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 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

> I now get a very large number of these at guest with passthrough start:
> (XEN) [2015-04-12 14:55:20.226] p2m.c:884:d0v0 gfn_to_mfn failed! 
> gfn=ffffffff001ed type:4


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