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=-5.3 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 AB075C433DB for ; Mon, 22 Mar 2021 16:59:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 780066199F for ; Mon, 22 Mar 2021 16:59:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230422AbhCVQ6f (ORCPT ); Mon, 22 Mar 2021 12:58:35 -0400 Received: from mga11.intel.com ([192.55.52.93]:39144 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229728AbhCVQ6a (ORCPT ); Mon, 22 Mar 2021 12:58:30 -0400 IronPort-SDR: E6LzvFyaIU9QhFBAQNlBnlhp0jr+luLNL5UPfEqoyb9iNwPeKeDYms1IN/QgAxHI8kxP9b9sje BL6z0YtBrPZg== X-IronPort-AV: E=McAfee;i="6000,8403,9931"; a="186991456" X-IronPort-AV: E=Sophos;i="5.81,269,1610438400"; d="scan'208";a="186991456" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Mar 2021 09:58:28 -0700 IronPort-SDR: csMAkhWw4EdnJZ9PgSGX/hZmKqjDdhbJfNvfo6dXl9HkGJfJomXlruAKVg+r0+Bw6emB6BUlBn BjwSGkDpf3iw== X-IronPort-AV: E=Sophos;i="5.81,269,1610438400"; d="scan'208";a="451803351" Received: from oshchirs-mobl.ger.corp.intel.com (HELO [10.213.7.90]) ([10.213.7.90]) by orsmga001-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Mar 2021 09:58:27 -0700 Subject: Re: IMSM regresion References: <0a15c6a6-e8ba-be96-4323-bddcc2b993b8 () trained-monkey ! org> From: Oleksandr Shchirskyi To: Jes Sorensen , linux-raid@vger.kernel.org Message-ID: Date: Mon, 22 Mar 2021 17:58:25 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 MIME-Version: 1.0 In-Reply-To: <0a15c6a6-e8ba-be96-4323-bddcc2b993b8 () trained-monkey ! org> 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 Hello Jes, I have analyzed this issue, and information with this analysis is posted in a separate thread. The issue is caused by patch 4ae96c802203. We have no fix for it at the moment, and if you plan to mark a release candidate now, it would be good to revert that patch (as Nigel already mentioned). Thank you! On 3/16/2021 9:22 PM, Jes Sorensen wrote: > On 3/12/21 5:14 AM, Tkaczyk, Mariusz wrote: >> Hello Jes, >> >> We discovered IMSM regression after last push in following scenario: >> >> #mdadm -CR imsm0 -e imsm -n4 /dev/nvme[0125]n1 >> #mdadm -CR volume -l0 --chunk 64 --raid-devices=1 /dev/nvme0n1 --force >> #mdadm -G /dev/md/imsm0 -n2 >> >> At the end of reshape, level doesn't back to RAID0. >> >> This is an information. We are working on fix. Please don't mark release >> candidate yet. > > Thanks for the heads up! > > Jes > -- Regards, Oleksandr Shchirskyi