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 D6ECAC433DB for ; Mon, 22 Feb 2021 09:47:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A0EF864EDF for ; Mon, 22 Feb 2021 09:47:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229989AbhBVJre (ORCPT ); Mon, 22 Feb 2021 04:47:34 -0500 Received: from mail-lj1-f173.google.com ([209.85.208.173]:41651 "EHLO mail-lj1-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229995AbhBVJrV (ORCPT ); Mon, 22 Feb 2021 04:47:21 -0500 Received: by mail-lj1-f173.google.com with SMTP id e17so56111133ljl.8 for ; Mon, 22 Feb 2021 01:47:04 -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=4IhNxvaEzerjfy9TDwo9/XQFb4xj9POVW73cIDqBPXE=; b=YKT0MOsGktSLFBBcL0dWhf6JU9x3WdG+ReSjIdHFdi+sKDPUzK8CpkIZHBNkbC5TTn yLCK1/8ivadAsRK6vrH6C4XES+q4o4LA63zUOKsewFN3lFssHzpD/YS49vTSXqO1KCCI p+gNbUhZ8dZTUQLy1ECJoyNR6lm9fI1eIBm7rjacsV6i6TplIH3PTo/OoxVaXOEe2WWH cjcVqfW1QOCx2B4+fAHqeN7NYFEHzvNSqF6EO+uIDeJS4/8AKZwBSN5AwxUugAW39Mwv 3Dep4VwO/n7eHfWHdOLb/SSQwhdyoR/IXfmDx/wjIgN777zQajsqEelTDkSB4j21pVb9 yPXw== X-Gm-Message-State: AOAM530BFRFGPv62RCtbFtUBwUPwMSkKEshoSfilHNBVQNgZuxN3WYGa kRNMF1enXJ4TMxZZIhUY6P6eWciHAXaNtukrrsU= X-Google-Smtp-Source: ABdhPJyVt0cliP/Ol1/vMZiZv/yLAjQZTNc7QhNFxHnphtJD+O5mMlIUKDb/uyX+uSYWYpCJ6gEZ97s139asX0wOj5Q= X-Received: by 2002:a05:651c:2042:: with SMTP id t2mr13146997ljo.233.1613987199129; Mon, 22 Feb 2021 01:46:39 -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: Mon, 22 Feb 2021 18:46:27 +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 On Wed, Jan 27, 2021 at 1:41 PM Namhyung Kim wrote: > > 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.. Ping again... Thanks, Namhyung