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 286E4C001B0 for ; Sun, 23 Jul 2023 17:36:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229723AbjGWRgB (ORCPT ); Sun, 23 Jul 2023 13:36:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33212 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229711AbjGWRgA (ORCPT ); Sun, 23 Jul 2023 13:36:00 -0400 Received: from wp530.webpack.hosteurope.de (wp530.webpack.hosteurope.de [80.237.130.52]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 67F9DE5F; Sun, 23 Jul 2023 10:35:56 -0700 (PDT) Received: from [2a02:8108:8980:2478:8cde:aa2c:f324:937e]; authenticated by wp530.webpack.hosteurope.de running ExIM with esmtpsa (TLS1.3:ECDHE_RSA_AES_128_GCM_SHA256:128) id 1qNczk-00014o-Ba; Sun, 23 Jul 2023 19:35:48 +0200 Message-ID: Date: Sun, 23 Jul 2023 19:35:47 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.13.0 Subject: Re: [PATCH 6.4 800/800] io_uring: Use io_schedule* in cqring wait Content-Language: en-US, de-DE From: "Linux regression tracking #update (Thorsten Leemhuis)" To: Oleksandr Natalenko , stable@vger.kernel.org Cc: Greg Kroah-Hartman , Pavel Begunkov , io-uring@vger.kernel.org, linux-kernel@vger.kernel.org, Andres Freund , Jens Axboe , Linux kernel regressions list Reply-To: Linux regressions mailing list , Linux regressions mailing list References: <20230716194949.099592437@linuxfoundation.org> <20230716195007.731909670@linuxfoundation.org> <12251678.O9o76ZdvQC@natalenko.name> <03b96f88-559c-454a-702c-90b0ca50b3b6@leemhuis.info> In-Reply-To: <03b96f88-559c-454a-702c-90b0ca50b3b6@leemhuis.info> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-bounce-key: webpack.hosteurope.de;regressions@leemhuis.info;1690133756;9034c4c5; X-HE-SMSGID: 1qNczk-00014o-Ba Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org On 23.07.23 14:11, Linux regression tracking #adding (Thorsten Leemhuis) wrote: > On 23.07.23 11:39, Oleksandr Natalenko wrote: >> On neděle 16. července 2023 21:50:53 CEST Greg Kroah-Hartman wrote: >>> From: Andres Freund >>> >>> commit 8a796565cec3601071cbbd27d6304e202019d014 upstream. >>> >>> I observed poor performance of io_uring compared to synchronous IO. That >>> turns out to be caused by deeper CPU idle states entered with io_uring, >>> due to io_uring using plain schedule(), whereas synchronous IO uses >>> io_schedule(). > #regzbot introduced 8a796565cec360107 ^ > https://bbs.archlinux.org/viewtopic.php?id=287343 > https://bugzilla.kernel.org/show_bug.cgi?id=217700 > https://bugzilla.kernel.org/show_bug.cgi?id=217699 > #regzbot title block: io_uring: high iowait rates and stalls > #regzbot ignore-activity Apparently expected behavior: https://lore.kernel.org/lkml/538065ee-4130-6a00-dcc8-f69fbc7d7ba0@kernel.dk/ #regzbot resolve: notabug: on a closer look it turned out that's expected behavior Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat) -- Everything you wanna know about Linux kernel regression tracking: https://linux-regtracking.leemhuis.info/about/#tldr That page also explains what to do if mails like this annoy you. #regzbot ignore-activity