Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755745AbZAMLvB (ORCPT ); Tue, 13 Jan 2009 06:51:01 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752785AbZAMLuw (ORCPT ); Tue, 13 Jan 2009 06:50:52 -0500 Received: from mx3.mail.elte.hu ([157.181.1.138]:56988 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752647AbZAMLuv (ORCPT ); Tue, 13 Jan 2009 06:50:51 -0500 Date: Tue, 13 Jan 2009 12:50:29 +0100 From: Ingo Molnar To: Christophe Saout , Andrew Morton Cc: Bryan Donlan , linux-kernel@vger.kernel.org, Nick Piggin , linux-mm@kvack.org, xen-devel@lists.xensource.com Subject: Re: [Xen-devel] Re: OOPS and panic on 2.6.29-rc1 on xen-x86 Message-ID: <20090113115029.GA12055@elte.hu> References: <20090112172613.GA8746@shion.is.fushizen.net> <3e8340490901122054q4af2b4cm3303c361477defc0@mail.gmail.com> <1231838731.4823.2.camel@leto.intern.saout.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1231838731.4823.2.camel@leto.intern.saout.de> User-Agent: Mutt/1.5.18 (2008-05-17) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1553 Lines: 40 * Christophe Saout wrote: > Hi Bryan, > > > I've bisected the bug in question, and the faulty commit appears to be: > > commit e97a630eb0f5b8b380fd67504de6cedebb489003 > > Author: Nick Piggin > > Date: Tue Jan 6 14:39:19 2009 -0800 > > > > mm: vmalloc use mutex for purge > > > > The vmalloc purge lock can be a mutex so we can sleep while a purge is > > going on (purge involves a global kernel TLB invalidate, so it can take > > quite a while). > > > > Signed-off-by: Nick Piggin > > Signed-off-by: Andrew Morton > > Signed-off-by: Linus Torvalds > > > > The bug is easily reproducable by a kernel build on -j4 - it will > > generally OOPS and panic before the build completes. > > Also, I've tested it with ext3, and it still occurs, so it seems > > unrelated to btrfs at least :) > > Nice! > > Reverting this also fixes the BUG() I was seeing when testing the Dom0 > patches on 2.6.29-rc1+tip. It just ran stable for an hour compiling > gimp and playing music on my notebook (and then I had to leave). okay - i've reverted it in tip/master so that testing can continue - but the upstream fix (or revert) should be done via the MM folks. Ingo -- 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/