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=-4.0 required=3.0 tests=BAYES_00,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no 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 AE439C433DB for ; Wed, 27 Jan 2021 05:14:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6EED92068D for ; Wed, 27 Jan 2021 05:14:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232426AbhA0FNm (ORCPT ); Wed, 27 Jan 2021 00:13:42 -0500 Received: from mail-qk1-f182.google.com ([209.85.222.182]:39426 "EHLO mail-qk1-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234295AbhA0Emj (ORCPT ); Tue, 26 Jan 2021 23:42:39 -0500 Received: by mail-qk1-f182.google.com with SMTP id k193so658412qke.6 for ; Tue, 26 Jan 2021 20:42:21 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=5j9D+/U9aAgrXd3LWzWk4nGfTmqsxamWFm+S2CE5wNw=; b=S4VEJvImd2DF1vCsYDFNmGs078dFFM+UXHz/wX4KS8EGbJXY82WVe4cxEQyQ3WhWHg c8YhxwGq2SXuqiuzRnZBUyYPBL09HxrG3JjZs35E3hYFiKxhjkcutxFLV6MwSEJ+rq33 uqTcwHCrZQxVsQUU+jgc30Gooi5Evrde7TOrnBGPIt5SD6ut0lGqeCmp/Qdne07OuA2o UCIfYAHncz8RmNXIMNxGFgic2oPs/jPA/jsw9FbScgGc+zrcuDo5KqNQuM6bDxe0weUO v2kirwCnbmOrqlpSzR+5DKmITq2I3qwJa5ALfio7IDEiO+EGXBTeWIStKzQ+LA33d1nR Y9TA== X-Gm-Message-State: AOAM531/XU8eEXH1RpyAUj6ccLZYouYqeBdFmuAvx1MihHelsfETaGK7 KQZYu8HeOjf3KxCc/p5NZXgRo9lYaKVIx0ewZmQ= X-Google-Smtp-Source: ABdhPJwQ5mO0DuujWVQtwb32GXf7sZ1yeghiy+eSoGkdzlWbMjPKIk8kakXjd2yUZsNPBQ4WuZE7h9uJrYbWcbAPAfY= X-Received: by 2002:a37:aec5:: with SMTP id x188mr9191438qke.144.1611722516279; Tue, 26 Jan 2021 20:41:56 -0800 (PST) MIME-Version: 1.0 References: <20201130193842.10569-1-kan.liang@linux.intel.com> <20201130193842.10569-3-kan.liang@linux.intel.com> <20201201172903.GT3040@hirez.programming.kicks-ass.net> <20201210142515.GR2414@hirez.programming.kicks-ass.net> In-Reply-To: From: Namhyung Kim Date: Wed, 27 Jan 2021 13:41:44 +0900 Message-ID: Subject: Re: [PATCH V2 3/3] perf: Optimize sched_task() in a context switch To: Peter Zijlstra , "Liang, Kan" Cc: Ingo Molnar , linux-kernel , Stephane Eranian , Ian Rogers , Gabriel Marin , Arnaldo Carvalho de Melo , Jiri Olsa , Andi Kleen , Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, On Mon, Jan 18, 2021 at 4:04 PM Namhyung Kim wrote: > > Hi Peter and Kan, > > On Thu, Dec 10, 2020 at 11:25 PM Peter Zijlstra wrote: > > > > On Thu, Dec 10, 2020 at 08:52:55AM -0500, Liang, Kan wrote: > > > > > > > > > On 12/10/2020 2:13 AM, Namhyung Kim wrote: > > > > Hi Peter and Kan, > > > > > > > > How can we move this forward? > > > > > > Hi Namhyung, > > > > > > Thanks for the test. The changes look good to me. > > > > > > Hi Peter, > > > > > > Should we resend the patch set for further review? > > > > I've not yet seen a coherent replacement of #3, what I send was just a > > PoC. If it's the only problem of #3 which is an optimization, can we merge the actual fixes in #1 and #2 first? I know some people waiting for the fix.. Thanks, Namhyung