From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752362AbcIAGhM (ORCPT ); Thu, 1 Sep 2016 02:37:12 -0400 Received: from mail-wm0-f65.google.com ([74.125.82.65]:35590 "EHLO mail-wm0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752116AbcIAGhK (ORCPT ); Thu, 1 Sep 2016 02:37:10 -0400 Message-ID: <1472711826.3979.78.camel@gmail.com> Subject: Re: [patch v3.18+ regression fix] sched: Further improve spurious CPU_IDLE active migrations From: Mike Galbraith To: Vincent Guittot Cc: Peter Zijlstra , LKML , Rik van Riel Date: Thu, 01 Sep 2016 08:37:06 +0200 In-Reply-To: <1472703062.3979.60.camel@gmail.com> References: <1472535775.3960.3.camel@suse.de> <20160831100117.GV10121@twins.programming.kicks-ass.net> <1472638699.3942.14.camel@suse.de> <1472639782.3942.27.camel@gmail.com> <1472703062.3979.60.camel@gmail.com> Content-Type: text/plain; charset="us-ascii" X-Mailer: Evolution 3.16.5 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 2016-09-01 at 06:11 +0200, Mike Galbraith wrote: > I don't see a great alternative to turning it off off the top of my > head, at least for processors with multiple LLCs. Here of course I mean other than saying it's just not worth worrying about such old processors, iff it's only old dogs that are affected. Ignore it, they're dinosaurs is a valid option. I really doubt there are oodles of such boxen in active use out in the real world.. if there were, surely there would be gripes, which afaik has not happened. -Mike