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=1.4 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FSL_HELO_FAKE,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 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 C074EC432C0 for ; Mon, 25 Nov 2019 15:08:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 969CB20740 for ; Mon, 25 Nov 2019 15:08:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1574694498; bh=5Hj4gAGkP8GoOYEWBiLZ2o5hpaesQxMs9VVRS+5bR3Y=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=XUBff7mm+EWm00qDatSN+3QLkh8huqBEtuSRRwOYNHk3xBKsjNuL4qoYdXzvTlHWF +yZQ35rGbC7Z5y4+j5TlISYwpal3usUgLs/yAHkpCsle6+T4ZJ5I4OGrFwlPVMmbkr CoTEpVz72FEXWdO9kpu+JUfp8jHMSMoEYSnmsEsk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728455AbfKYPIR (ORCPT ); Mon, 25 Nov 2019 10:08:17 -0500 Received: from mail-wm1-f66.google.com ([209.85.128.66]:52562 "EHLO mail-wm1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727758AbfKYPIR (ORCPT ); Mon, 25 Nov 2019 10:08:17 -0500 Received: by mail-wm1-f66.google.com with SMTP id l1so15813984wme.2 for ; Mon, 25 Nov 2019 07:08:14 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=z0I/vvRv/FeVTegY7J6G12JD9kr0hp3pUvS0FB/3p5M=; b=Z7BD44h5Bd8jZiYosKKeartA0rTtdwQF359A8aMpBYPcpVrSge42t4xpHxaqkJQbSe m4y/UTfQigJrgT58Np3jhX4LjopYnNLWLsA489bvivOUEGQ/rOr47E6O6+Z/s2kZaM+j 7pfvCdMpDUv16ZhyLqoQKN0sngWhr9+ZT35TaTnPAPUZUB3BSkfSQd8DleyrgBxaMADZ r6Hw3tCGjHftJqLf4HTI9mgkzRWb64BM7seW/OSNLptptZ6fL93XPitTWXvxe+pkxQn9 kOVHfI5rIxbFBQOSOH30P7eo3tQQrD6303uEMFnW91dTkOpqO2EHj4a8l+aGcJl8BTYf Kh4g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:from:to:cc:subject:message-id :references:mime-version:content-disposition:in-reply-to:user-agent; bh=z0I/vvRv/FeVTegY7J6G12JD9kr0hp3pUvS0FB/3p5M=; b=TShzUbw4ECgsdo+FP/sUeDeNp+wp+bk8fdICTBjjXO1pKlQKTPjOZuk5uBZS8X1cOG b1Mtt3Nc8TumIXGcH9CzxIl7sX4blGXwBjgRccmz8NwUa+6SC5OFvJaSDtt01HEMWRky mkom8u0SY0V2kaAJimfblQnEG/WZFc8qkMR/ai4G/Q7/kraw8WqZrJWae0WTpeDXQlod yhT1u2/0uQDtBLQmV6gJWlARQ4R4C3dAVtGvUSnCoBiZVnMLnMH0KMTM+4oGQd9M9pC6 g0KWrXIqKurdlRLbcZsf2NOYlkitdG+ysXNWtEvlA5XWIdWDvWJ5j7ZqkaG3d8vJjq1L ROFA== X-Gm-Message-State: APjAAAWia/RnbDnMgfB8LF4xu5FviJHFsPoOL6GOdSh7oRnyQBits4Rr 192/nhC/V3x60AkdUzk2qd8= X-Google-Smtp-Source: APXvYqzKnItFU3HrxP4rIurAJNnGgJVKkH9IFKKSrH/EE54ddwd8P9M3Bzh+kW8OHVIhfg5yu7KVPA== X-Received: by 2002:a7b:c5d0:: with SMTP id n16mr26071133wmk.78.1574694494076; Mon, 25 Nov 2019 07:08:14 -0800 (PST) Received: from gmail.com (54033286.catv.pool.telekom.hu. [84.3.50.134]) by smtp.gmail.com with ESMTPSA id a15sm11447120wrx.81.2019.11.25.07.08.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 25 Nov 2019 07:08:13 -0800 (PST) Date: Mon, 25 Nov 2019 16:08:11 +0100 From: Ingo Molnar To: Valentin Schneider Cc: Linus Torvalds , linux-kernel@vger.kernel.org, Peter Zijlstra , Thomas Gleixner , Vincent Guittot , Dietmar Eggemann , Mel Gorman , Ben Segall , Steven Rostedt , Juri Lelli Subject: Re: [GIT PULL] scheduler changes for v5.5 Message-ID: <20191125150811.GA116487@gmail.com> References: <20191125125944.GA22218@gmail.com> <9af8a5eb-5104-ad0b-bf46-dedb65d66a07@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <9af8a5eb-5104-ad0b-bf46-dedb65d66a07@arm.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Valentin Schneider wrote: > On 25/11/2019 12:59, Ingo Molnar wrote: > > So I really don't want to be labeled as "that annoying scheduler PR guy", > but some patches in Vincent's rework should be squashed to avoid being > performance bisection honeypots. I really didn't want to do an intrusive rebasing of the Git tree though, especially as we didn't know whether the improvements a) improved things b) were stable: > > Vincent Guittot (14): > > sched/fair: Remove meaningless imbalance calculation > > sched/fair: Rework load_balance() > > These two ^ (were split for ease of reviewing, [1]) > > > sched/fair: Rework find_idlest_group() > > sched/fair: Fix rework of find_idlest_group() > > And these two ^ (Mel voiced similar concerns at [2]) We can give testers a linearized tree for testing, should this come up (which I doubt it will ...), ok? Thanks, Ingo