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=-3.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY autolearn=no 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 10794C388F9 for ; Wed, 11 Nov 2020 04:01:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8AE0920797 for ; Wed, 11 Nov 2020 04:01:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="ij9hEpps" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725884AbgKKEBJ (ORCPT ); Tue, 10 Nov 2020 23:01:09 -0500 Received: from userp2120.oracle.com ([156.151.31.85]:44932 "EHLO userp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725849AbgKKEBI (ORCPT ); Tue, 10 Nov 2020 23:01:08 -0500 Received: from pps.filterd (userp2120.oracle.com [127.0.0.1]) by userp2120.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 0AB3tH0i162285; Wed, 11 Nov 2020 04:00:56 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=to : cc : subject : from : message-id : references : date : in-reply-to : mime-version : content-type; s=corp-2020-01-29; bh=FK9shu8RUlGxCAwUEewnYhWWXOc2jguPBEl+vnkRGSA=; b=ij9hEppsPctIsqiDCTmL/h2Ds0lw/xpybQR+CIenMnx+YpI0TR6z+TAb1PIVP2M5n0RL 2I3O1i4GUslbtgRusNLFHMCoUvm8beKBv4URQVkacmy5DpFSL0ufwMc/ZeG3S5MQDjA4 fzoBV5jY86O5tHS5lIXgaH8u0nZcvFANI3bzJgkMtwrI29Px8aRewuS7GJStgIKLr+r/ HZLU2byB6IHaMGmTluXalgDqW7DQe0psJjb06zVuAQvGP0xrEbYVqrF+aSAKpD+cLR23 Bzv7JN/cXmoH/XkDJkTAnMuRS/iH30BDG9aiogZ6qtfvfYPSJPJVBZ9iXRN2ipVvh7PB GQ== Received: from userp3020.oracle.com (userp3020.oracle.com [156.151.31.79]) by userp2120.oracle.com with ESMTP id 34p72en7yk-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 11 Nov 2020 04:00:56 +0000 Received: from pps.filterd (userp3020.oracle.com [127.0.0.1]) by userp3020.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 0AB3t5p7134879; Wed, 11 Nov 2020 03:58:56 GMT Received: from aserv0122.oracle.com (aserv0122.oracle.com [141.146.126.236]) by userp3020.oracle.com with ESMTP id 34qgp7r1eb-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 11 Nov 2020 03:58:56 +0000 Received: from abhmp0002.oracle.com (abhmp0002.oracle.com [141.146.116.8]) by aserv0122.oracle.com (8.14.4/8.14.4) with ESMTP id 0AB3wsCB023323; Wed, 11 Nov 2020 03:58:54 GMT Received: from ca-mkp.ca.oracle.com (/10.159.214.123) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Tue, 10 Nov 2020 19:58:54 -0800 To: "Ewan D. Milne" Cc: Hannes Reinecke , "Martin K. Petersen" , Christoph Hellwig , James Bottomley , linux-scsi@vger.kernel.org Subject: Re: [PATCH 0/4] scsi: remove devices in ALUA transitioning status From: "Martin K. Petersen" Organization: Oracle Corporation Message-ID: References: <20200930080256.90964-1-hare@suse.de> <71160d6ae57867312c60ac5a14ef6df2ece21d84.camel@redhat.com> Date: Tue, 10 Nov 2020 22:58:52 -0500 In-Reply-To: <71160d6ae57867312c60ac5a14ef6df2ece21d84.camel@redhat.com> (Ewan D. Milne's message of "Fri, 06 Nov 2020 19:02:56 -0500") MIME-Version: 1.0 Content-Type: text/plain X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9801 signatures=668682 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 mlxlogscore=999 adultscore=0 mlxscore=0 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2011110017 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9801 signatures=668682 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 bulkscore=0 mlxlogscore=999 mlxscore=0 malwarescore=0 suspectscore=1 lowpriorityscore=0 adultscore=0 phishscore=0 priorityscore=1501 spamscore=0 impostorscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2011110017 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Ewan, Hannes, >> during testing we found that there is an issue with dev_loss_tmo and >> devices in ALUA transitioning state. What happens is that I/O gets >> requeued via BLK_STS_RESOURCE for these devices, so when dev_loss_tmo >> triggers the SCSI core cannot flush the request list as I/O is simply >> requeued. Applied to 5.11/scsi-staging, thanks! -- Martin K. Petersen Oracle Linux Engineering