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authorOleg Nesterov <oleg@redhat.com>2009-06-17 16:27:45 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-18 13:03:54 -0700
commit371cbb387e33651b4c1326457116568ff01ac422 (patch)
tree4678d02d44fc9764f316e5d84e5d307cc14a0923 /ipc
parent63706172f332fd3f6e7458ebfb35fa6de9c21dc5 (diff)
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kthreads: simplify migration_thread() exit path
Now that kthread_stop() can be used even if the task has already exited, we can kill the "wait_to_die:" loop in migration_thread(). But we must pin rq->migration_thread after creation. Actually, I don't think CPU_UP_CANCELED or CPU_DEAD should wait for ->migration_thread exit. Perhaps we can simplify this code a bit more. migration_call() can set ->should_stop and forget about this thread. But we need a new helper in kthred.c for that. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Pavel Emelyanov <xemul@openvz.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Vitaliy Gusev <vgusev@openvz.org Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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