Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758789AbZAOQgp (ORCPT ); Thu, 15 Jan 2009 11:36:45 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753292AbZAOQgg (ORCPT ); Thu, 15 Jan 2009 11:36:36 -0500 Received: from websrv.werbeagentur-aufwind.de ([88.198.253.206]:35391 "EHLO websrv.werbeagentur-aufwind.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753167AbZAOQgf (ORCPT ); Thu, 15 Jan 2009 11:36:35 -0500 Subject: Re: OOPS and panic on 2.6.29-rc1 on xen-x86 From: Christophe Saout To: Bryan Donlan Cc: Nick Piggin , linux-kernel@vger.kernel.org, xen-devel@lists.xensource.com, linux-mm@kvack.org In-Reply-To: <3e8340490901141619g3c32ebads482d1176efbd98a3@mail.gmail.com> References: <20090112172613.GA8746@shion.is.fushizen.net> <3e8340490901122054q4af2b4cm3303c361477defc0@mail.gmail.com> <20090114025910.GA17395@wotan.suse.de> <3e8340490901141619g3c32ebads482d1176efbd98a3@mail.gmail.com> Content-Type: text/plain Date: Thu, 15 Jan 2009 17:36:32 +0100 Message-Id: <1232037392.4604.4.camel@leto.intern.saout.de> Mime-Version: 1.0 X-Mailer: Evolution 2.24.2 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1790 Lines: 50 Am Mittwoch, den 14.01.2009, 19:19 -0500 schrieb Bryan Donlan: > 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: > >> > >> 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 :) > >> > > Here's one from a config with CONFIG_DEBUG_BUGVERBOSE: > > ------------[ cut here ]------------ > kernel BUG at /root/linux-2.6/arch/x86/include/asm/mmu_context_32.h:39! For the record, I was getting the same bug on x86_64: (in mmu_context_64.h): ... #ifdef CONFIG_SMP else { write_pda(mmu_state, TLBSTATE_OK); if (read_pda(active_mm) != next) BUG(); ... Christophe -- 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/