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=-10.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,NICE_REPLY_A,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 2C790C49EA7 for ; Wed, 23 Jun 2021 22:24:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 110826100A for ; Wed, 23 Jun 2021 22:24:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229933AbhFWW0d (ORCPT ); Wed, 23 Jun 2021 18:26:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53726 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229906AbhFWW0c (ORCPT ); Wed, 23 Jun 2021 18:26:32 -0400 Received: from mail-io1-xd29.google.com (mail-io1-xd29.google.com [IPv6:2607:f8b0:4864:20::d29]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AAE48C06175F for ; Wed, 23 Jun 2021 15:24:13 -0700 (PDT) Received: by mail-io1-xd29.google.com with SMTP id i189so5426432ioa.8 for ; Wed, 23 Jun 2021 15:24:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20150623.gappssmtp.com; s=20150623; h=subject:to:references:from:message-id:date:user-agent:mime-version :in-reply-to:content-language:content-transfer-encoding; bh=rarFiEcktOV4PMyvDV95VcjSVtUjs4RdLS31HBip5uA=; b=lE18ucs7drfzcX+0pjDbjf8JgBhEqOnLDKsssvstFzfaLG4LXqUhNmb23n2OZm1CLW 5t4kdONyJzEb5dcke/lmdRBs5T3a3UFcCGh4xZMhNgx7kpgoWZVHfuuuqCSXCUlBZY9B X12yTjz32/pvuyfob3DXa6+5Na58NQXckEia2kAD0lyvMQGf0MWhira1HTjvFXXQLwXi 0aAED1oC2VMRSdseHbd28orq3+1n4VoQwdfrc4qMHIe2xHBM6Fc4OwPQUV5S7osjO3Rf q7oJVXKbb2mDbKR2YIGLt1m/r2KmgvwX6bNJf+IQRKJd4NtGFeiGkW8jFzKrdulyZWvk nVmQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=rarFiEcktOV4PMyvDV95VcjSVtUjs4RdLS31HBip5uA=; b=tYCLjmvGWo80APyoMdQZ3W1xo3qMf+eFX8WRoxUDZq1g9b5mdvNrvWpNcx1SzD401O CNl6CocZuOoaLBoOSowrZNHcVVdctypAzdJ+qXTnxFmWA3KQMTwfzmtJ0GrrQ8yAHKuD 12DYSEhlTq+iTXeVKq/dZfQCuG0CfYxd5hndl62NniDKJPtwZdbs1HMAQzCng4wLWCyW Zfp6Aq0P8Dk1Tq3aNIqPdrc6pBwdG3EumsXvmdoZNK7amQXhitRf7a1eRporIDn5hgqP 3OYx6XYmnf8F8QHBgFWouCJ+O4zMKQ6cZDOpLQoG11rUozW9Fd1jrxVOvursY8faS/iy rsvA== X-Gm-Message-State: AOAM532Wwwlgnvfo6nppv2laJu5O0KRCM4TAOwpvmKlrSjmN47s5YyTS dbnRraGIbcjaMqc85KNb/93DDlajlkbxPg== X-Google-Smtp-Source: ABdhPJwUZbCdMymItjEzWVPFYctd082FTIQe8OkbfvcjtyCef5RL0iJF8c+C8d4s/rDpQAyCEg8muw== X-Received: by 2002:a05:6638:379d:: with SMTP id w29mr1727299jal.2.1624487052609; Wed, 23 Jun 2021 15:24:12 -0700 (PDT) Received: from [192.168.1.134] ([198.8.77.61]) by smtp.gmail.com with ESMTPSA id b23sm168772ior.4.2021.06.23.15.24.11 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 23 Jun 2021 15:24:12 -0700 (PDT) Subject: Re: [PATCH v2 0/2] Minor SQPOLL thread fix and improvement To: Olivier Langlois , Pavel Begunkov , io-uring@vger.kernel.org, linux-kernel@vger.kernel.org References: From: Jens Axboe Message-ID: Date: Wed, 23 Jun 2021 16:24:10 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 6/23/21 12:50 PM, Olivier Langlois wrote: > I have been investigated a deadlock situation in my io_uring usage where > the SQPOLL thread was going to sleep and my user threads were waiting > inside io_uring_enter() for completions. > > https://github.com/axboe/liburing/issues/367 Applied, thanks. -- Jens Axboe