void 2103ca3e8d88SDave Plauger dumpsys_helper() 21047c478bd9Sstevel@tonic-gate { 2105ca3e8d88SDave Plauger dumpsys_spinlock(&dumpcfg.helper_lock); 2106ca3e8d88SDave Plauger if (dumpcfg.helpers_wanted) { 2107ca3e8d88SDave Plauger helper_t *hp, *hpend = &dumpcfg.helper[dumpcfg.nhelper]; 21087c478bd9Sstevel@tonic-gate 2109ca3e8d88SDave Plauger for (hp = dumpcfg.helper; hp != hpend; hp++) { 2110ca3e8d88SDave Plauger if (hp->helper == FREEHELPER) { 2111ca3e8d88SDave Plauger hp->helper = CPU->cpu_id; 2112ca3e8d88SDave Plauger BT_SET(dumpcfg.helpermap, CPU->cpu_seqid); 2113ca3e8d88SDave Plauger 2114ca3e8d88SDave Plauger dumpsys_spinunlock(&dumpcfg.helper_lock); 2115ca3e8d88SDave Plauger 2116ca3e8d88SDave Plauger if (dumpcfg.clevel < DUMP_CLEVEL_BZIP2) 2117ca3e8d88SDave Plauger dumpsys_lzjbcompress(hp); 2118ca3e8d88SDave Plauger else 2119ca3e8d88SDave Plauger dumpsys_bz2compress(hp); 2120ca3e8d88SDave Plauger 2121ca3e8d88SDave Plauger hp->helper = DONEHELPER; 2122ca3e8d88SDave Plauger return; 2123ca3e8d88SDave Plauger } 21247c478bd9Sstevel@tonic-gate } 21257c478bd9Sstevel@tonic-gate } 2126ca3e8d88SDave Plauger dumpsys_spinunlock(&dumpcfg.helper_lock); 21277c478bd9Sstevel@tonic-gate } 21287c478bd9Sstevel@tonic-gate 21297c478bd9Sstevel@tonic-gate /* 2130ca3e8d88SDave Plauger * Dump helper for live dumps. 2131ca3e8d88SDave Plauger * These run as a system task. 21327c478bd9Sstevel@tonic-gate */ 2133ca3e8d88SDave Plauger static void 2134ca3e8d88SDave Plauger dumpsys_live_helper(void *arg) 21357c478bd9Sstevel@tonic-gate { 2136ca3e8d88SDave Plauger helper_t *hp = arg; 21377c478bd9Sstevel@tonic-gate 2138ca3e8d88SDave Plauger BT_ATOMIC_SET(dumpcfg.helpermap, CPU->cpu_seqid); 2139ca3e8d88SDave Plauger if (dumpcfg.clevel < DUMP_CLEVEL_BZIP2) 2140ca3e8d88SDave Plauger dumpsys_lzjbcompress(hp); 2141ca3e8d88SDave Plauger else 2142ca3e8d88SDave Plauger dumpsys_bz2compress(hp); 21437c478bd9Sstevel@tonic-gate } 21447c478bd9Sstevel@tonic-gate 21457c478bd9Sstevel@tonic-gate /* 2146ca3e8d88SDave Plauger * Compress one page with lzjb (single threaded case) 21477c478bd9Sstevel@tonic-gate */ 21487c478bd9Sstevel@tonic-gate static void 2149ca3e8d88SDave Plauger dumpsys_lzjb_page(helper_t *hp, cbuf_t *cp) 21507c478bd9Sstevel@tonic-gate { 2151ca3e8d88SDave Plauger dumpsync_t *ds = hp->ds; 2152ca3e8d88SDave Plauger uint32_t csize; 21537c478bd9Sstevel@tonic-gate 2154ca3e8d88SDave Plauger hp->helper = MAINHELPER; 2155ca3e8d88SDave Plauger hp->in = 0; 2156ca3e8d88SDave Plauger hp->used = 0; 2157ca3e8d88SDave Plauger hp->cpin = cp; 2158ca3e8d88SDave Plauger while (hp->used < cp->used) { 2159ca3e8d88SDave Plauger HRSTART(hp->perpage, copy); 2160ca3e8d88SDave Plauger hp->in = dumpsys_copy_page(hp, hp->in); 2161ca3e8d88SDave Plauger hp->used += PAGESIZE; 2162ca3e8d88SDave Plauger HRSTOP(hp->perpage, copy); 2163ca3e8d88SDave Plauger 2164ca3e8d88SDave Plauger HRSTART(hp->perpage, compress); 2165ca3e8d88SDave Plauger csize = compress(hp->page, hp->lzbuf, PAGESIZE); 2166ca3e8d88SDave Plauger HRSTOP(hp->perpage, compress); 2167ca3e8d88SDave Plauger 2168ca3e8d88SDave Plauger HRSTART(hp->perpage, write); 2169ca3e8d88SDave Plauger dumpvp_write(&csize, sizeof (csize)); 2170ca3e8d88SDave Plauger dumpvp_write(hp->lzbuf, csize); 2171ca3e8d88SDave Plauger HRSTOP(hp->perpage, write); 21727c478bd9Sstevel@tonic-gate } 2173ca3e8d88SDave Plauger CQ_PUT(mainq, hp->cpin, CBUF_USEDMAP); 2174ca3e8d88SDave Plauger hp->cpin = NULL; 21757c478bd9Sstevel@tonic-gate } 21767c478bd9Sstevel@tonic-gate 2177ca3e8d88SDave Plauger /* 2178ca3e8d88SDave Plauger * Main task to dump pages. This is called on the dump CPU. 2179ca3e8d88SDave Plauger */ 2180ca3e8d88SDave Plauger static void 2181ca3e8d88SDave Plauger dumpsys_main_task(void *arg) 21827c478bd9Sstevel@tonic-gate { 2183ca3e8d88SDave Plauger dumpsync_t *ds = arg; 2184ca3e8d88SDave Plauger pgcnt_t pagenum = 0, bitnum = 0, hibitnum; 2185ca3e8d88SDave Plauger dumpmlw_t mlw; 2186ca3e8d88SDave Plauger cbuf_t *cp; 2187ca3e8d88SDave Plauger pgcnt_t baseoff, pfnoff; 2188ca3e8d88SDave Plauger pfn_t base, pfn; 2189ca3e8d88SDave Plauger int sec; 2190ca3e8d88SDave Plauger 2191ca3e8d88SDave Plauger dump_init_memlist_walker(&mlw); 2192ca3e8d88SDave Plauger 2193ca3e8d88SDave Plauger /* CONSTCOND */ 2194ca3e8d88SDave Plauger while (1) { 2195ca3e8d88SDave Plauger 2196ca3e8d88SDave Plauger if (ds->percent > ds->percent_done) { 2197ca3e8d88SDave Plauger ds->percent_done = ds->percent; 2198ca3e8d88SDave Plauger sec = (gethrtime() - ds->start) / 1000 / 1000 / 1000; 2199ca3e8d88SDave Plauger uprintf("^\r%2d:%02d %3d%% done", 2200ca3e8d88SDave Plauger sec / 60, sec % 60, ds->percent); 2201ca3e8d88SDave Plauger ds->neednl = 1; 2202ca3e8d88SDave Plauger } 22037c478bd9Sstevel@tonic-gate 2204ca3e8d88SDave Plauger while (CQ_IS_EMPTY(mainq) && !CQ_IS_EMPTY(writerq)) { 22057c478bd9Sstevel@tonic-gate 2206ca3e8d88SDave Plauger /* the writerq never blocks */ 2207ca3e8d88SDave Plauger cp = CQ_GET(writerq); 2208ca3e8d88SDave Plauger if (cp == NULL) 2209ca3e8d88SDave Plauger break; 22107c478bd9Sstevel@tonic-gate 2211ca3e8d88SDave Plauger dump_timeleft = dump_timeout; 22127c478bd9Sstevel@tonic-gate 2213ca3e8d88SDave Plauger HRSTART(ds->perpage, write); 2214ca3e8d88SDave Plauger dumpvp_write(cp->buf, cp->used); 2215ca3e8d88SDave Plauger HRSTOP(ds->perpage, write); 22167c478bd9Sstevel@tonic-gate 2217ca3e8d88SDave Plauger CQ_PUT(freebufq, cp, CBUF_FREEBUF); 2218ca3e8d88SDave Plauger } 22197c478bd9Sstevel@tonic-gate 2220ca3e8d88SDave Plauger /* 2221ca3e8d88SDave Plauger * Wait here for some buffers to process. Returns NULL 2222ca3e8d88SDave Plauger * when all helpers have terminated and all buffers 2223ca3e8d88SDave Plauger * have been processed. 