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Re: [BUG-REPORT] hrtick_start_fair and CPU-Hotplug
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From: Peter Zijlstra
Subject:
Re: [BUG-REPORT] hrtick_start_fair and CPU-Hotplug
Date: Monday, April 28, 2008 - 11:59 pm
On Tue, 2008-04-29 at 12:22 +0530, Gautham R Shenoy wrote:
quoted text
> Hello! > > 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()
quoted text
> I am not well versed with this part of the code, so 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 not cancelled at all and migrates the it to another cpu. I'll see what I can come up with. --
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Messages in current thread:
[BUG-REPORT] hrtick_start_fair and CPU-Hotplug
, Gautham R Shenoy
, (Mon Apr 28, 11:52 pm)
Re: [BUG-REPORT] hrtick_start_fair and CPU-Hotplug
, Peter Zijlstra
, (Mon Apr 28, 11:59 pm)
Re: [BUG-REPORT] hrtick_start_fair and CPU-Hotplug
, Peter Zijlstra
, (Tue Apr 29, 1:02 am)
Re: [BUG-REPORT] hrtick_start_fair and CPU-Hotplug
, Ingo Molnar
, (Tue Apr 29, 2:46 am)
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