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 A90E0C433EF for ; Fri, 6 May 2022 20:50:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1443828AbiEFUyh (ORCPT ); Fri, 6 May 2022 16:54:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48896 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1443783AbiEFUyg (ORCPT ); Fri, 6 May 2022 16:54:36 -0400 Received: from mail-pl1-x62f.google.com (mail-pl1-x62f.google.com [IPv6:2607:f8b0:4864:20::62f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 80CE638DAB for ; Fri, 6 May 2022 13:50:51 -0700 (PDT) Received: by mail-pl1-x62f.google.com with SMTP id j14so8558340plx.3 for ; Fri, 06 May 2022 13:50:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20210112.gappssmtp.com; s=20210112; h=message-id:date:mime-version:user-agent:subject:content-language:to :cc:references:from:in-reply-to:content-transfer-encoding; bh=svtm70vhrtwaUzMmCsUIT6Egi2IpF5lFJHBTBSUBifA=; b=k93eJcUdX4CDEojINJyEsXxp6BPwyVW0KU81y0Fd5DXNq0r3T3Jeg9kORS0Pslclu7 qQBednLjdPTuAgXRX8k+dnJCDa38FqSlf/fRGoognCApgzR9LJ39k0X0tEdOwsDj+Yk8 yHioi/AfZUJFw91f/azWral+2pdGQm7lPu5MIXCzuw0I0Ymd6euxNkkwrXuaDqZ4L+Mh iYnM61GI/pQVI/bY3g1GcH4dzeEYDnTewGQh1mJciqNVDJwWZwDGklWYX9KazGwqBNIY EX0Wzq83DRzhpKoeoPLOo6N6t49kYd+3kj/9udQGiIOnD/GwLKnQQdkMlmmc7NAtZ4kR Xmfg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:date:mime-version:user-agent:subject :content-language:to:cc:references:from:in-reply-to :content-transfer-encoding; bh=svtm70vhrtwaUzMmCsUIT6Egi2IpF5lFJHBTBSUBifA=; b=WRIFt4l1iaIVtpN06e9swyOAmPAHMZ7m5noMjtg5Mgqk5QXyH6hXtR0PyMLGsHOxbz P7gBJGnXbinEQ1ajD+6mVRsM2eH9gOwlKDIBO6dVwpaQzHmlO7dkuvosOk539xRg0jLf K7MgYDK30DaDEq/LsZq4EK/21BkbL3Eg/gsl7vdkjfC0bv78FNfRJTJmLTIaL5poqsWX LrrPb3L5rMe2lG2YodpB97Ku8LfV70VDZaAQ0suue42sw6KyjWzupMcC/7PLmx8QaBDy MqEeLXda0yrFizd0T7iFbjLZA7nVAC1A1BA1Jnnuek/6qs3tkvnvcydsAOBb7OH4NiVP Z/SQ== X-Gm-Message-State: AOAM530VrSDpR0vNij+2zVlFENVxbO/isVB2yLo39B+8GL6iVxYhFYje xIY9QQvD2DgtM+8y3Z1ofFVv9smp6lUTMw== X-Google-Smtp-Source: ABdhPJzopfreODKpfWBSy4m9Jlxx414DAMKUaiFGwW300IDx3Eid79W0qvrPDksQwXeQ4gBlT/S2oA== X-Received: by 2002:a17:903:32c4:b0:15e:9f30:75e9 with SMTP id i4-20020a17090332c400b0015e9f3075e9mr5560293plr.123.1651870251011; Fri, 06 May 2022 13:50:51 -0700 (PDT) Received: from [192.168.4.166] (cpe-72-132-29-68.dc.res.rr.com. [72.132.29.68]) by smtp.gmail.com with ESMTPSA id g5-20020a17090a7d0500b001d7faf357b7sm7880977pjl.4.2022.05.06.13.50.50 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 06 May 2022 13:50:50 -0700 (PDT) Message-ID: <3b302e60-cb5a-a193-db13-5ca0ef5603cc@kernel.dk> Date: Fri, 6 May 2022 14:50:49 -0600 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux aarch64; rv:91.0) Gecko/20100101 Thunderbird/91.8.1 Subject: Re: [PATCH 5/5] io_uring: implement multishot mode for accept Content-Language: en-US To: Hao Xu , io-uring@vger.kernel.org Cc: Pavel Begunkov , linux-kernel@vger.kernel.org References: <20220506070102.26032-1-haoxu.linux@gmail.com> <20220506070102.26032-6-haoxu.linux@gmail.com> From: Jens Axboe In-Reply-To: <20220506070102.26032-6-haoxu.linux@gmail.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 5/6/22 1:01 AM, Hao Xu wrote: > @@ -5748,8 +5758,12 @@ static int io_accept(struct io_kiocb *req, unsigned int issue_flags) > if (!fixed) > put_unused_fd(fd); > ret = PTR_ERR(file); > - if (ret == -EAGAIN && force_nonblock) > - return -EAGAIN; > + if (ret == -EAGAIN && force_nonblock) { > + if ((req->flags & REQ_F_APOLL_MULTI_POLLED) == > + REQ_F_APOLL_MULTI_POLLED) > + ret = 0; > + return ret; FWIW, this if ((req->flags & REQ_F_APOLL_MULTI_POLLED) == REQ_F_APOLL_MULTI_POLLED) is identical to if (req->flags & REQ_F_APOLL_MULTI_POLLED) but I suspect this used to check more flags (??), because as it stands it seems a bit nonsensical. -- Jens Axboe