Received: by 2002:ac0:e350:0:0:0:0:0 with SMTP id g16csp208793imn; Thu, 4 Aug 2022 02:51:08 -0700 (PDT) X-Google-Smtp-Source: AA6agR5Y03P15+HuhlWGsZRfm/YD7928tPUzHSFtQ0fSwR7OtQxWZOwRqWaJhD4bDIglz+4aOir9 X-Received: by 2002:a17:907:7f24:b0:72b:8e8e:11e with SMTP id qf36-20020a1709077f2400b0072b8e8e011emr793229ejc.429.1659606667768; Thu, 04 Aug 2022 02:51:07 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1659606667; cv=none; d=google.com; s=arc-20160816; b=Y0ptP1syq1S3OZayz7vL48e1AShFJHQ2J3Wp1bG/jhl6V4VB8x4ihliAdEd3P2z8/z 1JInQuvkM0HAuJ9JAqQbruLm5xhK/SorA7EZuhoDJrOkNdG79olV0d7PKmaWtXRdVFbH 6j17+K49XHwR1bHW1Uo1TjfXEzgFd7ffO2wNqfp1L9vtw7GeIp/hMoo8XOrGq96zwXKF ltRPlItzXxoxzBXIWXUGkmcR3jc3T5x8Hug0iuBQJ/6XqYlnHRTxemXRKvh4uBOjZ3QO 3gKnXPoOGVC41KQcWyk2EkyYwbevjMN8vmV2flDVW7BYxw4ubaSopKaL+2Kpsi28gDNU K3Fw== 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:sender:dkim-signature; bh=GclRhFTUyNB2tgBNOlgejkTwvXUteAeZEXRh3F16zHo=; b=yNsPsjuohWHkMmYenLhgcjxvYRGEaaICfWPyRyjHPPHuCnDYM4V4a7yEKL6AONl3OI noovKZfe+vvU6shyhLR7h8z87dzLk+rTvosZsbshh8SEe3hJgubgA3RDaVg25FNpBmqh bWWNaiU0CUWRKS313NT1zwwF4B3kiP10CDJd7UGGjTHzQ6JSsXCCxOyufDvUUi3+wVhd r3vznIYrmRNp/JOTbPE4Ms/Xd7ayTa2s2Z/jZtCBK8K14hea9kBD/PERT5e7hyTomZhQ kFdtXU/yQ7Nxxh5TnenFPzk+FFBw0m5od3mOuZ1Wywb0YjSwPhPn+ACtVSs4JVJ8G1YX fkgg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20210112 header.b=VbEkzflj; 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 jy28-20020a170907763c00b0072b566dfeb9si391591ejc.102.2022.08.04.02.50.43; Thu, 04 Aug 2022 02:51:07 -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=@gmail.com header.s=20210112 header.b=VbEkzflj; 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 S234481AbiHDIzZ (ORCPT + 99 others); Thu, 4 Aug 2022 04:55:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57686 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229665AbiHDIzV (ORCPT ); Thu, 4 Aug 2022 04:55:21 -0400 Received: from mail-ed1-x529.google.com (mail-ed1-x529.google.com [IPv6:2a00:1450:4864:20::529]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E74E210E2 for ; Thu, 4 Aug 2022 01:55:16 -0700 (PDT) Received: by mail-ed1-x529.google.com with SMTP id e13so5503035edj.12 for ; Thu, 04 Aug 2022 01:55:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=sender:date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=GclRhFTUyNB2tgBNOlgejkTwvXUteAeZEXRh3F16zHo=; b=VbEkzflj5QfHqlpWU1dZGrjIo5C+bO7jYt3m6aGPVcFC0g89cUV/v36vpWr4Hg3Dwo wqBuG2f15p9BO7BJnQLVAjhqumK7MPtyCj6nA0avInp2vqsjqNhqZbsuOwOB39ZUIOMx 6H4lM0qPS/R4zjaQUmV0iLCPkrk9ZQtaMhQ7+zKbeKH6DQ/15kc3oK6qeIUOsbCCVlJe yad7dcEt1aGIITDh+cM/2cya5AAZWshwX13FdPI98u6nCmXadGZy8sxY12Y0c1sqL0rT Q13ZlDJkxDhY8cBoMk16uhMtogDJm0p6ra/OqRS8lJp1yoyNh1FCzRk57TfkkKW8NqaZ cQDw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:sender:date:from:to:cc:subject:message-id :references:mime-version:content-disposition:in-reply-to; bh=GclRhFTUyNB2tgBNOlgejkTwvXUteAeZEXRh3F16zHo=; b=xorVYHoXKTuqbgdWYDia0J8PSTIVLrw+P+3ns+9zYLnkhs9Vz1/ehWik1uhMEhne2E YcdSRuAyaiHlw5HWShrShV9DhiJtUyFw5I7B2TyB6dwl+WFGnRAHwvmK5xx4Cbjf9P0Z taof48LkR8oUEz0qu3BlFzDJsWtcO9dRdXUJzMkp/Knf7GjDsAluUD+imQCGbqsc3bB+ eVZ4KSESP+FExW7YaYuyIFveUl1bcBCfyZzJfJE2Q497I/Y1wW8CxidS0Q6bh2yXCHAU xqg8n/BuSl6pc1qLhJy7t9AymvXwdQuHXueNQ+l7sqxHl9FXgtpoV/qCupAqFDHkbQoS X9qg== X-Gm-Message-State: ACgBeo2wsYN3mCOH61982duBSytT+InO2hkYnxIwWdagldhTI8NN54on gcCoQrkiVcpYMykh+ukfb0c= X-Received: by 2002:a05:6402:3509:b0:43b:f09d:6517 with SMTP id b9-20020a056402350900b0043bf09d6517mr1043025edd.66.1659603315561; Thu, 04 Aug 2022 01:55:15 -0700 (PDT) Received: from gmail.com (195-38-112-141.pool.digikabel.hu. [195.38.112.141]) by smtp.gmail.com with ESMTPSA id s9-20020a056402164900b0043cc66d7accsm342667edx.36.2022.08.04.01.55.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 04 Aug 2022 01:55:14 -0700 (PDT) Sender: Ingo Molnar Date: Thu, 4 Aug 2022 10:55:12 +0200 From: Ingo Molnar To: Libo Chen Cc: K Prateek Nayak , peterz@infradead.org, vincent.guittot@linaro.org, mgorman@suse.de, tim.c.chen@linux.intel.com, 21cnbao@gmail.com, dietmar.eggemann@arm.com, linux-kernel@vger.kernel.org, tglx@linutronix.de Subject: Re: [PATCH] sched/fair: no sync wakeup from interrupt context Message-ID: References: <20220711224704.1672831-1-libo.chen@oracle.com> <82620137-5aa5-6cf1-f7aa-6a298e2f7856@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Spam-Status: No, score=-1.5 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_EF,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, FSL_HELO_FAKE,HEADER_FROM_DIFFERENT_DOMAINS,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS autolearn=no 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 * Libo Chen wrote: > Oh yes, I have no issue with holding the patch back until the regression > is fully understood. I was just a little confused on your reference to > Mel's comments. [...] Yeah, that was just me getting confused about which change Mel was referring to, as I was looking for external confirmation saying what I was thinking about the patch: in_task()/in_interrupt() heuristics rarely do well. ;-) > Anyway, I will post my investigation soon. Thx - and measurements will always be able to override any negative expectations of mine, so my comments weren't a NAK. Thanks, Ingo