From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752427AbbBQEzV (ORCPT ); Mon, 16 Feb 2015 23:55:21 -0500 Received: from ozlabs.org ([103.22.144.67]:53813 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751596AbbBQEzU (ORCPT ); Mon, 16 Feb 2015 23:55:20 -0500 Message-ID: <1424148916.31713.1.camel@ellerman.id.au> Subject: Re: [PATCH V4] tick/hotplug: Handover time related duties before cpu offline From: Michael Ellerman To: Preeti U Murthy Cc: aik@ozlabs.ru, shreyas@linux.vnet.ibm.com, linux-kernel@vger.kernel.org, anton@samba.org, tglx@linutronix.de, linuxppc-dev@lists.ozlabs.org Date: Tue, 17 Feb 2015 15:55:16 +1100 In-Reply-To: <54E2BECD.3050301@linux.vnet.ibm.com> References: <20150131041342.17103.30020.stgit@preeti.in.ibm.com> <1424138284.1808.5.camel@ellerman.id.au> <54E2BECD.3050301@linux.vnet.ibm.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.12.7-0ubuntu1 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 Tue, 2015-02-17 at 09:38 +0530, Preeti U Murthy wrote: > On 02/17/2015 07:28 AM, Michael Ellerman wrote: > > On Sat, 2015-01-31 at 09:44 +0530, Preeti U Murthy wrote: > >> These duties include do_timer to update jiffies and broadcast wakeups on those > >> platforms which do not have an external device to handle wakeup of cpus from deep > >> idle states. The handover of these duties is not robust against a cpu offline > >> operation today. > > > > Hi Preeti, > > > > This bug is still causing breakage for people on Power8 machines. > > > > Are we just waiting for Thomas to take the patch? > > Hi mpe, > > Thomas has included the patch for fixing this issue in a recent patchset > that he posted for cleaning up tick/clockevents related code. > https://lkml.org/lkml/2015/2/16/213. I think it will go into this > merge-window. There are a couple of issues there, once that is fixed I > will remind him to mark it for stable. Ah thanks. I missed it when searching LKML because it was posted by Peter. cheers