2224ca3e8d88SDave Plauger */ 2225ca3e8d88SDave Plauger cp = CQ_GET(mainq); 22267c478bd9Sstevel@tonic-gate 2227ca3e8d88SDave Plauger if (cp == NULL) { 22287c478bd9Sstevel@tonic-gate 2229ca3e8d88SDave Plauger /* Drain the write queue. */ 2230ca3e8d88SDave Plauger if (!CQ_IS_EMPTY(writerq)) 2231ca3e8d88SDave Plauger continue; 22327c478bd9Sstevel@tonic-gate 2233ca3e8d88SDave Plauger /* Main task exits here. */ 2234ca3e8d88SDave Plauger break; 2235ca3e8d88SDave Plauger } 22367c478bd9Sstevel@tonic-gate 2237ca3e8d88SDave Plauger dump_timeleft = dump_timeout; 22387c478bd9Sstevel@tonic-gate 2239ca3e8d88SDave Plauger switch (cp->state) { 22407c478bd9Sstevel@tonic-gate 2241ca3e8d88SDave Plauger case CBUF_FREEMAP: 22427c478bd9Sstevel@tonic-gate 2243ca3e8d88SDave Plauger /* 2244ca3e8d88SDave Plauger * Note that we drop CBUF_FREEMAP buffers on 2245ca3e8d88SDave Plauger * the floor (they will not be on any cqueue) 2246ca3e8d88SDave Plauger * when we no longer need them. 2247ca3e8d88SDave Plauger */ 2248ca3e8d88SDave Plauger if (bitnum >= dumpcfg.bitmapsize) 2249ca3e8d88SDave Plauger break; 2250ca3e8d88SDave Plauger 2251ca3e8d88SDave Plauger if (dump_ioerr) { 2252ca3e8d88SDave Plauger bitnum = dumpcfg.bitmapsize; 2253ca3e8d88SDave Plauger CQ_CLOSE(helperq); 2254ca3e8d88SDave Plauger break; 2255ca3e8d88SDave Plauger } 2256ca3e8d88SDave Plauger 2257ca3e8d88SDave Plauger HRSTART(ds->perpage, bitmap); 2258ca3e8d88SDave Plauger for (; bitnum < dumpcfg.bitmapsize; bitnum++) 2259ca3e8d88SDave Plauger if (BT_TEST(dumpcfg.bitmap, bitnum)) 2260ca3e8d88SDave Plauger break; 2261ca3e8d88SDave Plauger HRSTOP(ds->perpage, bitmap); 22627c478bd9Sstevel@tonic-gate dump_timeleft = dump_timeout; 22637c478bd9Sstevel@tonic-gate 2264ca3e8d88SDave Plauger if (bitnum >= dumpcfg.bitmapsize) { 2265ca3e8d88SDave Plauger CQ_CLOSE(helperq); 2266ca3e8d88SDave Plauger break; 2267ca3e8d88SDave Plauger } 2268ca3e8d88SDave Plauger 2269ca3e8d88SDave Plauger /* 2270ca3e8d88SDave Plauger * Try to map CBUF_MAPSIZE ranges. Can't 2271ca3e8d88SDave Plauger * assume that memory segment size is a 2272ca3e8d88SDave Plauger * multiple of CBUF_MAPSIZE. Can't assume that 2273ca3e8d88SDave Plauger * the segment starts on a CBUF_MAPSIZE 2274ca3e8d88SDave Plauger * boundary. 2275ca3e8d88SDave Plauger */ 2276ca3e8d88SDave Plauger pfn = dump_bitnum_to_pfn(bitnum, &mlw); 2277ca3e8d88SDave Plauger ASSERT(pfn != PFN_INVALID); 2278ca3e8d88SDave Plauger ASSERT(bitnum + mlw.mpleft <= dumpcfg.bitmapsize); 2279ca3e8d88SDave Plauger 2280ca3e8d88SDave Plauger base = P2ALIGN(pfn, CBUF_MAPNP); 2281ca3e8d88SDave Plauger if (base < mlw.mpaddr) { 2282ca3e8d88SDave Plauger base = mlw.mpaddr; 2283ca3e8d88SDave Plauger baseoff = P2PHASE(base, CBUF_MAPNP); 2284ca3e8d88SDave Plauger } else { 2285ca3e8d88SDave Plauger baseoff = 0; 2286ca3e8d88SDave Plauger } 2287ca3e8d88SDave Plauger 2288ca3e8d88SDave Plauger pfnoff = pfn - base; 2289ca3e8d88SDave Plauger if (pfnoff + mlw.mpleft < CBUF_MAPNP) { 2290ca3e8d88SDave Plauger hibitnum = bitnum + mlw.mpleft; 2291ca3e8d88SDave Plauger cp->size = ptob(pfnoff + mlw.mpleft); 2292ca3e8d88SDave Plauger } else { 2293ca3e8d88SDave Plauger hibitnum = bitnum - pfnoff + CBUF_MAPNP - 2294ca3e8d88SDave Plauger baseoff; 2295ca3e8d88SDave Plauger cp->size = CBUF_MAPSIZE - ptob(baseoff); 2296ca3e8d88SDave Plauger } 2297ca3e8d88SDave Plauger 2298ca3e8d88SDave Plauger cp->pfn = pfn; 2299ca3e8d88SDave Plauger cp->bitnum = bitnum++; 2300ca3e8d88SDave Plauger cp->pagenum = pagenum++; 2301ca3e8d88SDave Plauger cp->off = ptob(pfnoff); 2302ca3e8d88SDave Plauger 2303ca3e8d88SDave Plauger for (; bitnum < hibitnum; bitnum++) 2304ca3e8d88SDave Plauger if (BT_TEST(dumpcfg.bitmap, bitnum)) 2305ca3e8d88SDave Plauger pagenum++; 2306ca3e8d88SDave Plauger 2307ca3e8d88SDave Plauger dump_timeleft = dump_timeout; 2308ca3e8d88SDave Plauger cp->used = ptob(pagenum - cp->pagenum); 2309ca3e8d88SDave Plauger 2310ca3e8d88SDave Plauger HRSTART(ds->perpage, map); 2311ca3e8d88SDave Plauger hat_devload(kas.a_hat, cp->buf, cp->size, base, 2312ca3e8d88SDave Plauger PROT_READ, HAT_LOAD_NOCONSIST); 2313ca3e8d88SDave Plauger HRSTOP(ds->perpage, map); 2314ca3e8d88SDave Plauger 2315ca3e8d88SDave Plauger ds->pages_mapped += btop(cp->size); 2316ca3e8d88SDave Plauger ds->pages_used += pagenum - cp->pagenum; 2317ca3e8d88SDave Plauger 2318ca3e8d88SDave Plauger CQ_OPEN(mainq); 2319ca3e8d88SDave Plauger 2320ca3e8d88SDave Plauger /* 2321ca3e8d88SDave Plauger * If there are no helpers the main task does 2322ca3e8d88SDave Plauger * non-streams lzjb compress. 