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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 43576C77B7C for ; Wed, 19 Apr 2023 01:28:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231577AbjDSB2b (ORCPT ); Tue, 18 Apr 2023 21:28:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34672 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229598AbjDSB2a (ORCPT ); Tue, 18 Apr 2023 21:28:30 -0400 Received: from mail-pg1-x532.google.com (mail-pg1-x532.google.com [IPv6:2607:f8b0:4864:20::532]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0B6086183 for ; Tue, 18 Apr 2023 18:28:29 -0700 (PDT) Received: by mail-pg1-x532.google.com with SMTP id 41be03b00d2f7-51b914ffe71so245424a12.1 for ; Tue, 18 Apr 2023 18:28:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20221208.gappssmtp.com; s=20221208; t=1681867708; x=1684459708; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=fORvDtycGEYAP00Go8Gr75NbmrQRJi6legeNyHFvVc4=; b=LrmAEIyGSJiRmmpboUhhQgqPcY35ao1RN/OmUVmJ2+dtZKoCNZbb8NLxueipM+G5cL 7Z8Nwal6Jz63ieQNUvv003Q/cAVuE98OeSDB3Ay0Doy0h7oKAWn5SO9oU40wJCf0tbCQ BQ42zZnn0Cg/VQDTeWslhL7Wd8s61avskpFcinz3IKJk+gNlExkijnMyMDYHJlhUHd5M 8IVAzrRyL0O2Bazz7z+f5qoE6nxJXJFFSe3jLE/4Y/nctAfi6fljhWgSEFtC2xGzhK5C mIW0MC0YJkbwEU94y4kb1t2bC6NCGfVeKEG9Yso2dAk27EpJOXvZk/aks8gm/9xAtK5z hsig== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1681867708; x=1684459708; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=fORvDtycGEYAP00Go8Gr75NbmrQRJi6legeNyHFvVc4=; b=dNFrxUntHvQcEZT1NfPzGMpvdBKuRvM04I0jNqUrx6q+UlY8klFuECfEkEWTVWm6F5 nwz3gby+/okHR/Ocl+GDpKinD7MUOVT+mlIJT0vVSiDtzr6NNUx3BNYcbAJpWkk6329K V3I0K2YtYUoTjs3dSWYG3WINty1bZVavsMXd/la+eaOrwCZK1twMd3QV/dVRhAq8QGcX XluiB0OsrUiNvcSh3Se74j4iLsV21LuV9r9mFPOpclUwBRrHkw05w7USbuybeCC2l61F /ImKsMsLk/O3JNhaO/gsEuqwXRcQ2ju/kpiillmj3BIosJgW2GgkufBWv367mbRKU5+O OZwQ== X-Gm-Message-State: AAQBX9fe65OqUR20ok5LYf6HRmoTmHntmVckGyVs/DwjxRaVLr4hObHx 4v9/G25pmSzE3EvfcGSVKGPLcuUbOlul9XFGrcw= X-Google-Smtp-Source: AKy350ZW2i/ZFxByFt235VEJD3loFwfTTKFlgazg6SB7eTiGwpib5QWAwouBg+e5G+DCGghYaT9aug== X-Received: by 2002:a17:902:dad1:b0:1a1:956d:2281 with SMTP id q17-20020a170902dad100b001a1956d2281mr19890233plx.3.1681867708384; Tue, 18 Apr 2023 18:28:28 -0700 (PDT) Received: from [192.168.1.136] ([198.8.77.157]) by smtp.gmail.com with ESMTPSA id x24-20020a1709027c1800b001a50ede5086sm10206660pll.51.2023.04.18.18.28.27 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 18 Apr 2023 18:28:28 -0700 (PDT) Message-ID: Date: Tue, 18 Apr 2023 19:28:26 -0600 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux aarch64; rv:102.0) Gecko/20100101 Thunderbird/102.9.0 Subject: Re: [PATCH 1/2] fs: add FMODE_DIO_PARALLEL_WRITE flag Content-Language: en-US To: Dave Chinner , Bernd Schubert Cc: Miklos Szeredi , "Darrick J. Wong" , Christoph Hellwig , "io-uring@vger.kernel.org" , "linux-ext4@vger.kernel.org" , "linux-fsdevel@vger.kernel.org" , "linux-xfs@vger.kernel.org" , Dharmendra Singh References: <20230307172015.54911-2-axboe@kernel.dk> <20230412134057.381941-1-bschubert@ddn.com> <20230414153612.GB360881@frogsfrogsfrogs> <20230418221300.GT3223426@dread.disaster.area> From: Jens Axboe In-Reply-To: <20230418221300.GT3223426@dread.disaster.area> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org On 4/18/23 4:13?PM, Dave Chinner wrote: >>> Without first attempting to answer those questions, I'd be reluctant >>> to add FMODE_DIO_PARALLEL_WRITE to fuse. > > I'd tag it with this anyway - for the majority of apps that are > doing concurrent DIO within EOF, shared locking is big win. If > there's a corner case that apps trigger that is slow, deal with them > when they are reported.... Agree, the common/fast case will be fine, which is really the most important part. -- Jens Axboe