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,DKIM_SIGNED, DKIM_VALID,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 09B30C433FE for ; Tue, 8 Dec 2020 14:17:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C736023A33 for ; Tue, 8 Dec 2020 14:17:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729252AbgLHORK (ORCPT ); Tue, 8 Dec 2020 09:17:10 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35566 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729757AbgLHORK (ORCPT ); Tue, 8 Dec 2020 09:17:10 -0500 Received: from mail-io1-xd2b.google.com (mail-io1-xd2b.google.com [IPv6:2607:f8b0:4864:20::d2b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2274DC0617A6 for ; Tue, 8 Dec 2020 06:15:44 -0800 (PST) Received: by mail-io1-xd2b.google.com with SMTP id n14so16990722iom.10 for ; Tue, 08 Dec 2020 06:15:44 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20150623.gappssmtp.com; s=20150623; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=aFEq0S7a57DGwr5Vv73yvEZmzOjbCOIiqXWdjglEIDM=; b=hguXzE2N/SqwhTAkfIFMN5D2kcOoRovIkcFN8Sm8Y8WbZ9PYL6fpRqVJSwl9isgOj9 80nVcKEdADHigrpy+4eIXwjRtMT2knvOgcGVjHDGFRM4aOhVMhSFQIhMQHdGpzVCDpW8 ZKLvxs7+FpyAvSGtYG79QjrKTuK4TWoKDcAtsdWVzaBCKY567YVj9jJAeiBF4Dlfsfwq llXkyBcDEpJFj3Z0FiZ9tyRxmJA+Dbt+yK8p/N2Q26kcXwFnNU42nX41I3NMUctrMGbG 9RhsvwW12O210fb96Njx1T+wXTZbLcj/jMV2OXNP42ByLMQr/PArBXLsl9IYO/HjChH5 jVDw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=aFEq0S7a57DGwr5Vv73yvEZmzOjbCOIiqXWdjglEIDM=; b=qLXawMbXAtST0hV1f579w96/IQBYwDdf5YcgH/zxYLNdaGni3kCa2+Yw4bL3lOJRHZ lRiO9CetNbnVabsxfmrt9gPAxqTL/fY6phDuGEUsgln1BB9v1VK4l0Ng4ijbvUdnHJDy esiCX2LdhgbXcq799hp8DjxjXl7qYvyyhyzOEFdoo0AOzl+mQezrkTJyqICGs6zxuxyO Bf2kDwOdZUvHIZWwqOxBIxMgQ+C+YTb+n2dZY4ltuV8NjVyW5q1gLk/C/7t52woiokBg xZwij7yRvXJI58BX74PqF03xm4EQteG0Xw1kW0XZJmUE3qy4tc0qqYAgY8fxW1wYu+gd gDiQ== X-Gm-Message-State: AOAM530EYKz3dmGbJRwLTXg9hY7VaiBNtHCSIUWVKGE8ssLsj9lDrrAm eG9iSuwHWFAvbehvAtnLVXW76bRc8bnOqw== X-Google-Smtp-Source: ABdhPJzD7k++Tng4C23t2AsnQOqZkMhInrVVHvjmUGn3gedrlrpTsFJu1dm1X/5LMt9jMiPy6Cba9Q== X-Received: by 2002:a02:b02:: with SMTP id 2mr16161804jad.15.1607436943117; Tue, 08 Dec 2020 06:15:43 -0800 (PST) Received: from [192.168.1.30] ([65.144.74.34]) by smtp.gmail.com with ESMTPSA id h70sm7716957iof.31.2020.12.08.06.15.42 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 08 Dec 2020 06:15:42 -0800 (PST) Subject: Re: store a pointer to the block_device in struct bio (again) To: Christoph Hellwig , Qian Cai Cc: Tejun Heo , Coly Li , Song Liu , dm-devel@redhat.com, linux-bcache@vger.kernel.org, linux-raid@vger.kernel.org, linux-s390@vger.kernel.org, linux-block@vger.kernel.org, Stephen Rothwell , Linux Next Mailing List References: <20201201165424.2030647-1-hch@lst.de> <920899710c9e8dcce16e561c6d832e4e9c03cd73.camel@redhat.com> <20201208110403.GA22179@lst.de> From: Jens Axboe Message-ID: Date: Tue, 8 Dec 2020 07:15:43 -0700 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: <20201208110403.GA22179@lst.de> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-next@vger.kernel.org On 12/8/20 4:04 AM, Christoph Hellwig wrote: > Hi Qian, > > can you send me details of your device mapper setup, e.g. which targets > are used, are they used on top of whole device or partitions. Do you > use partitions on top of the dm devices? Are any other stacking devices > involved? Don't think this needs anything fancy at all - I know Pavel got his test box corrupted, and mine did as well. Looks like it pretty much affected everyone that got unlucky enough to try it, not great... Mine is just ext4 root on nvme. -- Jens Axboe