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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2012-06-22 15:52:09 +0200
committerIngo Molnar <mingo@kernel.org>2012-07-05 20:58:13 +0200
commit5167e8d5417bf5c322a703d2927daec727ea40dd (patch)
treeb919aac933c104e7c7abc1730da810f60ba3229d /MAINTAINERS
parent164c33c6adee609b8b9062cce4c10f764d0dce13 (diff)
downloadlinux-5167e8d5417bf5c322a703d2927daec727ea40dd.tar.gz
sched/nohz: Rewrite and fix load-avg computation -- again
Thanks to Charles Wang for spotting the defects in the current code: - If we go idle during the sample window -- after sampling, we get a negative bias because we can negate our own sample. - If we wake up during the sample window we get a positive bias because we push the sample to a known active period. So rewrite the entire nohz load-avg muck once again, now adding copious documentation to the code. Reported-and-tested-by: Doug Smythies <dsmythies@telus.net> Reported-and-tested-by: Charles Wang <muming.wq@gmail.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: stable@kernel.org Link: http://lkml.kernel.org/r/1340373782.18025.74.camel@twins [ minor edits ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
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