Re: [Xen-devel] [PATCH 2/2] x86/xen: during early setup, only 1:1 map the ISA region

[David Vrabel <david.vrabel@xxxxxxxxxx>]

On 16/08/13 16:25, Konrad Rzeszutek Wilk wrote:
> On Fri, Aug 16, 2013 at 03:42:56PM +0100, David Vrabel wrote:
>> From: David Vrabel <david.vrabel@xxxxxxxxxx>
>>
>> During early setup, when the reserved regions and MMIO holes are being
>> setup as 1:1 in the p2m, clear any mappings instead of making them 1:1
>> (execept for the ISA region which is expected to be mapped).
>>
>> This reverts a change in behaviour introduced in 3.5 by 83d51ab473dd
>> (xen/setup: update VA mapping when releasing memory during setup).
> 
> So it won't cause the original issues to reappear which is that we
> get this
> 
>     (XEN) page_alloc.c:1148:d0 Over-allocation for domain 0: 2097153 > 2097152
>     (XEN) memory.c:133:d0 Could not allocate order=0 extent: id=0 memflags=0 
> (0 of 17)
>     
> if we boot without dom0_mem_max ?

No, because the mapping is either updated or cleared.

David

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