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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 94E56CD37B5 for ; Sat, 16 Sep 2023 06:07:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238720AbjIPGGo (ORCPT ); Sat, 16 Sep 2023 02:06:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52338 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238699AbjIPGGi (ORCPT ); Sat, 16 Sep 2023 02:06:38 -0400 X-Greylist: delayed 404 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Fri, 15 Sep 2023 23:06:32 PDT Received: from out-212.mta1.migadu.com (out-212.mta1.migadu.com [95.215.58.212]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6C5C81BD3 for ; Fri, 15 Sep 2023 23:06:32 -0700 (PDT) Content-Type: multipart/mixed; boundary="------------Tcat99XAgrdPKOmqb0TEbcuG" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1694843983; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=ve6JYvPI4VdunNc4Sl5WLvNhkmYlQjHC/vvIXOboACo=; b=FL0Mq6AyC9Tjzgg4lphMlo6xt5OiS/MC/929J3z6CtYpqfQa590cqdr+B89qxBbvJfH0SV WHzY4+txDJQwHJwvSwbdVCiveI/OtMxvh5BW0UXj624hCxk57LloklH6NfKNrKok5vfBH0 UqHrS6GikxZVb8AzUCI45mLDlQzHi6w= Message-ID: Date: Sat, 16 Sep 2023 13:59:36 +0800 MIME-Version: 1.0 Subject: Re: [bug report] blktests srp/002 hang X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Zhu Yanjun To: Bob Pearson , Bart Van Assche , Shinichiro Kawasaki Cc: "linux-rdma@vger.kernel.org" , "linux-scsi@vger.kernel.org" References: <0c5c732c-283c-b29a-0ac2-c32211fc7e17@gmail.com> <8be8f611-e413-9584-7c2e-2c1abf4147be@acm.org> <18a3ae8c-145b-4c7f-a8f5-67840feeb98c@acm.org> <9dd0aa0a-d696-a95b-095b-f54d6d31a6ab@linux.dev> In-Reply-To: <9dd0aa0a-d696-a95b-095b-f54d6d31a6ab@linux.dev> X-Migadu-Flow: FLOW_OUT Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org This is a multi-part message in MIME format. --------------Tcat99XAgrdPKOmqb0TEbcuG Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit 在 2023/9/14 7:38, Zhu Yanjun 写道: > 在 2023/9/14 1:36, Bob Pearson 写道: >> On 8/25/23 08:52, Bart Van Assche wrote: >>> On 8/24/23 18:11, Shinichiro Kawasaki wrote: >>>> If it takes time to resolve the issues, it sounds a good idea to >>>> make siw driver >>>> default, since it will make the hangs less painful for blktests >>>> users. Another >>>> idea to reduce the pain is to improve srp/002 and srp/011 to detect >>>> the hangs >>>> and report them as failures. >>> >>> At this moment we don't know whether the hangs can be converted into >>> failures. >>> Answering this question is only possible after we have found the root >>> cause of >>> the hang. If the hang would be caused by commands getting stuck in >>> multipathd >>> then it can be solved by changing the path configuration (see also >>> the dmsetup >>> message commands in blktests). If the hang is caused by a kernel bug >>> then it's >>> very well possible that there is no way to recover other than by >>> rebooting the >>> system on which the tests are run. >>> >>> Thanks, >>> >>> Bart. >> >> Since 6.6.0-rc1 came out I decided to give blktests srp another try >> with the current >> rdma for-next branch on my Ubuntu (debian) system. For the first time >> in a very long >> time all the srp test cases run correctly multiple times. I ran each >> one 3X. >> >> I had tried to build multipath-tools from source but ran into problems >> so I reinstalled >> the current Ubuntu packages. I have no idea what was the root cause >> that finally went >> away but I don't think it was in rxe as there aren't any recent >> patches related to the >> blktests failures. I did notice that the dmesg traces picked up a >> couple of lines after >> the place where it used to hang. Something about setting an ALUA >> timeout to 60 seconds. >> >> Thanks to all who worked on this. > > Hi, Bob > > About this problem, IIRC, this problem easily occurred on Debian and > Fedora 38 and with the commit 9b4b7c1f9f54 ("RDMA/rxe: Add workqueue > support for rxe tasks"). > > And on Debian, with the latest multipathd, this problem seems to disappear. > > On Fedora 38, even with the latest multipathd, this problem still can be > observed. On Debian, with the latest multipathd or revert the commit 9b4b7c1f9f54 ("RDMA/rxe: Add workqueue support for rxe tasks"), this problem will disappear. On Fedora 38, if the commit 9b4b7c1f9f54 ("RDMA/rxe: Add workqueue support for rxe tasks") is reverted, will this problem still appear? I do not have such test environment. The commit is in the attachment, can anyone have a test? Please let us know the test result. Thanks. Zhu Yanjun > > On Ubuntu, it is difficult to reproduce this problem. > > Perhaps this is why you can not reproduce this problem on Ubuntu. > > It seems that this problem is related with linux distribution and the > version of multipathd. > > If I am missing something, please feel free to let me know. > > Zhu Yanjun > >> >> Bob Pearson > --------------Tcat99XAgrdPKOmqb0TEbcuG Content-Type: text/plain; charset=UTF-8; name="0001-Revert-RDMA-rxe-Add-workqueue-support-for-rxe-tasks.patch" Content-Disposition: attachment; filename*0="0001-Revert-RDMA-rxe-Add-workqueue-support-for-rxe-tasks.pat"; filename*1="ch" Content-Transfer-Encoding: base64 RnJvbSBmZDIzNjBlZGJjOTE3MTI5OGQyZTkxZmQ5Yjc0YjRjMzAyMmRiOWQ0IE1vbiBTZXAg MTcgMDA6MDA6MDAgMjAwMQpGcm9tOiBaaHUgWWFuanVuIDx5YW5qdW4uemh1QGxpbnV4LmRl dj4KRGF0ZTogRnJpLCAxNSBTZXAgMjAyMyAyMzowNzoxNyAtMDQwMApTdWJqZWN0OiBbUEFU Q0ggMS8xXSBSZXZlcnQgIlJETUEvcnhlOiBBZGQgd29ya3F1ZXVlIHN1cHBvcnQgZm9yIHJ4 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