From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail137.messagelabs.com (mail137.messagelabs.com [216.82.249.19]) by kanga.kvack.org (Postfix) with SMTP id 577ED6B005C for ; Wed, 14 Jan 2009 16:05:47 -0500 (EST) Received: by qyk5 with SMTP id 5so775237qyk.14 for ; Wed, 14 Jan 2009 13:05:45 -0800 (PST) Message-ID: <3e8340490901141305x7155cf10ueed386646d6e21ee@mail.gmail.com> Date: Wed, 14 Jan 2009 16:05:45 -0500 From: "Bryan Donlan" Subject: Re: OOPS and panic on 2.6.29-rc1 on xen-x86 In-Reply-To: <20090114025910.GA17395@wotan.suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <20090112172613.GA8746@shion.is.fushizen.net> <3e8340490901122054q4af2b4cm3303c361477defc0@mail.gmail.com> <20090114025910.GA17395@wotan.suse.de> Sender: owner-linux-mm@kvack.org To: Nick Piggin Cc: linux-kernel@vger.kernel.org, xen-devel@lists.xensource.com, linux-mm@kvack.org List-ID: On Tue, Jan 13, 2009 at 9:59 PM, Nick Piggin wrote: > On Mon, Jan 12, 2009 at 11:54:32PM -0500, Bryan Donlan wrote: >> On Mon, Jan 12, 2009 at 12:26 PM, Bryan Donlan wrote: >> > [resending with log/config inline as my previous message seems to have >> > been eaten by vger's spam filters] >> > >> > Hi, >> > >> > After testing 2.6.29-rc1 on xen-x86 with a btrfs root filesystem, I >> > got the OOPS quoted below and a hard freeze shortly after boot. >> > Boot messages and config are attached. >> > >> > This is on a test system, so I'd be happy to test any patches. >> > >> > Thanks, >> > >> > Bryan Donlan >> >> 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 :) >> >> > >> > ------------[ cut here ]------------ >> > Kernel BUG at c05ef80d [verbose debug info unavailable] >> > invalid opcode: 0000 [#1] SMP >> > last sysfs file: /sys/block/xvdc/size >> > Modules linked in: > > It is bugging in schedule somehow, but you don't have verbose debug > info compiled in. Can you compile that in and reproduce if you have > the time? Sure - which config option would that be? CONFIG_DEBUG_BUGVERBOSE? > Going bug here might indicate that there is some other problem with > the Xen and/or vmalloc code, regardless of reverting this patch. > > Thanks, > Nick > -- 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