From mboxrd@z Thu Jan  1 00:00:00 1970
From: Fengzhe Zhang <fengzhe.zhang@intel.com>
Subject: Re: [PATCH] iomem: Prevent Dom0 pci bus from allocating
	RAM as I/O space
Date: Sun, 20 Feb 2011 21:58:04 +0800
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To: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: xen-devel <xen-devel@lists.xensource.com>, "Dong,
	Eddie" <eddie.dong@intel.com>, "Li, Xin" <xin.li@intel.com>, "Jiang, Yunhong" <yunhong.jiang@intel.com>
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On 2011/2/18 23:16, Konrad Rzeszutek Wilk wrote:
> 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?
>

If dom0_mem is not used, no visible system error is observed even 
without the revert.

-Fengzhe