RE: 2.6.25-current-git hangs on boot unless CONFIG_CPU_IDLE=n-Apple

[Pallipadi, Venkatesh]

>-----Original Message-----
>From: Carlos R. Mafra [mailto:crmafra2@xxxxxxxxx] 
>Sent: Friday, April 04, 2008 8:52 AM
>To: Pallipadi, Venkatesh
>Cc: Ray Lee; Rafael J. Wysocki; Linux Kernel Mailing List; 
>Pallipadi@xxxxxxxxxxxx; Soeren Sonnenburg
>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@xxxxxxxxxxxxxxx 
>> >[mailto:linux-kernel-owner@xxxxxxxxxxxxxxx] 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@xxxxxxxxxxxx; 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@xxxxxxxxx> 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@xxxxxx>
>> >> >  > >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@xxxxxxxxx>
>> >> >  > >
>> >> >  >
>> >> >  > 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?

Yes. I think the patch here should have fixed the problem....
Patch : http://marc.info/?l=linux-kernel&m=120674502201007&w=4

Thanks,
Venki

>
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