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From: Jesse Barnes <jbarnes@virtuousgeek.org>
To: linux-pci@atrey.karlin.mff.cuni.cz
Subject: Re: PCI MSI breaks when booting with nosmp
Date: Mon, 21 Apr 2008 10:43:10 -0700
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Cc: Jean Delvare <jdelvare@suse.de>, LKML <linux-kernel@vger.kernel.org>,
       Pavel Machek <pavel@ucw.cz>, Tejun Heo <htejun@gmail.com>,
       Tom Long Nguyen <tom.l.nguyen@intel.com>,
       Randy Dunlap <rdunlap@xenotime.net>, Jeff Garzik <jgarzik@pobox.com>
References: <200804172140.02311.jdelvare@suse.de> <200804171308.37328.jbarnes@virtuousgeek.org> <200804172225.14373.jdelvare@suse.de>
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On Thursday, April 17, 2008 1:25 pm Jean Delvare wrote:
> Le jeudi 17 avril 2008, Jesse Barnes a écrit :
> > On Thursday, April 17, 2008 12:40 pm Jean Delvare wrote:
> > > Booting with "nosmp" doesn't work on my Thinkpad T60p laptop while
> > > booting with "nosmp pci=nomsi" works. Forcibly disabling PCI MSI
> > > when booting with nosmp fixes the problem. I'm not sure if it's the
> > > correct fix though.
> >
> > Seems like this is fixing the symptom, not the cause.  I'll see if I can
> > reproduce locally...
>
> If it helps, the device that breaks is:
> 00:1f.2 SATA controller: Intel Corporation 82801GBM/GHM (ICH7 Family) SATA
> AHCI Controller (rev 02) i.e. SATA hard disk drive on an Intel ICH7
> controller.

Ok, I see this too on my desktop machine.  It looks like we're not getting 
interrupts setup correctly in the nosmp case.  Still digging through to see 
why though...

Jesse