Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932771AbbHXNgI (ORCPT ); Mon, 24 Aug 2015 09:36:08 -0400 Received: from mail-wi0-f181.google.com ([209.85.212.181]:33922 "EHLO mail-wi0-f181.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754119AbbHXNgG (ORCPT ); Mon, 24 Aug 2015 09:36:06 -0400 Date: Mon, 24 Aug 2015 15:36:01 +0200 From: Frederic Weisbecker To: Ingo Molnar Cc: "Paul E. McKenney" , Peter Zijlstra , LKML , Vatika Harlalka , Chris Metcalf , Thomas Gleixner , Preeti U Murthy , Christoph Lameter Subject: Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers Message-ID: <20150824133559.GA27147@lerouge> References: <1439516774-4614-1-git-send-email-fweisbec@gmail.com> <20150823054032.GA28133@gmail.com> <20150823160101.GA11078@linux.vnet.ibm.com> <20150824064412.GA11581@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20150824064412.GA11581@gmail.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 660 Lines: 20 On Mon, Aug 24, 2015 at 08:44:12AM +0200, Ingo Molnar wrote: > 2) > > What happens if the boot CPU is offlined? (under CONFIG_BOOTPARAM_HOTPLUG_CPU0=y) > > I don't see CPU hotplug callbacks fixing up the housekeeping_mask if the boot CPU > is offlined. We have tick_nohz_cpu_down_callback() which makes sure that the timekeeper, which is the boot CPU in nohz full, never gets offlined. > > Thanks, > > Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/