From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758218AbcCCRqi (ORCPT ); Thu, 3 Mar 2016 12:46:38 -0500 Received: from www.linutronix.de ([62.245.132.108]:60102 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932374AbcCCRqh (ORCPT ); Thu, 3 Mar 2016 12:46:37 -0500 Date: Thu, 3 Mar 2016 18:45:11 +0100 (CET) From: Thomas Gleixner To: Peter Zijlstra cc: Ingo Molnar , linux-kernel@vger.kernel.org, jschoenh@amazon.de, oleg@redhat.com Subject: Re: [PATCH] sched: Allow per-cpu kernel threads to run on online && !active In-Reply-To: Message-ID: References: <20160301152303.GV6356@twins.programming.kicks-ass.net> <20160303115553.GN6344@twins.programming.kicks-ass.net> User-Agent: Alpine 2.11 (DEB 23 2013-08-11) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 3 Mar 2016, Thomas Gleixner wrote: > On Thu, 3 Mar 2016, Peter Zijlstra wrote: > > > +++ b/kernel/sched/core.c > > > @@ -5726,23 +5726,6 @@ static int sched_cpu_active(struct notif > > > case CPU_STARTING: > > > set_cpu_rq_start_time(); > > > > If we stick that in notify_starting() we can kill all of this. > > Yep. I'm going to kill that one by one :) After I'm done fixing the wreckage which is caused by moving set_active() alone. The numa and cpuset muck rely on it .... But now that we can delay random workload on the upcoming/outgoing cpu we can move that stuff alltogether. Thanks, tglx