[PATCH] sched: CPU hotplug race vs. set_cpus_allowed()

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There is a race between set_cpus_allowed() and move_task_off_dead_cpu().
__migrate_task() doesn't report any err code, so task can be left on its
runqueue if its cpus_allowed mask changed so that dest_cpu is not longer a
possible target.  Also, chaning cpus_allowed mask requires rq->lock being
held.

Signed-off-by: Kirill Korotaev <dev@openvz.org>
Acked-By: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

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Kirill Korotaev 2006-06-27 02:54:32 -07:00 • committed by Linus Torvalds

parent cc94abfcbc

commit efc30814a8

1 changed files with 14 additions and 4 deletions

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18

kernel/sched.c

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