From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dmitry Artamonow Subject: Re: R: [Bug #14886] Asus P2B-DS not detected as SMP moterboard Date: Tue, 26 Jan 2010 18:53:30 +0300 Message-ID: <20100126155330.GA4231@rainbow> References: <5550914.425471263201351807.JavaMail.defaultUser@defaultHost> <201001112040.45514.rjw@sisk.pl> Mime-Version: 1.0 Return-path: Content-Disposition: inline In-Reply-To: <201001112040.45514.rjw-KKrjLPT3xs0@public.gmane.org> Sender: kernel-testers-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-ID: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Linux Kernel Mailing List Cc: "flinco-VGgt2q2+T+FeoWH0uzbU5w@public.gmane.org" , "Rafael J. Wysocki" , Kernel Testers List , Arkadiusz Miskiewicz , "H. Peter Anvin" , Andrew Morton , Feng Tang , Len Brown On 20:40 Mon 11 Jan , Rafael J. Wysocki wrote: > On Monday 11 January 2010, flinco-VGgt2q2+T+FeoWH0uzbU5w@public.gmane.org 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 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 Signed-off-by: Len Brown --------------------------------------------------------------------------- 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