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=-0.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS 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 8E561C43603 for ; Tue, 17 Dec 2019 19:06:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6179D2082E for ; Tue, 17 Dec 2019 19:06:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576609583; bh=EufUm8Rlv07vlIaR75IoqVXFe8iiNhL6VCsyeR53rwI=; h=References:In-Reply-To:From:Date:Subject:To:Cc:List-ID:From; b=trMvBqD7iFpyZ0caGAimpqkpiBrP+PlrmGBJTMPjCJzS+wkqL14+F/DoFGJp3uxd8 IQ4GSEj7HL1J3Hc3iyZeYOb0MJePuuDbp//jcxAw4gPs8d6FZmJmZY8u3geUghzG86 FPwFwOtqfI/bGjgJZ5yN4RVcWPfaZpwwaEY5D/L0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727794AbfLQTGW (ORCPT ); Tue, 17 Dec 2019 14:06:22 -0500 Received: from mail-lf1-f68.google.com ([209.85.167.68]:44161 "EHLO mail-lf1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726731AbfLQTGW (ORCPT ); Tue, 17 Dec 2019 14:06:22 -0500 Received: by mail-lf1-f68.google.com with SMTP id v201so7720537lfa.11 for ; Tue, 17 Dec 2019 11:06:20 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=0Ot2v/dbw1SUHMmXwBLstSNPNheDv1TXN9bQInDFN7E=; b=LTuQlJ5r8Jxu7pBZudU42TBMrRjt9vba2RyiTlgEfs36AOeEsEcToirt9lzqXpJwKh kwPnYF5aIgWiX6r9iBjqyUsufjqF7AkbUnXay/VfQbQGzwitZsz3FB3tL2AZAcLKOymc rn+4WGCrGxe0+9+fX6GzLSyaGP36uj9m4k+0w= 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=0Ot2v/dbw1SUHMmXwBLstSNPNheDv1TXN9bQInDFN7E=; b=C2jUHuXAbl9zIpgyt2oWjDx+uOTy1+iA7DiGopOoZqYINoHzDSYoW6ZGAUNfrl1bD2 p5i3Xpps521EUElKrD8zLdvrOCzYmqKfK9Glkam0uTkm6qxHFWGpKRQDx+MINyCyD2l8 cBxyzXhB/o33+mejjUPkn+I5+RXNwFQqgbJDdw1TfNlVqAOdHfogw/FUpfFY3iY7ztIh PgJd5bo4Y7sP2v7cB5/3v50B3Fpx8LnQa8p1d5spb85F2QBdmff4gnNa5ZEnG/fJaQ2+ ifYhX9sg7/XWiqbUJVentoDEziyleZIjZGWS8et9asfhFrCaILAwtXPfeMHBKVtMCZwH SZUg== X-Gm-Message-State: APjAAAWcXdZXls11KFV+hFTyV3dNwcPaYMcHuaquyvL0OnoJTu8n0IqK eTTnsh76o7KN+/u6ca5HzV134K+EQ8k= X-Google-Smtp-Source: APXvYqyP+Q7ZsGhVDzVURr9L/ZmM/LONZs+zO7Vuljv6SRatB8ccEJI5i+EZJU/L8UoDsqQLDxDBJg== X-Received: by 2002:a19:4351:: with SMTP id m17mr3819181lfj.61.1576609579566; Tue, 17 Dec 2019 11:06:19 -0800 (PST) Received: from mail-lf1-f46.google.com (mail-lf1-f46.google.com. [209.85.167.46]) by smtp.gmail.com with ESMTPSA id r21sm2624609ljn.64.2019.12.17.11.06.17 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 17 Dec 2019 11:06:17 -0800 (PST) Received: by mail-lf1-f46.google.com with SMTP id 15so7770615lfr.2 for ; Tue, 17 Dec 2019 11:06:17 -0800 (PST) X-Received: by 2002:ac2:4946:: with SMTP id o6mr3733141lfi.170.1576609577028; Tue, 17 Dec 2019 11:06:17 -0800 (PST) MIME-Version: 1.0 References: <20191217113425.GA78787@gmail.com> In-Reply-To: <20191217113425.GA78787@gmail.com> From: Linus Torvalds Date: Tue, 17 Dec 2019 11:06:00 -0800 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [GIT PULL] perf fixes To: Ingo Molnar Cc: Linux Kernel Mailing List , Arnaldo Carvalho de Melo , Jiri Olsa , Peter Zijlstra , Thomas Gleixner , Andrew Morton Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Dec 17, 2019 at 3:34 AM Ingo Molnar wrote: > > Note that the large CPU count related fixes go beyond regression fixes - > but the IPI-flood symptoms are severe enough that I think justifies their > inclusion. If it's too much we'll redo the branch. I'm much less sensitive to the perf _tooling_ changes than I am to actual kernel code changes. Of course, if you start having a history of breaking things during the rc kernels, that may change, but at least for now, I tend to look at diffstats and go "oh, this is perf tooling", and not worry too much about it... Linus