Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761563AbZCZUXX (ORCPT ); Thu, 26 Mar 2009 16:23:23 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757452AbZCZUXO (ORCPT ); Thu, 26 Mar 2009 16:23:14 -0400 Received: from bowden.ucwb.org.au ([203.122.237.119]:48286 "EHLO mail.ucwb.org.au" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753795AbZCZUXN (ORCPT ); Thu, 26 Mar 2009 16:23:13 -0400 Subject: Re: [Bug #12465] KVM guests stalling on 2.6.28 (bisected) From: Kevin Shanahan To: Frederic Weisbecker Cc: Avi Kivity , "Rafael J. Wysocki" , Linux Kernel Mailing List , Kernel Testers List , Ingo Molnar , Mike Galbraith , Peter Zijlstra In-Reply-To: <20090324114409.GB6058@nowhere> References: <1237107837.27699.27.camel@kulgan.wumi.org.au> <49BE20B2.9070804@redhat.com> <1237207595.4964.31.camel@kulgan.wumi.org.au> <20090316200736.GD8393@nowhere> <1237244137.4964.54.camel@kulgan.wumi.org.au> <20090318001955.GB5143@nowhere> <1237338986.4801.11.camel@kulgan.wumi.org.au> <1237411441.5211.5.camel@kulgan.wumi.org.au> <1237611639.4933.4.camel@kulgan.wumi.org.au> <20090324114409.GB6058@nowhere> Content-Type: text/plain Organization: UnitingCare Wesley Bowden Date: Fri, 27 Mar 2009 06:52:57 +1030 Message-Id: <1238098977.5406.5.camel@kulgan> Mime-Version: 1.0 X-Mailer: Evolution 2.24.5 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1201 Lines: 37 On Tue, 2009-03-24 at 12:44 +0100, Frederic Weisbecker wrote: > As I explained in my previous mail, you trace is only > a snapshot that happened in 10 msec. > > I experimented different sizes for the ring buffer but even > a 1 second trace require 20 Mo of memory. And a so huge trace > would be impractical. > > I think we should keep the trace filters we had previously. > If you don't minde, could you please retest against latest -tip > the following updated patch? Iadded the filters, fixed the python > subshell and also flushed the buffer more nicely according to > a recent feature in -tip: > > echo > trace > > instead of switching to nop. > You will need to pull latest -tip again. Ok, new set of traces uploaded again here: http://disenchant.net/tmp/bug-12465/trace-4/ These were taken using 2.6.29-tip-02749-g398bf09. Same as last time, it was only necessary to have the one guest running to reproduce the problem. Cheers, Kevin. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/