2323ca3e8d88SDave Plauger */ 2324ca3e8d88SDave Plauger if (dumpcfg.clevel == 0) { 2325ca3e8d88SDave Plauger dumpsys_lzjb_page(dumpcfg.helper, cp); 2326ca3e8d88SDave Plauger break; 2327ca3e8d88SDave Plauger } 2328ca3e8d88SDave Plauger 2329ca3e8d88SDave Plauger /* pass mapped pages to a helper */ 2330ca3e8d88SDave Plauger CQ_PUT(helperq, cp, CBUF_INREADY); 2331ca3e8d88SDave Plauger 2332ca3e8d88SDave Plauger /* the last page was done */ 2333ca3e8d88SDave Plauger if (bitnum >= dumpcfg.bitmapsize) 2334ca3e8d88SDave Plauger CQ_CLOSE(helperq); 2335ca3e8d88SDave Plauger 2336ca3e8d88SDave Plauger break; 2337ca3e8d88SDave Plauger 2338ca3e8d88SDave Plauger case CBUF_USEDMAP: 2339ca3e8d88SDave Plauger 2340ca3e8d88SDave Plauger ds->npages += btop(cp->used); 2341ca3e8d88SDave Plauger 2342ca3e8d88SDave Plauger HRSTART(ds->perpage, unmap); 2343ca3e8d88SDave Plauger hat_unload(kas.a_hat, cp->buf, cp->size, HAT_UNLOAD); 2344ca3e8d88SDave Plauger HRSTOP(ds->perpage, unmap); 2345ca3e8d88SDave Plauger 2346ca3e8d88SDave Plauger if (bitnum < dumpcfg.bitmapsize) 2347ca3e8d88SDave Plauger CQ_PUT(mainq, cp, CBUF_FREEMAP); 2348ca3e8d88SDave Plauger CQ_CLOSE(mainq); 2349ca3e8d88SDave Plauger 2350ca3e8d88SDave Plauger ASSERT(ds->npages <= dumphdr->dump_npages); 2351ca3e8d88SDave Plauger ds->percent = ds->npages * 100LL / dumphdr->dump_npages; 2352ca3e8d88SDave Plauger break; 2353ca3e8d88SDave Plauger 2354ca3e8d88SDave Plauger case CBUF_WRITE: 2355ca3e8d88SDave Plauger 2356ca3e8d88SDave Plauger CQ_PUT(writerq, cp, CBUF_WRITE); 2357ca3e8d88SDave Plauger break; 2358ca3e8d88SDave Plauger 2359ca3e8d88SDave Plauger case CBUF_ERRMSG: 2360ca3e8d88SDave Plauger 2361ca3e8d88SDave Plauger if (cp->used > 0) { 2362ca3e8d88SDave Plauger cp->buf[cp->size - 2] = '\n'; 2363ca3e8d88SDave Plauger cp->buf[cp->size - 1] = '\0'; 2364ca3e8d88SDave Plauger if (ds->neednl) { 2365ca3e8d88SDave Plauger uprintf("\n%s", cp->buf); 2366ca3e8d88SDave Plauger ds->neednl = 0; 2367ca3e8d88SDave Plauger } else { 2368ca3e8d88SDave Plauger uprintf("%s", cp->buf); 2369ca3e8d88SDave Plauger } 23709dd77bc8SDave Plauger /* wait for console output */ 23719dd77bc8SDave Plauger drv_usecwait(200000); 23729dd77bc8SDave Plauger dump_timeleft = dump_timeout; 2373ca3e8d88SDave Plauger } 2374ca3e8d88SDave Plauger CQ_PUT(freebufq, cp, CBUF_FREEBUF); 2375ca3e8d88SDave Plauger break; 2376ca3e8d88SDave Plauger 2377ca3e8d88SDave Plauger default: 2378ca3e8d88SDave Plauger uprintf("dump: unexpected buffer state %d, " 2379ca3e8d88SDave Plauger "buffer will be lost\n", cp->state); 2380ca3e8d88SDave Plauger break; 2381ca3e8d88SDave Plauger 2382ca3e8d88SDave Plauger } /* end switch */ 2383ca3e8d88SDave Plauger 2384ca3e8d88SDave Plauger } /* end while(1) */ 23857c478bd9Sstevel@tonic-gate } 23867c478bd9Sstevel@tonic-gate 2387ca3e8d88SDave Plauger #ifdef COLLECT_METRICS 2388ca3e8d88SDave Plauger size_t 2389ca3e8d88SDave Plauger dumpsys_metrics(dumpsync_t *ds, char *buf, size_t size) 23907c478bd9Sstevel@tonic-gate { 2391ca3e8d88SDave Plauger dumpcfg_t *cfg = &dumpcfg; 2392ca3e8d88SDave Plauger int myid = CPU->cpu_seqid; 2393ca3e8d88SDave Plauger int i, compress_ratio; 2394ca3e8d88SDave Plauger int sec, iorate; 2395ca3e8d88SDave Plauger helper_t *hp, *hpend = &cfg->helper[cfg->nhelper]; 2396ca3e8d88SDave Plauger char *e = buf + size; 2397ca3e8d88SDave Plauger char *p = buf; 2398ca3e8d88SDave Plauger 2399ca3e8d88SDave Plauger sec = ds->elapsed / (1000 * 1000 * 1000ULL); 2400ca3e8d88SDave Plauger if (sec < 1) 2401ca3e8d88SDave Plauger sec = 1; 2402ca3e8d88SDave Plauger 2403ca3e8d88SDave Plauger if (ds->iotime < 1) 2404ca3e8d88SDave Plauger ds->iotime = 1; 2405ca3e8d88SDave Plauger iorate = (ds->nwrite * 100000ULL) / ds->iotime; 2406ca3e8d88SDave Plauger 2407ca3e8d88SDave Plauger compress_ratio = 100LL * ds->npages / btopr(ds->nwrite + 1); 2408ca3e8d88SDave Plauger 2409ca3e8d88SDave Plauger #define P(...) (p += p < e ? snprintf(p, e - p, __VA_ARGS__) : 0) 2410ca3e8d88SDave Plauger 2411ca3e8d88SDave Plauger P("Master cpu_seqid,%d\n", CPU->cpu_seqid); 2412ca3e8d88SDave Plauger P("Master cpu_id,%d\n", CPU->cpu_id); 2413ca3e8d88SDave Plauger P("dump_flags,0x%x\n", dumphdr->dump_flags); 2414ca3e8d88SDave Plauger P("dump_ioerr,%d\n", dump_ioerr); 2415ca3e8d88SDave Plauger 2416ca3e8d88SDave Plauger P("Helpers:\n"); 2417ca3e8d88SDave Plauger for (i = 0; i < ncpus; i++) { 2418ca3e8d88SDave Plauger if ((i & 15) == 0) 2419ca3e8d88SDave Plauger P(",,%03d,", i); 2420ca3e8d88SDave Plauger if (i == myid) 2421ca3e8d88SDave Plauger P(" M"); 2422ca3e8d88SDave Plauger else if (BT_TEST(cfg->helpermap, i)) 2423ca3e8d88SDave Plauger P("%4d", cpu_seq[i]->cpu_id); 2424ca3e8d88SDave Plauger else 2425ca3e8d88SDave Plauger P(" *"); 2426ca3e8d88SDave Plauger if ((i & 15) == 15) 2427ca3e8d88SDave Plauger P("\n"); 2428ca3e8d88SDave Plauger } 24297c478bd9Sstevel@tonic-gate 2430ca3e8d88SDave Plauger P("ncbuf_used,%d\n", cfg->ncbuf_used); 2431ca3e8d88SDave Plauger P("ncmap,%d\n", cfg->ncmap); 2432ca3e8d88SDave Plauger 2433ca3e8d88SDave Plauger P("Found %ldM ranges,%ld\n", (CBUF_MAPSIZE / DUMP_1MB), cfg->found4m); 2434ca3e8d88SDave Plauger P("Found small pages,%ld\n", cfg->foundsm); 2435ca3e8d88SDave Plauger 2436ca3e8d88SDave Plauger P("Compression level,%d\n", cfg->clevel); 2437ca3e8d88SDave Plauger P("Compression type,%s %s\n", cfg->clevel == 0 ? "serial" : "parallel", 2438ca3e8d88SDave Plauger cfg->clevel >= DUMP_CLEVEL_BZIP2 ? "bzip2" : "lzjb"); 2439ca3e8d88SDave Plauger P("Compression ratio,%d.