From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ingo Molnar <mingo-X9Un+BFzKDI@public.gmane.org>
Subject: Re: [Bug #12465] KVM guests stalling on 2.6.28 (bisected)
Date: Tue, 20 Jan 2009 19:39:30 +0100
Message-ID: <20090120183930.GA5048@elte.hu>
References: <KTnguC9mFUC.A.VNB.TJRdJB@chimera> <cX2gZ6Cy9nC.A.4dB.bJRdJB@chimera> <1232410363.4768.21.camel@kulgan.wumi.org.au> <20090120113546.GA26571@elte.hu> <1232455343.4895.4.camel@kulgan.wumi.org.au> <20090120125652.GA1457@elte.hu> <20090120130714.GA11048@elte.hu> <alpine.DEB.1.10.0901200957220.2681@gandalf.stny.rr.com> <20090120150408.GD21931@elte.hu> <alpine.DEB.1.10.0901201251180.2681@gandalf.stny.rr.com>
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To: Steven Rostedt <rostedt-nx8X9YLhiw1AfugRpC6u6w@public.gmane.org>
Cc: Kevin Shanahan <kmshanah-biM/RbsGxha6c6uEtOJ/EA@public.gmane.org>, Avi Kivity <avi-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>, "Rafael J. Wysocki" <rjw-KKrjLPT3xs0@public.gmane.org>, Linux Kernel Mailing List <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, Kernel Testers List <kernel-testers-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, Kevin Shanahan <kmshanah-IiIpDuVlHfMLO379cgqW9odd74u8MsAO@public.gmane.org>, Mike Galbraith <efault-Mmb7MZpHnFY@public.gmane.org>, Peter Zijlstra <a.p.zijlstra-/NLkJaSkS4VmR6Xm/wNWPw@public.gmane.org>, =?iso-8859-1?Q?Fr=E9d=E9ric?= Weisbecker <fweisbec-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>


* Steven Rostedt <rostedt-nx8X9YLhiw1AfugRpC6u6w@public.gmane.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