From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753702AbbDAMAd (ORCPT ); Wed, 1 Apr 2015 08:00:33 -0400 Received: from bombadil.infradead.org ([198.137.202.9]:45940 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753290AbbDAMA2 (ORCPT ); Wed, 1 Apr 2015 08:00:28 -0400 Date: Wed, 1 Apr 2015 13:59:57 +0200 From: Peter Zijlstra To: Lai Jiangshan Cc: linux-kernel@vger.kernel.org, Thomas Gleixner , Christoph Lameter , Kevin Hilman , Mike Galbraith , Viresh Kumar , Frederic Weisbecker , Ingo Molnar , Ingo Molnar Subject: Re: [PATCH] sched,nohz: fallback to housekeeping cpus before fallback to possible cpus Message-ID: <20150401115957.GL23123@twins.programming.kicks-ass.net> References: <1427879172-22711-1-git-send-email-laijs@cn.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1427879172-22711-1-git-send-email-laijs@cn.fujitsu.com> User-Agent: Mutt/1.5.21 (2012-12-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Apr 01, 2015 at 05:06:12PM +0800, Lai Jiangshan wrote: > Let the processes which lose they original cpus run on housekeeping cpus > if they can to reduce disturbances on nohz_full cpus. Its a fail if you get here in the first place, why should we fix that?