Re: [Xen-devel] Dom0 linux 4.0 + devel/for-linus-4.1 branch: p2m.c:884:d0v0 gfn_to_mfn failed! gfn=ffffffff001ed type:4

[David Vrabel <david.vrabel@xxxxxxxxxx>]

On 13/04/15 13:14, Sander Eikelenboom wrote:
> 
> Monday, April 13, 2015, 2:07:02 PM, you wrote:
> 
>> On 13/04/15 12:21, Sander Eikelenboom wrote:
>>>
>>> Monday, April 13, 2015, 11:50:51 AM, you wrote:
>>>
>>>> On 13/04/15 10:39, Sander Eikelenboom wrote:
>>>>> Hi David,
>>>>>
>>>>> I seem to have spotted some trouble with a 4.0 dom0 kernel with the 
>>>>> devel/for-linus-4.1 branch pulled on top.
>>>>>
>>>>> Does this remind you of any specific commits in the devel/for-linus-4.1 
>>>>> branch that could
>>>>> likely be involved that i could try to revert ?
>>>
>>>> Yes.  This will probably be 4e8c0c8c4bf3a (xen/privcmd: improve
>>>> performance of MMAPBATCH_V2) which makes the kernel try harder to map
>>>> all GFNs instead of failing on the first one.
>>>
>>>> I think this is qemu incorrectly trying to map GFNs.
>>>
>>>> David
>>>
>>> Reverted that specific one, but still get those messages.
> 
>> You'll have to bisect it then.  Because I don't see any other relevant
>> commits in devel/for-linus-4.1
> 
>> David
> 
> Ok .. hmm first candidate of the bisect also looks interessting:
> [628c28eefd6f2cef03b212081b466ae43fd093a3] xen: unify foreign GFN map/unmap 
> for auto-xlated physmap guests

Unless your dom0 is PVH, no.

David

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