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authorPeter Zijlstra <peterz@infradead.org>2008-04-29 10:02:46 +0200
committerIngo Molnar <mingo@elte.hu>2008-05-05 23:56:18 +0200
commitb328ca182f01c2a04b85e0ee8a410720b104fbcc (patch)
treed04ba3472a8f57788fb7e6e614e8e6b3c5a79b55 /.gitignore
parent104f64549c961a797ff5f7c59946a7caa335c5b0 (diff)
sched: fix hrtick_start_fair and CPU-Hotplug
Gautham R Shenoy reported: > While running the usual CPU-Hotplug stress tests on linux-2.6.25, > I noticed the following in the console logs. > > This is a wee bit difficult to reproduce. In the past 10 runs I hit this > only once. > > ------------[ cut here ]------------ > > WARNING: at kernel/sched.c:962 hrtick+0x2e/0x65() > > Just wondering if we are doing a good job at handling the cancellation > of any per-cpu scheduler timers during CPU-Hotplug. This looks like its indeed not cancelled at all and migrates the it to another cpu. Fix it via a proper hotplug notifier mechanism. Reported-by: Gautham R Shenoy <ego@in.ibm.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: stable@kernel.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
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