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

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Date:	Fri, 4 Apr 2008 12:51:56 -0300
From:	"Carlos R. Mafra" <crmafra2@...il.com>
To:	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>
Cc:	Ray Lee <ray-lk@...rabbit.org>, "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

On Fri  4.Apr'08 at  7:25:34 -0700, Pallipadi, Venkatesh wrote:
>  
> 
> >-----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?

I've just updated to latest git, but it may take some time for it 
to happen again (the first 3 boots were okay). Last time it happened
with 2.6.25-rc7-00149-gaf8be4e (I checked now). 

Do you have reasons to believe this issue was fixed since then?
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