From: Heiko Carstens <heiko.carstens@de.ibm.com>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Ingo Molnar <mingo@elte.hu>, Avi Kivity <avi@qumranet.com>,
linux-kernel@vger.kernel.org,
Dmitry Adamushko <dmitry.adamushko@gmail.com>
Subject: Re: [BUG] CFS vs cpu hotplug
Date: Thu, 19 Jun 2008 23:17:48 +0200 [thread overview]
Message-ID: <20080619211748.GB6180@osiris.ibm.com> (raw)
In-Reply-To: <1213898711.3223.107.camel@lappy.programming.kicks-ass.net>
On Thu, Jun 19, 2008 at 08:05:10PM +0200, Peter Zijlstra wrote:
> On Thu, 2008-06-19 at 18:19 +0200, Heiko Carstens wrote:
> > Hi Ingo, Peter,
> >
> > I'm still seeing kernel crashes on cpu hotplug with Linus' current git tree.
> > All I have to do is to make all cpus busy (make -j4 of the kernel source is
> > sufficient) and then start cpu hotplug stress.
> > It usually takes below a minute to crash the system like this:
> >
> > Unable to handle kernel pointer dereference at virtual kernel address 005a800000031000
> > Oops: 0038 [#1] PREEMPT SMP
> > Modules linked in:
> > CPU: 1 Not tainted 2.6.26-rc6-00232-g9bedbcb #356
> > Process swapper (pid: 0, task: 000000002fe7ccf8, ksp: 000000002fe93d78)
> > Krnl PSW : 0400e00180000000 0000000000032c6c (pick_next_task_fair+0x34/0xb0)
>
> I presume this is:
>
> se = pick_next_entity(cfs_rq);
Yes, that is correct. Sorry, missed to tell about this detail.
next prev parent reply other threads:[~2008-06-19 21:18 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-19 16:19 [BUG] CFS vs cpu hotplug Heiko Carstens
2008-06-19 18:05 ` Peter Zijlstra
2008-06-19 18:14 ` Peter Zijlstra
2008-06-19 21:14 ` Heiko Carstens
2008-06-19 21:26 ` Peter Zijlstra
2008-06-19 21:17 ` Heiko Carstens [this message]
2008-06-19 21:32 ` Peter Zijlstra
2008-06-19 21:49 ` Heiko Carstens
2008-06-20 8:51 ` Peter Zijlstra
2008-06-20 22:19 ` Heiko Carstens
2008-06-20 11:44 ` Dmitry Adamushko
2008-06-20 22:23 ` Heiko Carstens
2008-06-25 22:12 ` Dmitry Adamushko
2008-06-28 22:16 ` Dmitry Adamushko
2008-06-29 6:55 ` Ingo Molnar
2008-06-30 9:07 ` Heiko Carstens
2008-06-30 9:17 ` Ingo Molnar
2008-07-01 9:22 ` Lai Jiangshan
2008-07-01 9:31 ` Ingo Molnar
2008-07-01 10:09 ` Lai Jiangshan
2008-07-02 7:13 ` Lai Jiangshan
2008-07-02 8:50 ` Dmitry Adamushko
2008-07-02 9:23 ` Lai Jiangshan
2008-07-07 10:26 ` Miao Xie
2008-07-07 11:31 ` Dmitry Adamushko
-- strict thread matches above, loose matches on Subject: below --
2008-07-09 22:32 Dmitry Adamushko
2008-07-10 7:30 ` Heiko Carstens
2008-07-10 7:39 ` Ingo Molnar
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