Messages in this thread | | | Date | Wed, 25 Sep 2002 22:12:20 -0700 (PDT) | From | Linus Torvalds <> | Subject | Re: [patch 1/4] prepare_to_wait/finish_wait sleep/wakeup API |
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On Wed, 25 Sep 2002, David S. Miller wrote: > > Ok, so if the condition retest fails at wakeup (someone got to the > event before us), it's ok because we add ourselves back to the wait > queue first, mark ourselves as sleeping, _then_ retest.
Right. The looping case (if somebody else was first) is slowed down marginally, but the common case is sped up and needs one less time through the waitqueue lock.
Linus
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