linux-kernel - Re: Kernel migration eat CPUs

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Date:	Thu, 10 Oct 2013 11:13:20 +0400
From:	Alexey Vlasov <renton@...ton.name>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	Mike Galbraith <bitbucket@...ine.de>,
	linux-kernel@...r.kernel.org
Subject: Re: Kernel migration eat CPUs

Hi Ingo,

On Wed, Sep 11, 2013 at 07:18:14PM +0400, Alexey Vlasov wrote:
> On Thu, Sep 05, 2013 at 01:12:52PM +0200, Ingo Molnar wrote:
> > 
> > Could you try the latest -tip tree at:
> > 
> >    git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git
> > 
> > In particular this fix:
> > 
> >    5a8e01f8fa51 sched/cputime: Do not scale when utime == 0
> > 
> > Could perhaps fix the phantom CPU overhead you are seeing?
> 
> This kernel solved problems.
> Thank you.

One problem is solved, but there appeared another one. Now this kernel
began to crash.

Crashdump is in attachment.

-- 
BRGDS. Alexey Vlasov.

View attachment "bug_kernel-git-tip.txt" of type "text/plain" (14161 bytes)