From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756972AbbFPRTi (ORCPT ); Tue, 16 Jun 2015 13:19:38 -0400 Received: from mx0b-00082601.pphosted.com ([67.231.153.30]:35509 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754870AbbFPRTa (ORCPT ); Tue, 16 Jun 2015 13:19:30 -0400 Message-ID: <55805A98.9020609@fb.com> Date: Tue, 16 Jun 2015 13:19:20 -0400 From: Chris Mason User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0 MIME-Version: 1.0 To: , Dave Jones , , Linux Kernel Subject: Re: [4.1-rc7] btrfs related VM_BUG_ON in filemap.c References: <20150610134017.GA14803@codemonkey.org.uk> <55787743.4070308@fb.com> <20150616171443.GS6761@suse.cz> In-Reply-To: <20150616171443.GS6761@suse.cz> Content-Type: text/plain; charset="windows-1252" Content-Transfer-Encoding: 7bit X-Originating-IP: [192.168.52.123] X-Proofpoint-Spam-Reason: safe X-FB-Internal: Safe X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:5.14.151,1.0.33,0.0.0000 definitions=2015-06-16_06:2015-06-16,2015-06-16,1970-01-01 signatures=0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 06/16/2015 01:14 PM, David Sterba wrote: > On Wed, Jun 10, 2015 at 01:43:31PM -0400, Chris Mason wrote: >> On 06/10/2015 09:40 AM, Dave Jones wrote: >>> Found this on serial console this morning. The machine had rebooted itself shortly >>> afterwards (surprising, given I don't have panic-on-oops or similar set). >>> >> >> We had one other report of this a few months ago. Josef and I read >> through all of this and decided it was impossible, so someone else must >> be holding on to that page and unlocking it. >> >> (that someone else could easily be btrfs, just not in this code path) > > https://patchwork.kernel.org/patch/6478941/ looks like the fix, bug > symptoms match the "keywords", I haven't inspected it closely. > That one is in my integration-4.2 branch if you want to give it a shot. -chris