From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758885AbYBFT4E (ORCPT ); Wed, 6 Feb 2008 14:56:04 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754952AbYBFTzy (ORCPT ); Wed, 6 Feb 2008 14:55:54 -0500 Received: from extu-mxob-1.symantec.com ([216.10.194.28]:38251 "EHLO extu-mxob-1.symantec.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752304AbYBFTzx (ORCPT ); Wed, 6 Feb 2008 14:55:53 -0500 Date: Wed, 6 Feb 2008 19:55:36 +0000 (GMT) From: Hugh Dickins X-X-Sender: hugh@blonde.site To: John Heil cc: linux-kernel@vger.kernel.org Subject: Re: Bug: 2.6.24-smp: Eeek! page_mapcount(page) went negative! (-1) In-Reply-To: Message-ID: References: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 6 Feb 2008, kerndev@sc-software.com wrote: > > Before digging into this myself (don't really have enought time), > I thought I'd submit it here... Thanks for the report. > Feb 6 09:09:47 sc-software kernel: Eeek! page_mapcount(page) went negative! These very often turn out the be due to bad RAM or some such: worth running memtest86+ overnight when you can, though its success wouldn't be conclusive. > (-1) > Feb 6 09:09:47 sc-software kernel: page pfn = 12b1b1 > Feb 6 09:09:47 sc-software kernel: page->flags = 80080014 > Feb 6 09:09:47 sc-software kernel: page->count = 0 That's a free page which shouldn't have appeared in the pagetable. It could be that there's a bit error somewhere in that pfn of 12b1b1. > Feb 6 09:09:47 sc-software kernel: page->mapping = 00000000 > Feb 6 09:09:47 sc-software kernel: vma->vm_ops = 0x0 > Feb 6 09:09:47 sc-software kernel: ------------[ cut here ]------------ > Feb 6 09:09:47 sc-software kernel: kernel BUG at mm/rmap.c:631! > Feb 6 09:09:47 sc-software kernel: invalid opcode: 0000 [#2] PREEMPT SMP > Feb 6 09:09:47 sc-software kernel: Modules linked in: shpchp pci_hotplug > ohci1394 ieee1394 > Feb 6 09:09:47 sc-software kernel: > Feb 6 09:09:47 sc-software kernel: Pid: 3710, comm: X Tainted: G D But that [#2] and that D taint both say there was already a problem before this: anything showing in the log for that? Hugh