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=-19.2 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham 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 1D776C11F64 for ; Mon, 28 Jun 2021 22:30:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EF39B61CF8 for ; Mon, 28 Jun 2021 22:30:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234271AbhF1WdG (ORCPT ); Mon, 28 Jun 2021 18:33:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59168 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232323AbhF1WdF (ORCPT ); Mon, 28 Jun 2021 18:33:05 -0400 Received: from mail-wr1-x42b.google.com (mail-wr1-x42b.google.com [IPv6:2a00:1450:4864:20::42b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D677DC061574 for ; Mon, 28 Jun 2021 15:30:37 -0700 (PDT) Received: by mail-wr1-x42b.google.com with SMTP id i94so23231138wri.4 for ; Mon, 28 Jun 2021 15:30:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=fnpNuqv5iupxVuOduuZjHSkO75+tV7z8FTy20Y79QpA=; b=W2Gh1ZDvB9BlVQ8Y+M7UWLuGHXrB3H/OZevMcGFTmooOWr5l7sO0alsp5LUUX8rUJ6 75nWja16oZHXkh2LJMkJgOp/VV98ISRXzFkL5A7N2M7XuinzDmjmIX2a+f8avV//1UE1 gubRAeoF81YSe2/VR5bCQozWhykXKcNOUbS3VZRni3F5E4Gg9EeYHqSmBz0ONhVXl/V2 ewzPIG6qSy8cOquhd1CaAojK8y5OkKMWMCKjPGOBhap+CxLPhOMUnp7xINE9zuO40n0+ u4bssU/U93fx24C3vSH5qdLr9jxngS8hJTnxWi4DSCFWggNi2KfWLGJeYe2WvqCQLz4u 8ptQ== 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=fnpNuqv5iupxVuOduuZjHSkO75+tV7z8FTy20Y79QpA=; b=K+SC785eD/SuC7E7oP9mKWTlpllm3y73QkDD/Y7uKL0ViEgK/6Vrh6+aC9jCF1Ro2o p2nbNLJizkZySZNKCli0u22pLgefDh8uLLJBdn9kWuN7ufDVNeXY9zpsmfOPROLRUpkQ w6umCv4SOArGbjQwaqSyD+QinH2O6pKDU6fu4KEo1jgLW7jD/G+z3auUXTpEPZAmQC8z eJ24YuwJRcLyjO86LMHa3EANovgfYRsL1kvo7zs7lytsJ/TFKFRxDVXLe+2T41huVH1u TRPtMM8Nk6vlxLTJNTtMSpY+A3BvybJwDohcgj8O6yC5CCusKmEej1ZVTjO5OEvrAm8S TxXw== X-Gm-Message-State: AOAM531VL2GuUjJDZUzr5+SUQB/G4kfuYuj2R09FZQrBLjNqYZi8ycOq FoKD5YaxuQ3cqSRS7VQwqGvaCTt44S8= X-Google-Smtp-Source: ABdhPJznpZ+cRBjoGi9jM/gnbHLnZlGyRoqcAImycfclGaV4tSYhQpwOvNGhqvomO2wzJcvyDBktbQ== X-Received: by 2002:adf:d212:: with SMTP id j18mr1362270wrh.150.1624919435821; Mon, 28 Jun 2021 15:30:35 -0700 (PDT) Received: from [10.8.0.150] ([195.53.121.100]) by smtp.gmail.com with ESMTPSA id h10sm755568wmq.0.2021.06.28.15.30.35 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 28 Jun 2021 15:30:35 -0700 (PDT) Subject: Re: [PATCH 1/2] readv2: Note preadv2(..., RWF_NOWAIT) bug in BUGS section To: mtk.manpages@gmail.com, linux-man Cc: Will Manley References: <20210628204002.1056526-1-alx.manpages@gmail.com> From: "Alejandro Colomar (man-pages)" Message-ID: Date: Tue, 29 Jun 2021 00:30:34 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: <20210628204002.1056526-1-alx.manpages@gmail.com> 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-man@vger.kernel.org On 6/28/21 10:40 PM, Alejandro Colomar wrote: > From: Will Manley > > To save the next person before they fall foul of it. See > > and for more information. > > Signed-off-by: Will Manley > Signed-off-by: Alejandro Colomar Resend with correct linux-man@. > --- > man2/readv.2 | 11 ++++++++++- > 1 file changed, 10 insertions(+), 1 deletion(-) > > diff --git a/man2/readv.2 b/man2/readv.2 > index df42cf830..3355fa9d7 100644 > --- a/man2/readv.2 > +++ b/man2/readv.2 > @@ -243,7 +243,9 @@ If some data was successfully read, it will return the number of bytes read. > If no bytes were read, it will return \-1 and set > .IR errno > to > -.BR EAGAIN . > +.BR EAGAIN > +(but see > +.BR BUGS ")." > Currently, this flag is meaningful only for > .BR preadv2 (). > .TP > @@ -425,6 +427,13 @@ iov[1].iov_len = strlen(str1); > nwritten = writev(STDOUT_FILENO, iov, 2); > .EE > .in > +.SH BUGS > +Linux v5.9 and v5.10 have a bug where > +.BR preadv2() > +with the > +.BR RWF_NOWAIT > +flag may return 0 even when not at end of file. See > +https://lore.kernel.org/linux-fsdevel/fea8b16d-5a69-40f9-b123-e84dcd6e8f2e@www.fastmail.com/T/#u > .SH SEE ALSO > .BR pread (2), > .BR read (2), > -- Alejandro Colomar Linux man-pages comaintainer; https://www.kernel.org/doc/man-pages/ http://www.alejandro-colomar.es/