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Re: [Xen-devel] [PATCH] iomem: Prevent Dom0 pci bus from allocating RAM

To: Fengzhe Zhang <fengzhe.zhang@xxxxxxxxx>
Subject: Re: [Xen-devel] [PATCH] iomem: Prevent Dom0 pci bus from allocating RAM as I/O space
From: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Date: Fri, 18 Feb 2011 10:16:49 -0500
Cc: xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, "Dong, Eddie" <eddie.dong@xxxxxxxxx>, "Li, Xin" <xin.li@xxxxxxxxx>, yunhong.jiang@xxxxxxxxx
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On Thu, Feb 17, 2011 at 01:32:15PM +0800, Fengzhe Zhang wrote:
> On 2011/2/16 23:47, Konrad Rzeszutek Wilk wrote:
> >On Wed, Feb 16, 2011 at 10:20:21AM -0500, Konrad Rzeszutek Wilk wrote:
> >>On Wed, Feb 16, 2011 at 10:06:38AM -0500, Konrad Rzeszutek Wilk wrote:
> >>>On Wed, Feb 16, 2011 at 10:26:20PM +0800, Zhang, Fengzhe wrote:
> >>>>iomem: Prevent Dom0 pci bus from allocating RAM as I/O space
> >>>
> >>>Is there a bug # associated with this? Is this associated with the 
> >>>intel-agp
> >>>driver trying to ioremap the scratch page and bombing out?
> >
> >Also did you try to revert 0b56d9994ebe34df77fa156d2068ad93b7877b44 and see
> >how that works? Here is the revert attached
> >
> 
> I tried this patch and it can indeed avoid system crash.
> 

What happens if you use the revert _and_ don't use dom0_mem? Does
the machine not crash on the igb?


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