From mboxrd@z Thu Jan 1 00:00:00 1970 From: 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, 06 Sep 2012 22:35:44 +0200 Message-ID: <50490920.9070204@linaro.org> References: <1343164349-28550-1-git-send-email-daniel.lezcano@linaro.org> <50485698.1070905@linaro.org> <50486B58.7000901@linaro.org> <201209062204.11288.rjw@sisk.pl> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from mail-ee0-f46.google.com ([74.125.83.46]:56545 "EHLO mail-ee0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759858Ab2IFUft (ORCPT ); Thu, 6 Sep 2012 16:35:49 -0400 Received: by eekc1 with SMTP id c1so887745eek.19 for ; Thu, 06 Sep 2012 13:35:48 -0700 (PDT) In-Reply-To: <201209062204.11288.rjw@sisk.pl> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: "Rafael J. Wysocki" 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 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/P= lumbers 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 h= angs >>> 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 wi= th >> 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() >> =20 >> napi->poll() needs IRQ enabled, so we have to re-enable IRQ befo= re >> calling it. >> =20 >> 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-p= m-next. >=20 > If it is present in the current Linus' tree, you can just pull this o= ne > 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 allow= ed >> me to go further. >> >> Unfortunately I am facing to some random freeze on the system which >> seems to be related to CONFIG_NO_HZ=3Dy and CONFIG_CPU_IDLE=3Dy. >> >> Disabling one of them, make the freezes to disappear. >> >> Is it a known issue ? >=20 > 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 ? --=20 Linaro.org =E2=94=82 Open source software for= ARM SoCs =46ollow Linaro: Facebook | Twitter | Blog -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html