From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760009Ab2IFVMZ (ORCPT ); Thu, 6 Sep 2012 17:12:25 -0400 Received: from ogre.sisk.pl ([193.178.161.156]:40569 "EHLO ogre.sisk.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751944Ab2IFVMW (ORCPT ); Thu, 6 Sep 2012 17:12:22 -0400 From: "Rafael J. Wysocki" To: Daniel Lezcano Subject: Re: CONFIG_NO_HZ + CONFIG_CPU_IDLE freeze the system (Was Re: [PATCH] acpi : remove power from acpi_processor_cx structure) Date: Thu, 6 Sep 2012 23:18:42 +0200 User-Agent: KMail/1.13.6 (Linux/3.6.0-rc3+; KDE/4.6.0; x86_64; ; ) Cc: xen-devel@lists.xensource.com, linaro-dev@lists.linaro.org, Konrad Rzeszutek Wilk , linux-pm@vger.kernel.org, linux-acpi@vger.kernel.org, lenb@kernel.org, Frederic Weisbecker , Linux Kernel Mailing List References: <1343164349-28550-1-git-send-email-daniel.lezcano@linaro.org> <201209062204.11288.rjw@sisk.pl> <50490920.9070204@linaro.org> In-Reply-To: <50490920.9070204@linaro.org> MIME-Version: 1.0 Content-Type: Text/Plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <201209062318.42874.rjw@sisk.pl> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thursday, September 06, 2012, Daniel Lezcano wrote: > On 09/06/2012 10:04 PM, Rafael J. Wysocki wrote: > > On Thursday, September 06, 2012, Daniel Lezcano wrote: > >> On 09/06/2012 09:54 AM, Daniel Lezcano wrote: > >>> On 09/05/2012 03:41 PM, Rafael J. Wysocki wrote: > >>>> On Saturday, September 01, 2012, Rafael J. Wysocki wrote: > >>>>> On Friday, August 31, 2012, Daniel Lezcano wrote: > >>>>>> On 07/24/2012 11:06 PM, Konrad Rzeszutek Wilk wrote: > >>>>>>> On Tue, Jul 24, 2012 at 11:12:29PM +0200, Daniel Lezcano wrote: > >>>>>>>> Remove the power field as it is not used. > >>>>>>>> > >>>>>>>> Signed-off-by: Daniel Lezcano > >>>>>>>> Cc: Konrad Rzeszutek Wilk > >>>>>>> Acked. > >>>>>> Hi Rafael, > >>>>>> > >>>>>> I did not see this patch going in. Is it possible to merge it ? > >>>>> I think so. I'll take care of it when I get back from LinuxCon/Plumbers Conf. > >>>>> (early next week). > >>>> Applied to the linux-next branch of the linux-pm.git tree as v3.7 material. > >>> Thanks Rafael. > >>> > >>>> Are there any other patches you want me to consider for v3.7? > >>> Yes please, I have the per cpu latencies ready to be submitted but I > >>> want to do extra testing before. Unfortunately, the linux-pm-next hangs > >>> at boot time on my intel dual core (not related to the patchset). > >>> > >>> I am git bisecting right now. > >> > >> I found the culprit. This is not related to the linux-pm tree but with > >> net-next. > >> The following patch introduced the issue. > >> > >> commit 6bdb7fe31046ac50b47e83c35cd6c6b6160a475d > >> Author: Amerigo Wang > >> Date: Fri Aug 10 01:24:50 2012 +0000 > >> > >> netpoll: re-enable irq in poll_napi() > >> > >> napi->poll() needs IRQ enabled, so we have to re-enable IRQ before > >> calling it. > >> > >> Cc: David Miller > >> Signed-off-by: Cong Wang > >> Signed-off-by: David S. Miller > >> > >> AFAICS, it has been fixed by commit > >> 072a9c48600409d72aeb0d5b29fbb75861a06631 which is not yet in linux-pm-next. > > > > If it is present in the current Linus' tree, you can just pull this one > > and merge linux-pm-next into it. It should merge without conflicts. > > Ok, thanks. > > >> I fall into this issue because NETCONSOLE is set, disabling it allowed > >> me to go further. > >> > >> Unfortunately I am facing to some random freeze on the system which > >> seems to be related to CONFIG_NO_HZ=y and CONFIG_CPU_IDLE=y. > >> > >> Disabling one of them, make the freezes to disappear. > >> > >> Is it a known issue ? > > > > Well, there are systems having problems with this configuration, but they > > should be exceptional. What system is that? > > It is a laptop T61p with a Core 2 Duo T9500. Nothing exceptional I > believe. Maybe someone got the same issue ? Is it a regression for you?