linux-kernel - Re: [PATCH] PCI: boot parameter to avoid expansion ROM memory allocation

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Message-ID: <20080521172956.GA8024@us.ibm.com>
Date:	Wed, 21 May 2008 10:29:56 -0700
From:	Gary Hade <garyhade@...ibm.com>
To:	Jesse Barnes <jbarnes@...tuousgeek.org>
Cc:	Gary Hade <garyhade@...ibm.com>,
	Yinghai Lu <yhlu.kernel@...il.com>,
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org
Subject: Re: [PATCH] PCI: boot parameter to avoid expansion ROM memory allocation

On Tue, May 20, 2008 at 01:16:33PM -0700, Jesse Barnes wrote:
> On Tuesday, May 20, 2008 1:00 pm Gary Hade wrote:
> > On Tue, May 20, 2008 at 10:57:49AM -0700, Jesse Barnes wrote:
> > > On Wednesday, May 14, 2008 9:20 am Gary Hade wrote:
> > > > > Correct, not a perfect solution but better than we have right now.
> > > >
> > > > ...but don't let this comment make you think that I am not in
> > > > favor of something like you are suggesting.  I am interested
> > > > in getting the 'pci=norom' change into mainline quickly but it
> > > > is obviously less than ideal for the long term.
> > > >
> > > > Jesse, any idea how many different devices absolutely need
> > > > memory allocated for their expansion ROMs?
> > >
> > > Unless there's a ton of demand, I'd rather go with the norom option, but
> > > either way, I'd like to push the fix early in the 2.6.27 cycle rather
> > > than trying to get it into 2.6.26 at the last minute...
> >
> > This is fine.  I would also like to see the pci=norom option
> > added as-is with the thought that we may improve later by either
> > modifying pci=norom to exclude devices that need memory mapped
> > to their expansion ROMs or by adding another option (pci=minrom ?)
> > that would do the same thing.
> >
> > > So assuming you're ok with your last patch, I'll stuff it into
> > > linux-next.
> >
> > Works for me.  Thanks.
> 
> Ok, just pushed the norom patch to linux-next.  I'll test it out, but it would 
> be good if you could try the tree out out on one of the problem machines too.

Jesse, I just tried 2.6.26-rc3-next-20080521 on one of
those systems and the pci=norom option worked as expected.

Thanks,
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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