| commit | efc30814a88bdbe2bfe4ac94de2eb089ad80bee3 | |
| author | Kirill Korotaev <dev@sw.ru> | |
| Tue, 27 Jun 2006 09:54:32 +0000 (27 02:54 -0700) | ||
| committer | Linus Torvalds <torvalds@g5.osdl.org> | |
| Wed, 28 Jun 2006 00:32:44 +0000 (27 17:32 -0700) | ||
| tree | 1134d7ccda13c09cf426af0524c13633292eac5b | treesnapshot (tar.gz zip) |
| parent | cc94abfcbc9fed0048365ce1fb8dc81353408bf8 | commitdiff |
[PATCH] sched: CPU hotplug race vs. set_cpus_allowed()
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>
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>
| kernel/sched.c | diffblobblamehistory |