Re: [Xen-devel] [Hackathon] Linux session notes

[David Vrabel <david.vrabel@xxxxxxxxxx>]

On 04/06/14 12:11, Stefano Stabellini wrote:
> On Mon, 2 Jun 2014, David Vrabel wrote:
>> - Fixing m2p override.  Mapping the same MFN (by two grant refs or the
>>   same) two or more times means get_user_pages() cannot find the right
>>   page() since m2p override is many-to-one.
> 
> Did anybody proposed any ways to fix this issue?
> We have the same problem on ARM in p2m.c and I cannot see any way to
> solve the issue without slowing down the mfn to pfn conversion too much.

I was planning to add an array of pages to the vma and use this in
get_user_pages() (instead of the page table walk).

David

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