From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3553EC10F0E for ; Tue, 9 Apr 2019 11:28:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 05A132084C for ; Tue, 9 Apr 2019 11:28:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="oty1tY91" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727219AbfDIL2D (ORCPT ); Tue, 9 Apr 2019 07:28:03 -0400 Received: from aserp2130.oracle.com ([141.146.126.79]:34010 "EHLO aserp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726388AbfDIL1s (ORCPT ); Tue, 9 Apr 2019 07:27:48 -0400 Received: from pps.filterd (aserp2130.oracle.com [127.0.0.1]) by aserp2130.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x39BIrr7142644; Tue, 9 Apr 2019 11:27:37 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=subject : to : references : cc : from : message-id : date : mime-version : in-reply-to : content-type : content-transfer-encoding; s=corp-2018-07-02; bh=pWumepPcTxhskpyg9O7WSTJj/P75JPumuGN+584Dbmo=; b=oty1tY91/H+AyPcA+OFlR01ADnIAdD5RYuOX4fTotexzQ93/47Rsz30pU1pmhbZPTkPL 99IsQCtoPjGsTMQ/4C/nG9pka9BkKSHM95E02AaLs4JEZmV4Jj5kXbUf5ntOOTZqO+hp rbEHRfdzeFo+/UNM/5MCKpdlwKkKaDLHbt+/AqTXBU0nHM6/tw3ARB4gGFssjgglKspg H8P/UpTQD2qsiKSquszDdezW+7MRPaTx65K5vKBgndbuXwtm4j9jqnFrAbxeeul4qpBO i38t+b6zEesEgOvP7Rw8cvH0Br4WzEZ1mqlCtUlUpAzOGFBWlXlMlL/WcoMmt/aGLJN1 4Q== Received: from aserp3020.oracle.com (aserp3020.oracle.com [141.146.126.70]) by aserp2130.oracle.com with ESMTP id 2rphmecfts-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 09 Apr 2019 11:27:37 +0000 Received: from pps.filterd (aserp3020.oracle.com [127.0.0.1]) by aserp3020.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x39BRbC2182693; Tue, 9 Apr 2019 11:27:37 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by aserp3020.oracle.com with ESMTP id 2rpytbj5ub-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 09 Apr 2019 11:27:37 +0000 Received: from abhmp0009.oracle.com (abhmp0009.oracle.com [141.146.116.15]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id x39BRRdQ010373; Tue, 9 Apr 2019 11:27:27 GMT Received: from [10.191.22.92] (/10.191.22.92) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Tue, 09 Apr 2019 04:27:27 -0700 Subject: Re: [RESEND PATCH] blk-mq: fix hang caused by freeze/unfreeze sequence To: Bob Liu References: <20190409090828.16282-1-bob.liu@oracle.com> Cc: linux-block@vger.kernel.org, shirley.ma@oracle.com, martin.petersen@oracle.com, Roman Pen , Akinobu Mita , Tejun Heo , Jens Axboe , Christoph Hellwig , linux-kernel@vger.kernel.org From: Dongli Zhang Message-ID: <051bab97-5294-d832-0a03-0600fdd96d6a@oracle.com> Date: Tue, 9 Apr 2019 19:27:18 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.3.0 MIME-Version: 1.0 In-Reply-To: <20190409090828.16282-1-bob.liu@oracle.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=9221 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1904090074 X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=9221 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1011 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1904090074 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 04/09/2019 05:08 PM, Bob Liu wrote: > This patch was proposed by Roman Pen[3] years ago. > Recently we hit a bug which is likely caused by the same reason,so rebased his > fix to v5.1 and resend. > Below is almost copied from that patch[3]. > Hi Bod, I think the commit message is not applicable to the most recent linux. Perhaps re-write the message based on the most recent version? Thank you very much! Dongli Zhang