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

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Message-ID: <20090120183930.GA5048@elte.hu>
Date:	Tue, 20 Jan 2009 19:39:30 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Kevin Shanahan <kmshanah@...b.org.au>, 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>,
	Kevin Shanahan <kmshanah@...xo.wumi.org.au>,
	Mike Galbraith <efault@....de>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Frédéric Weisbecker <fweisbec@...il.com>
Subject: Re: [Bug #12465] KVM guests stalling on 2.6.28 (bisected)


* Steven Rostedt <rostedt@...dmis.org> wrote:

> > hm, that's a significant regression then. The latency tracer used to 
> > measure the highest-prio task in the system - be that RT or non-rt.
> 
> Well, it is a regression from what was in -rt yes. But not from what 
> ever was in mainline.

indeed, it is not a regression, it is worse: it makes the mainline version 
utterly useless in 99% of the cases ... This really needs to be fixed.

	Ingo
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