Received: by 2002:a05:6358:3188:b0:123:57c1:9b43 with SMTP id q8csp587604rwd; Sat, 20 May 2023 03:14:27 -0700 (PDT) X-Google-Smtp-Source: ACHHUZ4YSfKNOqaQOR+TudDOOFbKcpVqns3u1ujMev6xybzQf2C3PNFv4lLZygmvl5NOGrwqVjts X-Received: by 2002:a17:903:2444:b0:1a6:d9de:1887 with SMTP id l4-20020a170903244400b001a6d9de1887mr6781394pls.53.1684577667518; Sat, 20 May 2023 03:14:27 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1684577667; cv=none; d=google.com; s=arc-20160816; b=kd4ubqgZBbfEd6Iu7mkaWzOCRyVgJb+G0GNhyPOR2ZFMU6BAd1bpx2maX3p0d0P3wl 6zJUUr3VIV49+I3A4vnPpCIKXNt2aZ4E1nkllyTOk1V9h3qbRr8baZUBllpsG6knvV3B wBV5jmdpHxY8biJWGlphXBYH1UyBhX3HCzVWyPayaCCPiOc8b05RKFIqVqljq6ce17yE PIRo/mHb4LoNdGIWKys7ZSmyWRrhdQdgFU/+cPJQSRgm/5jLz008JIz3aTAf7lT1JTJo LZ2JkCE938/7mTQFHehoghUBZ09AezAo1zd9Q2iygC1UIzSz8AC/IsJFRpTOeRJemjJF fsgw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:in-reply-to:content-disposition:mime-version :references:message-id:subject:cc:to:from:date:dkim-signature; bh=ZrfZxssjgWBl3Pa60JTO/FeOmvYjpZ8WcD97kv4c468=; b=WSzLslQIZwM5k3ayUDQaEHWbukZJbD59rfOLs5kodXn26onlDN/fUXssuU620skpmt xJrKsCuLAqAuxWQe5UMidL9PPh2gtxX52GI0/moagewsXrE3O7Y+jKxsBqNOmeZ7zZBv 8ZL39uCT1m2RKlRfeoWVVST3AS7wCwEac4TphOl9skkTOee5uj5+NZyCAsVjX4dNl6dT kYXOz0Xr8Q8sxCCbT/23q+Vmira79WQCgEn4YI09X9dy8fuXs4UpAbav4UCPBrJ2Anch v58hd7x7GOlB66uSKVI+zhFeZi2Lf/lZ7BXsZEDeLgjZPNP+1+HVEjP+9xeZSQriODRq RWnA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=Od+Lz2YN; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Return-Path: Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id e8-20020a170902744800b001a966042af8si1168168plt.341.2023.05.20.03.14.08; Sat, 20 May 2023 03:14:27 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=Od+Lz2YN; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231271AbjETJik (ORCPT + 99 others); Sat, 20 May 2023 05:38:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44782 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231201AbjETJij (ORCPT ); Sat, 20 May 2023 05:38:39 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1E86CE42; Sat, 20 May 2023 02:38:38 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id B034260B61; Sat, 20 May 2023 09:38:37 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 22513C433D2; Sat, 20 May 2023 09:38:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1684575517; bh=UITJqkbSRLqe3fEc/QtOwUE1guoZf/bbfzKL1AjylCo=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=Od+Lz2YNHLKcVu5WN/P/qKOOjTtun4t+C1+WmsiHvDKiyi/1YD4kjk8JDMk8rRSQx pdzF6X4a3RaH7ynOSdzubf/a1Xc6ke7xyG2nZLvFD1dHmy9N99YZ05G4Ja6y4rSt0Z 5DMiQSN5Z/CTXeog+M63zW2PSvdYJo4WPsaFRqfdlS4ret+Hph34fjQF9Wup2qVtJe UPwZC2A52ZJrU06wIZCHJIEBzpdW1cD/I8UMb+qCLjd5Lk5YLyjJfIWJ+MgCXvZv5V 3LNN8QZa7HJ+92sBouqJiE/Dh1+rRWZKw05yYnv/nV+m/PESmveuYRRJCQSBav0lRM XDtMHCv4eXGqg== Date: Sat, 20 May 2023 11:38:30 +0200 From: Christian Brauner To: David Howells Cc: Jens Axboe , Al Viro , Christoph Hellwig , Matthew Wilcox , Jan Kara , Jeff Layton , David Hildenbrand , Jason Gunthorpe , Logan Gunthorpe , Hillf Danton , Linus Torvalds , linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Christoph Hellwig Subject: Re: [PATCH v21 06/30] splice: Check for zero count in vfs_splice_read() Message-ID: <20230520-zweieinhalb-erfragen-f9cce7c16e0c@brauner> References: <20230520000049.2226926-1-dhowells@redhat.com> <20230520000049.2226926-7-dhowells@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20230520000049.2226926-7-dhowells@redhat.com> X-Spam-Status: No, score=-7.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_HI, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, May 20, 2023 at 01:00:25AM +0100, David Howells wrote: > Make vfs_splice_read() return immediately if the length is 0. > > Signed-off-by: David Howells > cc: Christoph Hellwig > cc: Jens Axboe > cc: Al Viro > cc: linux-block@vger.kernel.org > cc: linux-fsdevel@vger.kernel.org > cc: linux-mm@kvack.org > --- Reviewed-by: Christian Brauner