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=-8.2 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=unavailable 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 12C4AC433E1 for ; Fri, 10 Jul 2020 17:52:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D6FE22078D for ; Fri, 10 Jul 2020 17:52:29 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=toxicpanda-com.20150623.gappssmtp.com header.i=@toxicpanda-com.20150623.gappssmtp.com header.b="Ez/bv/5D" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727924AbgGJRw3 (ORCPT ); Fri, 10 Jul 2020 13:52:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47128 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726962AbgGJRw2 (ORCPT ); Fri, 10 Jul 2020 13:52:28 -0400 Received: from mail-qk1-x741.google.com (mail-qk1-x741.google.com [IPv6:2607:f8b0:4864:20::741]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A4F87C08C5DC for ; Fri, 10 Jul 2020 10:52:28 -0700 (PDT) Received: by mail-qk1-x741.google.com with SMTP id c139so6077572qkg.12 for ; Fri, 10 Jul 2020 10:52:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=toxicpanda-com.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=z/EptbW5l5MlTK8iv4lqndCFmdDwMl00L4o7dddZcU0=; b=Ez/bv/5D+7tFESuhn9k7WjcLZnnwQyMLqHBllKwyW1T/oJwT33VKLBet1y6PzkPqTX +pvCDOzktxICTq/ajVhFg5U9GAXmyIhwlPN8ypMWqzfwFdxu5J1M4UpA2vMplZbf9aXa Nbqv3QsDjr4vvaFR4kSuRr1zH2VDG8+t1BoszfZ/g7TPmAFx4jz25YRzRb3dSPh/O1as 69zbh0K9XzvSFERi8oCeuriZhTg7kBSQLcJu7fq6nk5ZukHCgm5m4lxiKNBj9BuMrm++ h3nyPBcChYWVugnARelnAulwgbyKpw4MsLMo5489dkFMpasBpH2OROJU5GCn/FwnsD1v 8MXg== 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=z/EptbW5l5MlTK8iv4lqndCFmdDwMl00L4o7dddZcU0=; b=RUb32RXP8Pznrr9N77mYg8Bgl+1qo6vMK6k5Dplv68C2bPE69/ivp5tSAZCv7RzFYq dIni11daHqgnJja9fJt+/yDBlDCfbpXKYbLA+/ZyAOlgRIFZxc7pGFhIB4P9kkILym5P D3Ld+PfYPg6pW0tw6qYLtX4EQlirrQe+/M89SvRJs2J/9ci49Fk8+kUJgKC1ZD1800HU MhPBU7jR1PANg+n1WHL4D0ssDglqfm+jHGCpAjP5xxHcTt5Bkzt8JG8dE0C8eGCgOiYz vKW6bJuCNUrciHTLDrZ7rHulBWKFfuQyFM8z4TkUC6iN/Ho9VUd3KoFJ/5wGWcyx4GXx nsGQ== X-Gm-Message-State: AOAM531JTmUtKxNbZTeBSf3JeNPiE+upq/vMZCMMXLrVP/dO3w38gzzg osX4uj9aUKM+SWW3/Bjwj7IH2mWSq9GA4Q== X-Google-Smtp-Source: ABdhPJy+fakZnr5H9Yi75eg6ca9yYWo4GVWxwEGvLucV1Llpwri1a+7ByKvnC6Vfo3UmuYN6zLCusg== X-Received: by 2002:a05:620a:1235:: with SMTP id v21mr52811688qkj.454.1594403547564; Fri, 10 Jul 2020 10:52:27 -0700 (PDT) Received: from [192.168.1.45] (cpe-174-109-172-136.nc.res.rr.com. [174.109.172.136]) by smtp.gmail.com with ESMTPSA id o50sm8802506qtc.64.2020.07.10.10.52.26 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 10 Jul 2020 10:52:26 -0700 (PDT) Subject: Re: [PATCH v2] generic: add a test for umount racing mount To: Boris Burkov , fstests@vger.kernel.org Cc: linux-btrfs@vger.kernel.org References: <20200710171836.127889-1-boris@bur.io> From: Josef Bacik Message-ID: <641e25ca-17bd-034a-9970-2396fe238c81@toxicpanda.com> Date: Fri, 10 Jul 2020 13:52:25 -0400 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <20200710171836.127889-1-boris@bur.io> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org On 7/10/20 1:18 PM, Boris Burkov wrote: > Test if dirtying many inodes (which can delay umount) then > unmounting and quickly mounting again causes the mount to fail. > > A race, which breaks the test in btrfs, is fixed by the patch: > "btrfs: fix mount failure caused by race with umount" > > Signed-off-by: Boris Burkov Reviewed-by: Josef Bacik Thanks, Josef