From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail144.messagelabs.com (mail144.messagelabs.com [216.82.254.51]) by kanga.kvack.org (Postfix) with ESMTP id 242496B0062 for ; Tue, 13 Jan 2009 04:27:35 -0500 (EST) Subject: Re: [Xen-devel] Re: OOPS and panic on 2.6.29-rc1 on xen-x86 From: Christophe Saout In-Reply-To: <3e8340490901122054q4af2b4cm3303c361477defc0@mail.gmail.com> References: <20090112172613.GA8746@shion.is.fushizen.net> <3e8340490901122054q4af2b4cm3303c361477defc0@mail.gmail.com> Content-Type: text/plain Date: Tue, 13 Jan 2009 10:25:31 +0100 Message-Id: <1231838731.4823.2.camel@leto.intern.saout.de> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: Bryan Donlan Cc: linux-kernel@vger.kernel.org, Nick Piggin , linux-mm@kvack.org, xen-devel@lists.xensource.com List-ID: 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). Thanks, Christophe -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org