From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: ego@in.ibm.com
Cc: Ingo Molnar <mingo@elte.hu>,
Dhaval Giani <dhaval@linux.vnet.ibm.com>,
Srivatsa Vaddagiri <vatsa@in.ibm.com>,
Balbir Singh <balbir@in.ibm.com>,
linux-kernel@vger.kernel.org
Subject: Re: [BUG-REPORT] hrtick_start_fair and CPU-Hotplug
Date: Tue, 29 Apr 2008 08:59:19 +0200 [thread overview]
Message-ID: <1209452359.13978.26.camel@twins> (raw)
In-Reply-To: <20080429065211.GB7859@in.ibm.com>
On Tue, 2008-04-29 at 12:22 +0530, Gautham R Shenoy wrote:
> 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()
> 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.
next prev parent reply other threads:[~2008-04-29 6:59 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-29 6:52 [BUG-REPORT] hrtick_start_fair and CPU-Hotplug Gautham R Shenoy
2008-04-29 6:59 ` Peter Zijlstra [this message]
2008-04-29 8:02 ` Peter Zijlstra
2008-04-29 9:46 ` Ingo Molnar
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