%02d\n", compress_ratio / 100, compress_ratio % 2440ca3e8d88SDave Plauger 100); 2441ca3e8d88SDave Plauger P("nhelper_used,%d\n", cfg->nhelper_used); 2442ca3e8d88SDave Plauger 2443ca3e8d88SDave Plauger P("Dump I/O rate MBS,%d.%02d\n", iorate / 100, iorate % 100); 2444ca3e8d88SDave Plauger P("..total bytes,%lld\n", (u_longlong_t)ds->nwrite); 2445ca3e8d88SDave Plauger P("..total nsec,%lld\n", (u_longlong_t)ds->iotime); 2446ca3e8d88SDave Plauger P("dumpbuf.iosize,%ld\n", dumpbuf.iosize); 2447ca3e8d88SDave Plauger P("dumpbuf.size,%ld\n", dumpbuf.size); 2448ca3e8d88SDave Plauger 2449ca3e8d88SDave Plauger P("Dump pages/sec,%llu\n", (u_longlong_t)ds->npages / sec); 2450ca3e8d88SDave Plauger P("Dump pages,%llu\n", (u_longlong_t)ds->npages); 2451ca3e8d88SDave Plauger P("Dump time,%d\n", sec); 2452ca3e8d88SDave Plauger 2453ca3e8d88SDave Plauger if (ds->pages_mapped > 0) 2454ca3e8d88SDave Plauger P("per-cent map utilization,%d\n", (int)((100 * ds->pages_used) 2455ca3e8d88SDave Plauger / ds->pages_mapped)); 2456ca3e8d88SDave Plauger 2457ca3e8d88SDave Plauger P("\nPer-page metrics:\n"); 2458ca3e8d88SDave Plauger if (ds->npages > 0) { 2459ca3e8d88SDave Plauger for (hp = cfg->helper; hp != hpend; hp++) { 2460ca3e8d88SDave Plauger #define PERPAGE(x) ds->perpage.x += hp->perpage.x; 2461ca3e8d88SDave Plauger PERPAGES; 2462ca3e8d88SDave Plauger #undef PERPAGE 24637c478bd9Sstevel@tonic-gate } 2464ca3e8d88SDave Plauger #define PERPAGE(x) \ 2465ca3e8d88SDave Plauger P("%s nsec/page,%d\n", #x, (int)(ds->perpage.x / ds->npages)); 2466ca3e8d88SDave Plauger PERPAGES; 2467ca3e8d88SDave Plauger #undef PERPAGE 2468ca3e8d88SDave Plauger P("freebufq.empty,%d\n", (int)(ds->freebufq.empty / 2469ca3e8d88SDave Plauger ds->npages)); 2470ca3e8d88SDave Plauger P("helperq.empty,%d\n", (int)(ds->helperq.empty / 2471ca3e8d88SDave Plauger ds->npages)); 2472ca3e8d88SDave Plauger P("writerq.empty,%d\n", (int)(ds->writerq.empty / 2473ca3e8d88SDave Plauger ds->npages)); 2474ca3e8d88SDave Plauger P("mainq.empty,%d\n", (int)(ds->mainq.empty / ds->npages)); 2475ca3e8d88SDave Plauger 2476ca3e8d88SDave Plauger P("I/O wait nsec/page,%llu\n", (u_longlong_t)(ds->iowait / 2477ca3e8d88SDave Plauger ds->npages)); 24787c478bd9Sstevel@tonic-gate } 2479ca3e8d88SDave Plauger #undef P 2480ca3e8d88SDave Plauger if (p < e) 2481ca3e8d88SDave Plauger bzero(p, e - p); 2482ca3e8d88SDave Plauger return (p - buf); 24837c478bd9Sstevel@tonic-gate } 2484ca3e8d88SDave Plauger #endif /* COLLECT_METRICS */ 24857c478bd9Sstevel@tonic-gate 24867c478bd9Sstevel@tonic-gate /* 24877c478bd9Sstevel@tonic-gate * Dump the system. 24887c478bd9Sstevel@tonic-gate */ 24897c478bd9Sstevel@tonic-gate void 24907c478bd9Sstevel@tonic-gate dumpsys(void) 24917c478bd9Sstevel@tonic-gate { 2492ca3e8d88SDave Plauger dumpsync_t *ds = &dumpsync; 2493ca3e8d88SDave Plauger taskq_t *livetaskq = NULL; 24947c478bd9Sstevel@tonic-gate pfn_t pfn; 24957c478bd9Sstevel@tonic-gate pgcnt_t bitnum; 24967c478bd9Sstevel@tonic-gate proc_t *p; 2497ca3e8d88SDave Plauger helper_t *hp, *hpend = &dumpcfg.helper[dumpcfg.nhelper]; 2498ca3e8d88SDave Plauger cbuf_t *cp; 24997c478bd9Sstevel@tonic-gate pid_t npids, pidx; 25007c478bd9Sstevel@tonic-gate char *content; 25019dd77bc8SDave Plauger char *buf; 25029dd77bc8SDave Plauger size_t size; 2503ca3e8d88SDave Plauger int save_dump_clevel; 2504ca3e8d88SDave Plauger dumpmlw_t mlw; 2505ca3e8d88SDave Plauger dumpcsize_t datatag; 2506ca3e8d88SDave Plauger dumpdatahdr_t datahdr; 25077c478bd9Sstevel@tonic-gate 25087c478bd9Sstevel@tonic-gate if (dumpvp == NULL || dumphdr == NULL) { 25097c478bd9Sstevel@tonic-gate uprintf("skipping system dump - no dump device configured\n"); 2510ca3e8d88SDave Plauger if (panicstr) { 2511ca3e8d88SDave Plauger dumpcfg.helpers_wanted = 0; 2512ca3e8d88SDave Plauger dumpsys_spinunlock(&dumpcfg.helper_lock); 2513ca3e8d88SDave Plauger } 25147c478bd9Sstevel@tonic-gate return; 25157c478bd9Sstevel@tonic-gate } 2516ca3e8d88SDave Plauger dumpbuf.cur = dumpbuf.start; 2517ca3e8d88SDave Plauger 2518ca3e8d88SDave Plauger /* clear the sync variables */ 2519ca3e8d88SDave Plauger ASSERT(dumpcfg.nhelper > 0); 2520ca3e8d88SDave Plauger bzero(ds, sizeof (*ds)); 2521ca3e8d88SDave Plauger ds->dumpcpu = CPU->cpu_id; 25227c478bd9Sstevel@tonic-gate 25237c478bd9Sstevel@tonic-gate /* 25247c478bd9Sstevel@tonic-gate * Calculate the starting block for dump. If we're dumping on a 25257c478bd9Sstevel@tonic-gate * swap device, start 1/5 of the way in; otherwise, start at the 25267c478bd9Sstevel@tonic-gate * beginning. And never use the first page -- it may be a disk label. 