linux-kernel - R: Re: R: [Bug #14886] Asus P2B-DS not detected as SMP moterboard

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Date:	Tue, 26 Jan 2010 19:42:42 +0100 (CET)
From:	"flinco@...ero.it" <flinco@...ero.it>
To:	<mad_soft@...ox.ru>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	Arkadiusz Miskiewicz <arekm@...en.pl>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Feng Tang <feng.tang@...el.com>,
	Len Brown <len.brown@...el.com>
Subject: R: Re: R: [Bug #14886] Asus P2B-DS not detected as SMP moterboard

Hi Dmitry,

I will try current git as soon as possible and I will post the results.

Many thanks and Best Regards,
Lorenzo Buzzi

>----Messaggio originale----
>Da: mad_soft@...ox.ru
>Data: 26/01/2010 16.53
>A: "Linux Kernel Mailing List"<linux-kernel@...r.kernel.org>
>Cc: "flinco@...ero.it"<flinco@...ero.it>, "Rafael J. Wysocki"<rjw@...k.pl>, 
"Kernel Testers List"<kernel-testers@...r.kernel.org>, "Arkadiusz Miskiewicz"
<arekm@...en.pl>, "H. Peter Anvin"<hpa@...or.com>, "Andrew Morton"<akpm@...ux-
foundation.org>, "Feng Tang"<feng.tang@...el.com>, "Len Brown"<len.brown@...el.
com>
>Ogg: Re: R: [Bug #14886] Asus P2B-DS not detected as SMP moterboard
>
>On 20:40 Mon 11 Jan     , Rafael J. Wysocki wrote:
>> On Monday 11 January 2010, flinco@...ero.it wrote:
>> > Tried 2.6.32.3. The issue is still present.
>> 
>> Thanks for the update.
>> 
>> Rafael
>
>(I have some troubles with registering on kernel bugzilla, so posting here,
>adding people from bug to CC: list)
>
>Hi!
>I'm also using P2B-DS and can confirm that starting with kernel 2.6.32
>SMP stopped working (and don't work still - tested with current git
>v2.6.33-rc5-238-g158c168) The issue seems to have something to do with the
>fact that ACPI is blacklisted on P2B-DS. I used to workaround this bug
>on newer kernels (>=2.6.32) by passing "acpi=force" in kernel arguments.
>Finally, yesterday I found some time to write simple automated bisection
>script and leaved it to run on machine overnight. Here's result:
>---------------------------------------------------------------------------
>e5b8fc6ac158f65598f58dba2c0d52ba3b412f52 is the first bad commit
>commit e5b8fc6ac158f65598f58dba2c0d52ba3b412f52
>Author: Len Brown <len.brown@...el.com>
>Date:   Tue Jul 7 23:22:58 2009 -0400
>
>    ACPI: check acpi_disabled in acpi_table_parse() and 
acpi_table_parse_entries()
>    
>    Allow consumers of the acpi_table_parse()/acpi_table_parse_entries() API
>    to gracefully handle the acpi_disabled=1 case via return value
>    rather than checking the global flag themselves.
>    
>    Signed-off-by: Feng Tang <feng.tang@...el.com>
>    Signed-off-by: Len Brown <len.brown@...el.com>
>---------------------------------------------------------------------------
>
>I re-checked this result and yes - reverting this commit on both 2.6.32 and
>current git (v2.6.33-rc5-238-g158c168) makes problem go away.
>
>-- 
>Best regards,
>Dmitry "MAD" Artamonow
>
>


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