6901962 Tickless clock made tcp confuse 32 and 64 bit timestamps
6902263 latent struct sizing bug in clock_init()

PSARC/2009/396 Tickless Kernel Architecture / lbolt decoupling
6860030 tickless clock requires a clock() decoupled lbolt / lbolt64
Portions contributed by Chad Mynhier <cmynhier@gmail.com>

6811269 The clock tick accounting code uses softints wrongly
6802283 hang in delay() called from glm during boot
6810916 sparc system repeatedly hangs doing mpt tasks
6811294 APIs like na

6811269 The clock tick accounting code uses softints wrongly
6802283 hang in delay() called from glm during boot
6810916 sparc system repeatedly hangs doing mpt tasks
6811294 APIs like nanosleep() wakeup prematurely when system time is changed
6809548 assertion failure expiration > 0 in callout.c

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6619224 Tick accounting needs to be made scalable