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

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Wed, 4 Jun 2014, David Vrabel wrote:
> 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).

That is a bit too concise.
Does that mean you are not going to fix the mfn to pfn conversion
problem and instead change the common code implementation of
get_user_pages?

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