linux-kernel - Re: [Bug #12465] KVM guests stalling on 2.6.28 (bisected)

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Message-Id: <1237244137.4964.54.camel@kulgan.wumi.org.au>
Date:	Tue, 17 Mar 2009 09:25:37 +1030
From:	Kevin Shanahan <kmshanah@...b.org.au>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	Avi Kivity <avi@...hat.com>, "Rafael J. Wysocki" <rjw@...k.pl>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>, Mike Galbraith <efault@....de>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [Bug #12465] KVM guests stalling on 2.6.28 (bisected)

On Mon, 2009-03-16 at 21:07 +0100, Frederic Weisbecker wrote:
> I've looked a bit at your traces.
> I think it's probably too wide to find something inside.
> Latest -tip is provided with a new set of events tracing, meaning
> that you will be able to produce function graph traces with various
> sched events included.
> 
> Another thing, is it possible to reproduce it with only one ping?
> Or testing perioding pings and keep only one that raised a relevant
> threshold of latency? I think we could do a script that can do that.
> It would make the trace much clearer.

Yeah, I think that should be possible. If you can come up with such a
script, that would be great.

> Just wait a bit, I'm looking at which event could be relevant to enable
> and I come back to you with a set of commands to test.

Excellent! Thanks for looking into this.

Cheers,
Kevin.


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