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=-6.5 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 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 76A52C433E0 for ; Mon, 21 Dec 2020 12:35:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2AE52216FD for ; Mon, 21 Dec 2020 12:35:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726290AbgLUMel (ORCPT ); Mon, 21 Dec 2020 07:34:41 -0500 Received: from mx3.molgen.mpg.de ([141.14.17.11]:40291 "EHLO mx1.molgen.mpg.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725807AbgLUMel (ORCPT ); Mon, 21 Dec 2020 07:34:41 -0500 Received: from [192.168.0.8] (ip5f5aef0c.dynamic.kabel-deutschland.de [95.90.239.12]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: buczek) by mx.molgen.mpg.de (Postfix) with ESMTPSA id 171622064784C; Mon, 21 Dec 2020 13:33:59 +0100 (CET) Subject: Re: md_raid: mdX_raid6 looping after sync_action "check" to "idle" transition From: Donald Buczek To: Guoqing Jiang , Song Liu , linux-raid@vger.kernel.org, Linux Kernel Mailing List , it+raid@molgen.mpg.de References: <95fbd558-5e46-7a6a-43ac-bcc5ae8581db@cloud.ionos.com> <77244d60-1c2d-330e-71e6-4907d4dd65fc@molgen.mpg.de> <7c5438c7-2324-cc50-db4d-512587cb0ec9@molgen.mpg.de> <37c158cb-f527-34f5-2482-cae138bc8b07@molgen.mpg.de> Message-ID: Date: Mon, 21 Dec 2020 13:33:58 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <37c158cb-f527-34f5-2482-cae138bc8b07@molgen.mpg.de> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-raid@vger.kernel.org Dear Guoging, I think now that this is not an issue for md. I've driven a system into that situation again and have clear indication, that this is a problem of the member block device driver. With md0 in the described errornous state (md0_raid6 busy looping, echo idle > .../sync_action blocked, no progress in mdstat) and md1 operating normally: root:deadbird:/scratch/local/# for f in /sys/devices/virtual/block/md?/md/rd*/block/inflight;do echo $f: $(cat $f);done /sys/devices/virtual/block/md0/md/rd0/block/inflight: 1 0 /sys/devices/virtual/block/md0/md/rd1/block/inflight: 1 0 /sys/devices/virtual/block/md0/md/rd10/block/inflight: 1 0 /sys/devices/virtual/block/md0/md/rd11/block/inflight: 1 0 /sys/devices/virtual/block/md0/md/rd12/block/inflight: 1 0 /sys/devices/virtual/block/md0/md/rd13/block/inflight: 1 0 /sys/devices/virtual/block/md0/md/rd14/block/inflight: 1 0 /sys/devices/virtual/block/md0/md/rd15/block/inflight: 1 0 /sys/devices/virtual/block/md0/md/rd2/block/inflight: 1 0 /sys/devices/virtual/block/md0/md/rd3/block/inflight: 1 0 /sys/devices/virtual/block/md0/md/rd4/block/inflight: 1 0 /sys/devices/virtual/block/md0/md/rd5/block/inflight: 1 0 /sys/devices/virtual/block/md0/md/rd6/block/inflight: 1 0 /sys/devices/virtual/block/md0/md/rd7/block/inflight: 1 0 /sys/devices/virtual/block/md0/md/rd8/block/inflight: 1 0 /sys/devices/virtual/block/md0/md/rd9/block/inflight: 1 0 /sys/devices/virtual/block/md1/md/rd0/block/inflight: 0 0 /sys/devices/virtual/block/md1/md/rd1/block/inflight: 0 0 /sys/devices/virtual/block/md1/md/rd10/block/inflight: 0 0 /sys/devices/virtual/block/md1/md/rd11/block/inflight: 0 0 /sys/devices/virtual/block/md1/md/rd12/block/inflight: 0 0 /sys/devices/virtual/block/md1/md/rd13/block/inflight: 0 0 /sys/devices/virtual/block/md1/md/rd14/block/inflight: 0 0 /sys/devices/virtual/block/md1/md/rd15/block/inflight: 0 0 /sys/devices/virtual/block/md1/md/rd2/block/inflight: 0 0 /sys/devices/virtual/block/md1/md/rd3/block/inflight: 0 0 /sys/devices/virtual/block/md1/md/rd4/block/inflight: 0 0 /sys/devices/virtual/block/md1/md/rd5/block/inflight: 0 0 /sys/devices/virtual/block/md1/md/rd6/block/inflight: 0 0 /sys/devices/virtual/block/md1/md/rd7/block/inflight: 0 0 /sys/devices/virtual/block/md1/md/rd8/block/inflight: 0 0 /sys/devices/virtual/block/md1/md/rd9/block/inflight: 0 0 Best Donald