linux-kernel - RE: 2.6.25-current-git hangs on boot unless CONFIG_CPU

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Date:	Fri, 4 Apr 2008 07:25:34 -0700
From:	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>
To:	"Carlos R. Mafra" <crmafra2@...il.com>,
	"Ray Lee" <ray-lk@...rabbit.org>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
	<Pallipadi@...e.sisk.pl>, "Soeren Sonnenburg" <kernel@....de>
Subject: RE: 2.6.25-current-git hangs on boot unless CONFIG_CPU_IDLE=n -Apple

 

>-----Original Message-----
>From: linux-kernel-owner@...r.kernel.org 
>[mailto:linux-kernel-owner@...r.kernel.org] On Behalf Of 
>Carlos R. Mafra
>Sent: Friday, April 04, 2008 4:48 AM
>To: Ray Lee
>Cc: Pallipadi, Venkatesh; Rafael J. Wysocki; Linux Kernel 
>Mailing List; Pallipadi@...e.sisk.pl; Soeren Sonnenburg
>Subject: Re: 2.6.25-current-git hangs on boot unless 
>CONFIG_CPU_IDLE=n -Apple
>
>On Thu  3.Apr'08 at 20:15:02 -0700, Ray Lee wrote:
>> On Thu, Apr 3, 2008 at 6:10 PM, Carlos R. Mafra 
><crmafra2@...il.com> wrote:
>> > On Thu  3.Apr'08 at 17:14:22 -0700, Pallipadi, Venkatesh wrote:
>> >  > >The following report is on the current list of known 
>regressions
>> >  > >from 2.6.24.  Please verify if the issue is still 
>present in the
>> >  > >mainline.
>> >  > >
>> >  > >
>> >  > >Bug-Entry    : http://bugzilla.kernel.org/show_bug.cgi?id=10093
>> >  > >Subject              : 2.6.25-current-git hangs on boot
>> >  > >unless CONFIG_CPU_IDLE=n - Apple
>> >  > >Submitter    : Soeren Sonnenburg <kernel@....de>
>> >  > >Date         : 2008-02-23 18:55 (41 days old)
>> >  > >References   : http://lkml.org/lkml/2008/2/23/263
>> >  > >
>> >  > >http://marc.info/?l=linux-acpi&amp;m=120387537018467&amp;w=4
>> >  > >Handled-By   : Pallipadi, Venkatesh 
><venkatesh.pallipadi@...el.com>
>> >  > >
>> >  >
>> >  > Last comment I saw from Soeren says it does not really 
>hang. It waits
>> >  > for 5-10 seconds sometimes before continuing. We are 
>still trying to
>> >  > narrow this down with max_cstate etc..
>> >
>> >  I should say that my laptop (Vaio) _hangs_ at boot (less 
>than 10% of boots)
>> >  and this is the last message I see:
>> >
>> >  "ACPI: Processor [CPU1] (supports 8 throttling states)"
>> >
>> >  and it stays there "forever" (more than 1 or 2 minutes at least).
>> >
>> >  I am not using my laptop too much these days, and I thought this
>> >  bug had been solved because it didn't hang for the last week (but
>> >  I boot it once per day), however it hang last night (using some
>> >  post 2.6.25-rc7 kernel)
>> >
>> >  I have pictures of the screen while showing this last 
>message at boot,
>> >  should I post it somewhere or that is not necessary?.
>> 
>> If the sysrq key still works when that happens, try to do a sysrq-t,
>> s, b to generate a trace, sync the filesystem, and reboot. 
>If anything
>> made it to the logs, please post it.
>
>Sysrq keys don't work when it hangs, I have to push the power button.
>
>Another thing to notice is that when it happens, it usually happens
>more times in a row (like 3 times). And then it can take many boots to
>happen again.
>
>I've uploaded the picture where it hangs, it is in the very beginning
>of the boot process:
>
>http://www.ift.unesp.br/users/crmafra/dsc04673.jpg


Can you try the latest git and see whether this still is a problem?

Thanks,
Venki
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