linux-kernel - Re: [PATCH] x86,pci: detect end_bus_number according to acpi/e820 reserved

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Message-Id: <200807181542.42670.jbarnes@virtuousgeek.org>
Date:	Fri, 18 Jul 2008 15:42:42 -0700
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	"Yinghai Lu" <yhlu.kernel@...il.com>
Cc:	"Jack Howarth" <howarth@...mo.msbb.uc.edu>,
	"Ingo Molnar" <mingo@...e.hu>,
	"Thomas Gleixner" <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>, linux-kernel@...r.kernel.org,
	Shaohua Li <shaohua.li@...el.com>
Subject: Re: [PATCH] x86,pci: detect end_bus_number according to acpi/e820 reserved

On Friday, July 18, 2008 3:27 pm Yinghai Lu wrote:
> On Fri, Jul 18, 2008 at 2:48 PM, Jack Howarth <howarth@...mo.msbb.uc.edu> 
wrote:
> > YH,
> >  I'll test the new patch shortly. When I do, I'll put back in
> > your debug patches to try to get a complete log with pci=verbose
> > and initcall_debug with PCIEASPM disabled.
>
> tip tree has the two debug patches.
>
> > Hopefully the probing
> > is done in the same general fashion with and without PCIEASPM so
> > we can deduce what exactly is being probed when my MacBook Pro
> > freezes during boot with PCIEASPM enabled. I consider the fact
> > that booting 2.6.26 always freezes the kernel when PCIEASPM
> > is enabled to be the more serious bug (since once Fedora ships
> > 2.6.26 kernels I'll be stuck always building my own).
>
> another laptop : Acer ... suffer this problem too with ASPM...

Yeah, looks like we'll have to be more conservative about enabling ASPM.  
Maybe a whitelist approach would be better...

Jesse
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