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=-7.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE 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 97FFBC433E2 for ; Thu, 17 Sep 2020 07:04:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4982F21974 for ; Thu, 17 Sep 2020 07:04:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600326270; bh=0+hT+GYcvJSeqK98OPsXXzedHRgK8e06mreG6di3eT4=; h=References:In-Reply-To:From:Date:Subject:To:Cc:List-ID:From; b=NF7lwoVbtNOOE8dujUWZY3MISpkQJcBX1VRX0lDIKnpIqDGeuxa0x61bk5P91E+rO S96dWXGSt+6+MiBuqKXKPpfrA1vaO0K988vjhkUnaygD0PoSsSaUcirCu1uYJkJLtZ YYGHUYaxTLCrFOsPc62f4xcJIWDVncAKw9QR1NDQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726109AbgIQHEI (ORCPT ); Thu, 17 Sep 2020 03:04:08 -0400 Received: from mail.kernel.org ([198.145.29.99]:54816 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726245AbgIQHDl (ORCPT ); Thu, 17 Sep 2020 03:03:41 -0400 Received: from mail-lj1-f180.google.com (mail-lj1-f180.google.com [209.85.208.180]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id A7F5C21D43 for ; Thu, 17 Sep 2020 07:03:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600326216; bh=0+hT+GYcvJSeqK98OPsXXzedHRgK8e06mreG6di3eT4=; h=References:In-Reply-To:From:Date:Subject:To:Cc:From; b=Sbe/8QIPrR57cyqQOeSjZeMk5oFHWArb+osMh2JRiqxHbWA7XTe0UQ3cXqfuzeh5Q gv0yurt4BXy/fz5HxX+vAUOV2uBcULX/uwKbn02FTMZd4+GRChpBq978G46BDRP/1Z 9fsqlEzaBEEXjlJeHf2w3nubpNfGpgqyQc9VnZLI= Received: by mail-lj1-f180.google.com with SMTP id v23so1089102ljd.1 for ; Thu, 17 Sep 2020 00:03:35 -0700 (PDT) X-Gm-Message-State: AOAM530Ua+aOEjVi9CHh9INK96kDuFekovDKJb6tuoFbhykhGxLgpG9Y QiA3YWsH2O1nBMveTWHptiMIUynn/0cSk9Ll+FA= X-Google-Smtp-Source: ABdhPJxyZ0cEyWIU4Sf+VFDSQnXN92gtRxQ6S20DiUznhvR57MgwTy6GSdtp3N3z9t3LYGvvBsD30PnlNc66/VeLJII= X-Received: by 2002:a2e:7602:: with SMTP id r2mr9888799ljc.10.1600326213891; Thu, 17 Sep 2020 00:03:33 -0700 (PDT) MIME-Version: 1.0 References: <6F1A48DB-CA95-433B-91F3-D0051453A8E1@amazon.com> In-Reply-To: <6F1A48DB-CA95-433B-91F3-D0051453A8E1@amazon.com> From: Song Liu Date: Thu, 17 Sep 2020 00:03:22 -0700 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: RAID5 issue with UBUNTU 20.04.1 on my desktop To: "Sung, KoWei" Cc: "linux-raid@vger.kernel.org" , "Bshara, Saeed" , "Duan, HanShen" , "Tokoyo, Hiroshi" , "Fortin, Mike" Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-raid@vger.kernel.org Hi Winder, On Wed, Sep 16, 2020 at 2:53 AM Sung, KoWei wrote: > > Hi, > > I found RAID5 stability issue while doing disk expansion. > I attached 4 disks (/dev/sda, /dev/sdb, /dev/sdc and /dev/sdd) and create= partition by =E2=80=9Ccreate_partition.sh=E2=80=9D scripts on my PC and ru= n my test scripts =E2=80=9Craid_reshape_12.sh=E2=80=9D (as attached). > Basically, the test will add partitions to RAID5 (/dev/md3) and write fil= es to /dev/md3 (ext4) at the same time. > Within 1 or 2 hours, kernel will get crashed (Oops) and reshape/resync ca= nnot be finished forever (log as attached). > > The issue happens randomly, but it most likely happens at beginning of re= shape process. When kernel crash happens, the reshape stops at about 3-10% = complete only. > Moreover, it is not related to any partition size, because I=E2=80=99ve t= ried different size, but issue still exists. > I've also tried different kernel (4.1/4.2/4.9/4.19/5.4/5.8), and all kern= el version can see this issue. Thanks for the report. I just started some tests with the script. I will update whether it repros the issue. Song