25277c478bd9Sstevel@tonic-gate */ 25287c478bd9Sstevel@tonic-gate if (dumpvp->v_flag & VISSWAP) 25297c478bd9Sstevel@tonic-gate dumphdr->dump_start = P2ROUNDUP(dumpvp_size / 5, DUMP_OFFSET); 25307c478bd9Sstevel@tonic-gate else 25317c478bd9Sstevel@tonic-gate dumphdr->dump_start = DUMP_OFFSET; 25327c478bd9Sstevel@tonic-gate 2533ca3e8d88SDave Plauger dumphdr->dump_flags = DF_VALID | DF_COMPLETE | DF_LIVE | DF_COMPRESSED; 25347c478bd9Sstevel@tonic-gate dumphdr->dump_crashtime = gethrestime_sec(); 25357c478bd9Sstevel@tonic-gate dumphdr->dump_npages = 0; 25367c478bd9Sstevel@tonic-gate dumphdr->dump_nvtop = 0; 2537ca3e8d88SDave Plauger bzero(dumpcfg.bitmap, BT_SIZEOFMAP(dumpcfg.bitmapsize)); 25387c478bd9Sstevel@tonic-gate dump_timeleft = dump_timeout; 25397c478bd9Sstevel@tonic-gate 25407c478bd9Sstevel@tonic-gate if (panicstr) { 25417c478bd9Sstevel@tonic-gate dumphdr->dump_flags &= ~DF_LIVE; 2542da6c28aaSamw (void) VOP_DUMPCTL(dumpvp, DUMP_FREE, NULL, NULL); 2543da6c28aaSamw (void) VOP_DUMPCTL(dumpvp, DUMP_ALLOC, NULL, NULL); 25447c478bd9Sstevel@tonic-gate (void) vsnprintf(dumphdr->dump_panicstring, DUMP_PANICSIZE, 25457c478bd9Sstevel@tonic-gate panicstr, panicargs); 2546ca3e8d88SDave Plauger 25477c478bd9Sstevel@tonic-gate } 25487c478bd9Sstevel@tonic-gate 25497c478bd9Sstevel@tonic-gate if (dump_conflags & DUMP_ALL) 25507c478bd9Sstevel@tonic-gate content = "all"; 25517c478bd9Sstevel@tonic-gate else if (dump_conflags & DUMP_CURPROC) 25527c478bd9Sstevel@tonic-gate content = "kernel + curproc"; 25537c478bd9Sstevel@tonic-gate else 25547c478bd9Sstevel@tonic-gate content = "kernel"; 25557c478bd9Sstevel@tonic-gate uprintf("dumping to %s, offset %lld, content: %s\n", dumppath, 25567c478bd9Sstevel@tonic-gate dumphdr->dump_start, content); 25577c478bd9Sstevel@tonic-gate 2558ca3e8d88SDave Plauger /* Make sure nodename is current */ 2559ca3e8d88SDave Plauger bcopy(utsname.nodename, dumphdr->dump_utsname.nodename, SYS_NMLN); 2560ca3e8d88SDave Plauger 2561ca3e8d88SDave Plauger /* 2562ca3e8d88SDave Plauger * If this is a live dump, try to open a VCHR vnode for better 2563ca3e8d88SDave Plauger * performance. We must take care to flush the buffer cache 2564ca3e8d88SDave Plauger * first. 2565ca3e8d88SDave Plauger */ 2566ca3e8d88SDave Plauger if (!panicstr) { 2567ca3e8d88SDave Plauger vnode_t *cdev_vp, *cmn_cdev_vp; 2568ca3e8d88SDave Plauger 2569ca3e8d88SDave Plauger ASSERT(dumpbuf.cdev_vp == NULL); 2570ca3e8d88SDave Plauger cdev_vp = makespecvp(VTOS(dumpvp)->s_dev, VCHR); 2571ca3e8d88SDave Plauger if (cdev_vp != NULL) { 2572ca3e8d88SDave Plauger cmn_cdev_vp = common_specvp(cdev_vp); 2573ca3e8d88SDave Plauger if (VOP_OPEN(&cmn_cdev_vp, FREAD | FWRITE, kcred, NULL) 2574ca3e8d88SDave Plauger == 0) { 2575ca3e8d88SDave Plauger if (vn_has_cached_data(dumpvp)) 2576ca3e8d88SDave Plauger (void) pvn_vplist_dirty(dumpvp, 0, NULL, 2577ca3e8d88SDave Plauger B_INVAL | B_TRUNC, kcred); 2578ca3e8d88SDave Plauger dumpbuf.cdev_vp = cmn_cdev_vp; 2579ca3e8d88SDave Plauger } else { 2580ca3e8d88SDave Plauger VN_RELE(cdev_vp); 2581ca3e8d88SDave Plauger } 2582ca3e8d88SDave Plauger } 2583ca3e8d88SDave Plauger } 2584ca3e8d88SDave Plauger 2585d3d50737SRafael Vanoni /* 2586d3d50737SRafael Vanoni * Store a hires timestamp so we can look it up during debugging. 2587d3d50737SRafael Vanoni */ 2588d3d50737SRafael Vanoni lbolt_debug_entry(); 2589d3d50737SRafael Vanoni 25907c478bd9Sstevel@tonic-gate /* 25917c478bd9Sstevel@tonic-gate * Leave room for the message and ereport save areas and terminal dump 25927c478bd9Sstevel@tonic-gate * header. 25937c478bd9Sstevel@tonic-gate */ 2594ca3e8d88SDave Plauger dumpbuf.vp_limit = dumpvp_size - DUMP_LOGSIZE - DUMP_OFFSET - 2595ca3e8d88SDave Plauger DUMP_ERPTSIZE; 25967c478bd9Sstevel@tonic-gate 25977c478bd9Sstevel@tonic-gate /* 25987c478bd9Sstevel@tonic-gate * Write out the symbol table. It's no longer compressed, 25997c478bd9Sstevel@tonic-gate * so its 'size' and 'csize' are equal. 26007c478bd9Sstevel@tonic-gate */ 2601ca3e8d88SDave Plauger dumpbuf.vp_off = dumphdr->dump_ksyms = dumphdr->dump_start + PAGESIZE; 26027c478bd9Sstevel@tonic-gate dumphdr->dump_ksyms_size = dumphdr->dump_ksyms_csize = 26037c478bd9Sstevel@tonic-gate ksyms_snapshot(dumpvp_ksyms_write, NULL, LONG_MAX); 26047c478bd9Sstevel@tonic-gate 26057c478bd9Sstevel@tonic-gate /* 26067c478bd9Sstevel@tonic-gate * Write out the translation map. 26077c478bd9Sstevel@tonic-gate */ 26087c478bd9Sstevel@tonic-gate dumphdr->dump_map = dumpvp_flush(); 26097c478bd9Sstevel@tonic-gate dump_as(&kas); 2610ae115bc7Smrj dumphdr->dump_nvtop += dump_plat_addr(); 26117c478bd9Sstevel@tonic-gate 26127c478bd9Sstevel@tonic-gate /* 26137c478bd9Sstevel@tonic-gate * call into hat, which may have unmapped pages that also need to 26147c478bd9Sstevel@tonic-gate * be in the dump 26157c478bd9Sstevel@tonic-gate */ 26167c478bd9Sstevel@tonic-gate hat_dump(); 26177c478bd9Sstevel@tonic-gate 26187c478bd9Sstevel@tonic-gate if (dump_conflags & DUMP_ALL) { 26197c478bd9Sstevel@tonic-gate mutex_enter(&pidlock); 26207c478bd9Sstevel@tonic-gate 26217c478bd9Sstevel@tonic-gate for (npids = 0, p = practive; p != NULL; p = p->p_next) 2622ca3e8d88SDave Plauger dumpcfg.pids[npids++] = p->p_pid; 26237c478bd9Sstevel@tonic-gate 26247c478bd9Sstevel@tonic-gate mutex_exit(&pidlock); 26257c478bd9Sstevel@tonic-gate 26267c478bd9Sstevel@tonic-gate for (pidx = 0; pidx < npids; pidx++) 2627ca3e8d88SDave Plauger (void) dump_process(dumpcfg.pids[pidx]); 26287c478bd9Sstevel@tonic-gate 2629*86f21945SDave Plauger dump_init_memlist_walker(&mlw); 2630ca3e8d88SDave Plauger for (bitnum = 0; bitnum < dumpcfg.bitmapsize; bitnum++) { 26317c478bd9Sstevel@tonic-gate dump_timeleft = dump_timeout; 2632b280b2a3SStuart Maybee pfn = dump_bitnum_to_pfn(bitnum, &mlw); 2633b280b2a3SStuart Maybee /* 2634b280b2a3SStuart Maybee * Some hypervisors do not have all pages available to 2635b280b2a3SStuart Maybee * be accessed by the guest OS. Check for page 2636b280b2a3SStuart Maybee * accessibility. 2637b280b2a3SStuart Maybee */ 2638b280b2a3SStuart Maybee if (plat_hold_page(pfn, PLAT_HOLD_NO_LOCK, NULL) != 2639b280b2a3SStuart Maybee PLAT_HOLD_OK) 2640b280b2a3SStuart Maybee continue; 2641ca3e8d88SDave Plauger BT_SET(dumpcfg.bitmap, bitnum); 26427c478bd9Sstevel@tonic-gate } 2643ca3e8d88SDave Plauger dumphdr->dump_npages = dumpcfg.bitmapsize; 26447c478bd9Sstevel@tonic-gate dumphdr->dump_flags |= DF_ALL; 26457c478bd9Sstevel@tonic-gate 26467c478bd9Sstevel@tonic-gate } else if (dump_conflags & DUMP_CURPROC) { 26477c478bd9Sstevel@tonic-gate /* 26487c478bd9Sstevel@tonic-gate * Determine which pid is to be dumped. If we're panicking, we 26497c478bd9Sstevel@tonic-gate * dump the process associated with panic_thread (if any). If 26507c478bd9Sstevel@tonic-gate * this is a live dump, we dump the process associated with 26517c478bd9Sstevel@tonic-gate * curthread. 26527c478bd9Sstevel@tonic-gate */ 26537c478bd9Sstevel@tonic-gate npids = 0; 26547c478bd9Sstevel@tonic-gate if (panicstr) { 26557c478bd9Sstevel@tonic-gate if (panic_thread != NULL && 26567c478bd9Sstevel@tonic-gate panic_thread->t_procp != NULL && 26577c478bd9Sstevel@tonic-gate panic_thread->t_procp != &p0) { 2658ca3e8d88SDave Plauger dumpcfg.pids[npids++] = 26597c478bd9Sstevel@tonic-gate panic_thread->t_procp->p_pid; 26607c478bd9Sstevel@tonic-gate } 26617c478bd9Sstevel@tonic-gate } else { 2662ca3e8d88SDave Plauger dumpcfg.pids[npids++] = curthread->t_procp->p_pid; 26637c478bd9Sstevel@tonic-gate } 26647c478bd9Sstevel@tonic-gate 2665ca3e8d88SDave Plauger if (npids && dump_process(dumpcfg.pids[0]) == 0) 26667c478bd9Sstevel@tonic-gate dumphdr->dump_flags |= DF_CURPROC; 26677c478bd9Sstevel@tonic-gate else 26687c478bd9Sstevel@tonic-gate dumphdr->dump_flags |= DF_KERNEL; 26697c478bd9Sstevel@tonic-gate 26707c478bd9Sstevel@tonic-gate } else { 26717c478bd9Sstevel@tonic-gate dumphdr->dump_flags |= DF_KERNEL; 26727c478bd9Sstevel@tonic-gate } 26737c478bd9Sstevel@tonic-gate 26747c478bd9Sstevel@tonic-gate dumphdr->dump_hashmask = (1 << highbit(dumphdr->dump_nvtop - 1)) - 1; 26757c478bd9Sstevel@tonic-gate 26767c478bd9Sstevel@tonic-gate /* 26777c478bd9Sstevel@tonic-gate * Write out the pfn table. 26787c478bd9Sstevel@tonic-gate */ 26797c478bd9Sstevel@tonic-gate dumphdr->dump_pfn = dumpvp_flush(); 2680ca3e8d88SDave Plauger dump_init_memlist_walker(&mlw); 2681ca3e8d88SDave Plauger for (bitnum = 0; bitnum < dumpcfg.bitmapsize; bitnum++) { 26827c478bd9Sstevel@tonic-gate dump_timeleft = dump_timeout; 2683ca3e8d88SDave Plauger if (!BT_TEST(dumpcfg.bitmap, bitnum)) 26847c478bd9Sstevel@tonic-gate continue; 2685ca3e8d88SDave Plauger pfn = dump_bitnum_to_pfn(bitnum, &mlw); 26867c478bd9Sstevel@tonic-gate ASSERT(pfn != PFN_INVALID); 26877c478bd9Sstevel@tonic-gate dumpvp_write(&pfn, sizeof (pfn_t)); 26887c478bd9Sstevel@tonic-gate } 2689ae115bc7Smrj dump_plat_pfn(); 26907c478bd9Sstevel@tonic-gate 26917c478bd9Sstevel@tonic-gate /* 26927c478bd9Sstevel@tonic-gate * Write out all the pages. 2693ca3e8d88SDave Plauger * Map pages, copy them handling UEs, compress, and write them out. 2694ca3e8d88SDave Plauger * Cooperate with any helpers running on CPUs in panic_idle(). 