linux-kernel - Re: [PATCH] x86,pci: dmi check for mackpro 2.2 mmconf

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Message-Id: <200807221415.37576.jbarnes@virtuousgeek.org>
Date:	Tue, 22 Jul 2008 14:15:37 -0700
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	Shaohua Li <shaohua.li@...el.com>
Cc:	Jack Howarth <howarth@...mo.msbb.uc.edu>,
	Yinghai Lu <yhlu.kernel@...il.com>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86,pci: dmi check for mackpro 2.2 mmconf

On Sunday, July 20, 2008 11:49 pm Shaohua Li wrote:
> On Sat, 2008-07-19 at 15:14 -0400, Jack Howarth wrote:
> > On Sat, Jul 19, 2008 at 12:04:48PM -0700, Jesse Barnes wrote:
> > > On Saturday, July 19, 2008 11:40 am Jack Howarth wrote:
> > > > Jesse,
> > > >     It seems that MacBook Pro users aren't the only ones suffering
> > > > from PCIE_ASPM...
> > > >
> > > > http://groups.google.com/group/linux.kernel/browse_thread/thread/cc1b
> > > >8b3ef6 4e3257/dd4e427510bde7f0?lnk=raot
> > > >
> > > > I also discovered the pcie_noaspm kernel option from that thread
> > > > which allows me to boot the kernels built with PCIE_ASPM support by
> > > > disabling that feature.
> > >
> > > Yeah, that's a good data point.  Thanks.  Sounds like there may also be
> > > some ACPI interaction going on...
> > >
> > > Jesse
> >
> > Jesse,
> >    For what its worth, acpi=off alone is insufficent to inhibit the
> > kernel freezes when PCIE aspm is in use.
>
> As Jesse suggested, maybe we should blacklist all pcie pre-1.1 devices.
> please try.

Jack, did this work for you?  I'm thinking of pushing this but want to make 
sure it actually solves your problem first.

Thanks,
Jesse
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