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>

6351664 swapin calling lwp_swapin without a valid mpcb - causes panic

6272865 race condition between SIGKILL and /proc PCAGENT

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