26957c478bd9Sstevel@tonic-gate */ 26967c478bd9Sstevel@tonic-gate dumphdr->dump_data = dumpvp_flush(); 2697ca3e8d88SDave Plauger 2698ca3e8d88SDave Plauger bzero(dumpcfg.helpermap, BT_SIZEOFMAP(NCPU)); 2699ca3e8d88SDave Plauger ds->live = dumpcfg.clevel > 0 && 2700ca3e8d88SDave Plauger (dumphdr->dump_flags & DF_LIVE) != 0; 2701ca3e8d88SDave Plauger 2702ca3e8d88SDave Plauger save_dump_clevel = dumpcfg.clevel; 2703ca3e8d88SDave Plauger if (panicstr) 2704ca3e8d88SDave Plauger dumpsys_get_maxmem(); 2705ca3e8d88SDave Plauger else if (dumpcfg.clevel >= DUMP_CLEVEL_BZIP2) 2706ca3e8d88SDave Plauger dumpcfg.clevel = DUMP_CLEVEL_LZJB; 2707ca3e8d88SDave Plauger 2708ca3e8d88SDave Plauger dumpcfg.nhelper_used = 0; 2709ca3e8d88SDave Plauger for (hp = dumpcfg.helper; hp != hpend; hp++) { 2710ca3e8d88SDave Plauger if (hp->page == NULL) { 2711ca3e8d88SDave Plauger hp->helper = DONEHELPER; 27127c478bd9Sstevel@tonic-gate continue; 2713ca3e8d88SDave Plauger } 2714ca3e8d88SDave Plauger ++dumpcfg.nhelper_used; 2715ca3e8d88SDave Plauger hp->helper = FREEHELPER; 2716ca3e8d88SDave Plauger hp->taskqid = NULL; 2717ca3e8d88SDave Plauger hp->ds = ds; 2718ca3e8d88SDave Plauger bzero(&hp->perpage, sizeof (hp->perpage)); 2719ca3e8d88SDave Plauger if (dumpcfg.clevel >= DUMP_CLEVEL_BZIP2) 2720ca3e8d88SDave Plauger (void) BZ2_bzCompressReset(&hp->bzstream); 2721ca3e8d88SDave Plauger } 27227c478bd9Sstevel@tonic-gate 2723ca3e8d88SDave Plauger CQ_OPEN(freebufq); 2724ca3e8d88SDave Plauger CQ_OPEN(helperq); 2725ca3e8d88SDave Plauger 2726ca3e8d88SDave Plauger dumpcfg.ncbuf_used = 0; 2727ca3e8d88SDave Plauger for (cp = dumpcfg.cbuf; cp != &dumpcfg.cbuf[dumpcfg.ncbuf]; cp++) { 2728ca3e8d88SDave Plauger if (cp->buf != NULL) { 2729ca3e8d88SDave Plauger CQ_PUT(freebufq, cp, CBUF_FREEBUF); 2730ca3e8d88SDave Plauger ++dumpcfg.ncbuf_used; 27317c478bd9Sstevel@tonic-gate } 2732ca3e8d88SDave Plauger } 2733ca3e8d88SDave Plauger 2734ca3e8d88SDave Plauger for (cp = dumpcfg.cmap; cp != &dumpcfg.cmap[dumpcfg.ncmap]; cp++) 2735ca3e8d88SDave Plauger CQ_PUT(mainq, cp, CBUF_FREEMAP); 2736ca3e8d88SDave Plauger 2737ca3e8d88SDave Plauger ds->start = gethrtime(); 2738ca3e8d88SDave Plauger ds->iowaitts = ds->start; 2739ca3e8d88SDave Plauger 2740ca3e8d88SDave Plauger /* start helpers */ 2741ca3e8d88SDave Plauger if (ds->live) { 2742ca3e8d88SDave Plauger int n = dumpcfg.nhelper_used; 2743ca3e8d88SDave Plauger int pri = MINCLSYSPRI - 25; 2744ca3e8d88SDave Plauger 2745ca3e8d88SDave Plauger livetaskq = taskq_create("LiveDump", n, pri, n, n, 2746ca3e8d88SDave Plauger TASKQ_PREPOPULATE); 2747ca3e8d88SDave Plauger for (hp = dumpcfg.helper; hp != hpend; hp++) { 2748ca3e8d88SDave Plauger if (hp->page == NULL) 2749ca3e8d88SDave Plauger continue; 2750ca3e8d88SDave Plauger hp->helper = hp - dumpcfg.helper; 2751ca3e8d88SDave Plauger hp->taskqid = taskq_dispatch(livetaskq, 2752ca3e8d88SDave Plauger dumpsys_live_helper, (void *)hp, TQ_NOSLEEP); 27537c478bd9Sstevel@tonic-gate } 2754ca3e8d88SDave Plauger 2755ca3e8d88SDave Plauger } else { 27569dd77bc8SDave Plauger if (panicstr) 27579dd77bc8SDave Plauger kmem_dump_begin(); 2758ca3e8d88SDave Plauger dumpcfg.helpers_wanted = dumpcfg.clevel > 0; 2759ca3e8d88SDave Plauger dumpsys_spinunlock(&dumpcfg.helper_lock); 27607c478bd9Sstevel@tonic-gate } 27617c478bd9Sstevel@tonic-gate 2762ca3e8d88SDave Plauger /* run main task */ 2763ca3e8d88SDave Plauger dumpsys_main_task(ds); 2764ca3e8d88SDave Plauger 2765ca3e8d88SDave Plauger ds->elapsed = gethrtime() - ds->start; 2766ca3e8d88SDave Plauger if (ds->elapsed < 1) 2767ca3e8d88SDave Plauger ds->elapsed = 1; 2768ca3e8d88SDave Plauger 2769ca3e8d88SDave Plauger if (livetaskq != NULL) 2770ca3e8d88SDave Plauger taskq_destroy(livetaskq); 2771ca3e8d88SDave Plauger 2772ca3e8d88SDave Plauger if (ds->neednl) { 2773ca3e8d88SDave Plauger uprintf("\n"); 2774ca3e8d88SDave Plauger ds->neednl = 0; 2775ca3e8d88SDave Plauger } 2776ca3e8d88SDave Plauger 2777ca3e8d88SDave Plauger /* record actual pages dumped */ 2778ca3e8d88SDave Plauger dumphdr->dump_npages = ds->npages; 2779ca3e8d88SDave Plauger 2780ca3e8d88SDave Plauger /* platform-specific data */ 2781ca3e8d88SDave Plauger dumphdr->dump_npages += dump_plat_data(dumpcfg.cbuf[0].buf); 2782ca3e8d88SDave Plauger 2783ca3e8d88SDave Plauger /* note any errors by clearing DF_COMPLETE */ 2784ca3e8d88SDave Plauger if (dump_ioerr || ds->npages < dumphdr->dump_npages) 2785ca3e8d88SDave Plauger dumphdr->dump_flags &= ~DF_COMPLETE; 2786ca3e8d88SDave Plauger 2787ca3e8d88SDave Plauger /* end of stream blocks */ 2788ca3e8d88SDave Plauger datatag = 0; 2789ca3e8d88SDave Plauger dumpvp_write(&datatag, sizeof (datatag)); 2790ca3e8d88SDave Plauger 2791ca3e8d88SDave Plauger bzero(&datahdr, sizeof (datahdr)); 27929dd77bc8SDave Plauger 27939dd77bc8SDave Plauger /* buffer for metrics */ 27949dd77bc8SDave Plauger buf = dumpcfg.cbuf[0].buf; 27959dd77bc8SDave Plauger size = MIN(dumpcfg.cbuf[0].size, DUMP_OFFSET - sizeof (dumphdr_t) - 27969dd77bc8SDave Plauger sizeof (dumpdatahdr_t)); 27979dd77bc8SDave Plauger 27989dd77bc8SDave Plauger /* finish the kmem intercepts, collect kmem verbose info */ 27999dd77bc8SDave Plauger if (panicstr) { 28009dd77bc8SDave Plauger datahdr.dump_metrics = kmem_dump_finish(buf, size); 28019dd77bc8SDave Plauger buf += datahdr.dump_metrics; 28029dd77bc8SDave Plauger size -= datahdr.dump_metrics; 28039dd77bc8SDave Plauger } 28049dd77bc8SDave Plauger 28059dd77bc8SDave Plauger /* compression info in data header */ 2806ca3e8d88SDave Plauger datahdr.dump_datahdr_magic = DUMP_DATAHDR_MAGIC; 2807ca3e8d88SDave Plauger datahdr.dump_datahdr_version = DUMP_DATAHDR_VERSION; 2808ca3e8d88SDave Plauger datahdr.dump_maxcsize = CBUF_SIZE; 2809ca3e8d88SDave Plauger datahdr.dump_maxrange = CBUF_MAPSIZE / PAGESIZE; 2810ca3e8d88SDave Plauger datahdr.dump_nstreams = dumpcfg.nhelper_used; 2811ca3e8d88SDave Plauger datahdr.dump_clevel = dumpcfg.clevel; 2812ca3e8d88SDave Plauger #ifdef COLLECT_METRICS 2813ca3e8d88SDave Plauger if (dump_metrics_on) 28149dd77bc8SDave Plauger datahdr.dump_metrics += dumpsys_metrics(ds, buf, size); 2815ca3e8d88SDave Plauger #endif 2816ca3e8d88SDave Plauger datahdr.dump_data_csize = dumpvp_flush() - dumphdr->dump_data; 28177c478bd9Sstevel@tonic-gate 28187c478bd9Sstevel@tonic-gate /* 28197c478bd9Sstevel@tonic-gate * Write out the initial and terminal dump headers. 