From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933488AbbFJRnu (ORCPT ); Wed, 10 Jun 2015 13:43:50 -0400 Received: from mx0a-00082601.pphosted.com ([67.231.145.42]:33478 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753073AbbFJRnm (ORCPT ); Wed, 10 Jun 2015 13:43:42 -0400 Message-ID: <55787743.4070308@fb.com> Date: Wed, 10 Jun 2015 13:43:31 -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> In-Reply-To: <20150610134017.GA14803@codemonkey.org.uk> 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=2015-06-10_13:2015-06-10,2015-06-10,1970-01-01 signatures=0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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) so...what horrible things have you been up to? -chris