From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S966902AbcCPOlc (ORCPT ); Wed, 16 Mar 2016 10:41:32 -0400 Received: from mx0a-00082601.pphosted.com ([67.231.145.42]:45648 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S966870AbcCPOl3 (ORCPT ); Wed, 16 Mar 2016 10:41:29 -0400 Subject: Re: [PATCH] mmc: card: don't use PF_MEMALLOC To: Martin Kepplinger , , , References: <1458128635-3539-1-git-send-email-martink@posteo.de> CC: , From: Jens Axboe Message-ID: <56E9707D.5070004@fb.com> Date: Wed, 16 Mar 2016 07:41:01 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0 MIME-Version: 1.0 In-Reply-To: <1458128635-3539-1-git-send-email-martink@posteo.de> Content-Type: text/plain; charset="windows-1252"; format=flowed Content-Transfer-Encoding: 7bit X-Originating-IP: [192.168.54.13] X-Proofpoint-Spam-Reason: safe X-FB-Internal: Safe X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2016-03-16_04:,, signatures=0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 03/16/2016 04:43 AM, Martin Kepplinger wrote: > PF_MEMALLOC is assigned to processes by mm. If drivers prevent memory > reclaim and mm is not in control, strange hang-up or OOM Killer invocation > could happen. > > Signed-off-by: Martin Kepplinger > --- > I use MMC cards with this change perfectly fine. As I understand it, > even *if* PF_MEMALLOC has a real reason to be here, I think it should > be very well documented. Did you try swap on mmcblk? -- Jens Axboe