28207c478bd9Sstevel@tonic-gate */ 2821ca3e8d88SDave Plauger dumpbuf.vp_off = dumphdr->dump_start; 28227c478bd9Sstevel@tonic-gate dumpvp_write(dumphdr, sizeof (dumphdr_t)); 28237c478bd9Sstevel@tonic-gate (void) dumpvp_flush(); 28247c478bd9Sstevel@tonic-gate 2825ca3e8d88SDave Plauger dumpbuf.vp_limit = dumpvp_size; 2826ca3e8d88SDave Plauger dumpbuf.vp_off = dumpbuf.vp_limit - DUMP_OFFSET; 28277c478bd9Sstevel@tonic-gate dumpvp_write(dumphdr, sizeof (dumphdr_t)); 2828ca3e8d88SDave Plauger dumpvp_write(&datahdr, sizeof (dumpdatahdr_t)); 2829ca3e8d88SDave Plauger dumpvp_write(dumpcfg.cbuf[0].buf, datahdr.dump_metrics); 28307c478bd9Sstevel@tonic-gate 2831ca3e8d88SDave Plauger (void) dumpvp_flush(); 28327c478bd9Sstevel@tonic-gate 2833ca3e8d88SDave Plauger uprintf("\r%3d%% done: %llu pages dumped, ", 2834ca3e8d88SDave Plauger ds->percent_done, (u_longlong_t)ds->npages); 28357c478bd9Sstevel@tonic-gate 28367c478bd9Sstevel@tonic-gate if (dump_ioerr == 0) { 28377c478bd9Sstevel@tonic-gate uprintf("dump succeeded\n"); 28387c478bd9Sstevel@tonic-gate } else { 28397c478bd9Sstevel@tonic-gate uprintf("dump failed: error %d\n", dump_ioerr); 2840ca3e8d88SDave Plauger #ifdef DEBUG 2841ca3e8d88SDave Plauger if (panicstr) 28427c478bd9Sstevel@tonic-gate debug_enter("dump failed"); 2843ca3e8d88SDave Plauger #endif 28447c478bd9Sstevel@tonic-gate } 28457c478bd9Sstevel@tonic-gate 28467c478bd9Sstevel@tonic-gate /* 28477c478bd9Sstevel@tonic-gate * Write out all undelivered messages. This has to be the *last* 28487c478bd9Sstevel@tonic-gate * thing we do because the dump process itself emits messages. 28497c478bd9Sstevel@tonic-gate */ 28507c478bd9Sstevel@tonic-gate if (panicstr) { 28517c478bd9Sstevel@tonic-gate dump_ereports(); 28527c478bd9Sstevel@tonic-gate dump_messages(); 28537c478bd9Sstevel@tonic-gate } 28547c478bd9Sstevel@tonic-gate 28557c478bd9Sstevel@tonic-gate delay(2 * hz); /* let people see the 'done' message */ 28567c478bd9Sstevel@tonic-gate dump_timeleft = 0; 28577c478bd9Sstevel@tonic-gate dump_ioerr = 0; 2858ca3e8d88SDave Plauger 2859ca3e8d88SDave Plauger /* restore settings after live dump completes */ 2860ca3e8d88SDave Plauger if (!panicstr) { 2861ca3e8d88SDave Plauger dumpcfg.clevel = save_dump_clevel; 2862ca3e8d88SDave Plauger 2863ca3e8d88SDave Plauger /* release any VCHR open of the dump device */ 2864ca3e8d88SDave Plauger if (dumpbuf.cdev_vp != NULL) { 2865ca3e8d88SDave Plauger (void) VOP_CLOSE(dumpbuf.cdev_vp, FREAD | FWRITE, 1, 0, 2866ca3e8d88SDave Plauger kcred, NULL); 2867ca3e8d88SDave Plauger VN_RELE(dumpbuf.cdev_vp); 2868ca3e8d88SDave Plauger dumpbuf.cdev_vp = NULL; 2869ca3e8d88SDave Plauger } 2870ca3e8d88SDave Plauger } 28717c478bd9Sstevel@tonic-gate } 28727c478bd9Sstevel@tonic-gate 28737c478bd9Sstevel@tonic-gate /* 28747c478bd9Sstevel@tonic-gate * This function is called whenever the memory size, as represented 28757c478bd9Sstevel@tonic-gate * by the phys_install list, changes. 28767c478bd9Sstevel@tonic-gate */ 28777c478bd9Sstevel@tonic-gate void 28787c478bd9Sstevel@tonic-gate dump_resize() 28797c478bd9Sstevel@tonic-gate { 28807c478bd9Sstevel@tonic-gate mutex_enter(&dump_lock); 28817c478bd9Sstevel@tonic-gate dumphdr_init(); 28827c478bd9Sstevel@tonic-gate dumpbuf_resize(); 2883ca3e8d88SDave Plauger dump_update_clevel(); 28847c478bd9Sstevel@tonic-gate mutex_exit(&dump_lock); 28857c478bd9Sstevel@tonic-gate } 2886e7cbe64fSgw 2887e7cbe64fSgw /* 2888e7cbe64fSgw * This function allows for dynamic resizing of a dump area. It assumes that 2889e7cbe64fSgw * the underlying device has update its appropriate size(9P). 2890e7cbe64fSgw */ 2891e7cbe64fSgw int 2892e7cbe64fSgw dumpvp_resize() 2893e7cbe64fSgw { 2894e7cbe64fSgw int error; 2895e7cbe64fSgw vattr_t vattr; 2896e7cbe64fSgw 2897e7cbe64fSgw mutex_enter(&dump_lock); 2898e7cbe64fSgw vattr.va_mask = AT_SIZE; 2899e7cbe64fSgw if ((error = VOP_GETATTR(dumpvp, &vattr, 0, kcred, NULL)) != 0) { 2900e7cbe64fSgw mutex_exit(&dump_lock); 2901e7cbe64fSgw return (error); 2902e7cbe64fSgw } 2903e7cbe64fSgw 2904e7cbe64fSgw if (error == 0 && vattr.va_size < 2 * DUMP_LOGSIZE + DUMP_ERPTSIZE) { 2905e7cbe64fSgw mutex_exit(&dump_lock); 2906e7cbe64fSgw return (ENOSPC); 2907e7cbe64fSgw } 2908e7cbe64fSgw 2909e7cbe64fSgw dumpvp_size = vattr.va_size & -DUMP_OFFSET; 2910e7cbe64fSgw mutex_exit(&dump_lock); 2911e7cbe64fSgw return (0); 2912e7cbe64fSgw } 2913