OpenBSD / src / Wbwe5sa / Remove incorrect optimization. The current logic for skipping idle CPUs

OpenBSD/src Wbwe5sa — sys/kern kern_smr.c, sys/sys sched.h

2019-05-16 13:52:47 UTC by visa on ⎇

HEAD

   Remove incorrect optimization. The current logic for skipping idle CPUs
   does not establish strong enough ordering between CPUs. Consequently,
   smr_grace_wait() might incorrectly skip a CPU and invoke an SMR
   callback too early.

   Prompted by haesbaert@

Version	Delta		File
1.3	+3	-21	sys/kern/kern_smr.c
1.52	+1	-4	sys/sys/sched.h
	+4	-25	2 files

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