linux-kernel - Re: Regression: Boot hang sizing transparent PCI-to-PCI bridge since after 2.6.25-r7.

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Message-ID: <20081111231531.GB7072@us.ibm.com>
Date:	Tue, 11 Nov 2008 15:15:31 -0800
From:	Gary Hade <garyhade@...ibm.com>
To:	Gary Hade <garyhade@...ibm.com>
Cc:	Jiri Slaby <jirislaby@...il.com>,
	"GARCIA DE SORIA LUCENA, JUAN JESUS" <juanj.g_soria@...pobbva.com>,
	linux-kernel@...r.kernel.org
Subject: Re: Regression: Boot hang sizing transparent PCI-to-PCI bridge
	since after 2.6.25-r7.

On Mon, Nov 10, 2008 at 09:58:16AM -0800, Gary Hade wrote:
> On Mon, Nov 10, 2008 at 11:14:11AM +0100, Jiri Slaby wrote:
> > On 11/10/2008 10:12 AM, GARCIA DE SORIA LUCENA, JUAN JESUS wrote:
> > > Hello.
> > > 
> > > Time ago I bisected a commit that was making my OKI Anima 3300 laptop
> > > hang during boot.
> > 
> > Doesn't pci=norom help in your case? There was a patch which tried to resolve
> > this issue in a different manner, but it was reverted too. This boot parameter
> > was introduced as a replacement IIRC.
> 
> As the unfortunate author of both of the reverted patches and author
> of the pci=norom patch I can confirm that Jiri is correct.  The issues
> that the patches addressed (with some unintended side effects caused
> by the reverted attempts) were PCI resource allocation failures observed
> during PCI hotplug.  We were not seeing or trying to address boot-time
> PCI resource allocation failures or hangs.

Correction.  We were not trying to address boot-time hangs but I
believe we may have been trying to address expansion ROM related
PCI resource allocation failures that we were seeing during boot
with certain PCI cards.  However, I doubt that this is relevent
to your problem.  The transparent bridge sizing removal change is
probably a red herring.

Gary

-- 
Gary Hade
System x Enablement
IBM Linux Technology Center
503-578-4503  IBM T/L: 775-4503
garyhade@...ibm.com
http://www.ibm.com/linux/ltc
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