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authorRoland McGrath <roland@redhat.com>2008-07-25 19:45:58 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-26 12:00:09 -0700
commit85ba2d862e521375a8ee01526c5c46b1f24bb4af (patch)
treef098555cb580b2864f145aa845b574f07d2cf694 /lib/Makefile
parent1f5a4ad97a0e7b663d527ecc02aabe203d000d91 (diff)
tracehook: wait_task_inactive
This extends wait_task_inactive() with a new argument so it can be used in a "soft" mode where it will check for the task changing state unexpectedly and back off. There is no change to existing callers. This lays the groundwork to allow robust, noninvasive tracing that can try to sample a blocked thread but back off safely if it wakes up. Signed-off-by: Roland McGrath <roland@redhat.com> Cc: Oleg Nesterov <oleg@tv-sign.ru> Reviewed-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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