Re: [Xen-devel] RFC: [0/2] Remove netloop by lazy copying in netback

[Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>]

On Tue, Mar 27, 2007 at 11:08:10AM +1000, Herbert Xu wrote:
> On Tue, Mar 27, 2007 at 02:02:39AM +0100, Keir Fraser wrote:
> > 
> > Well, it could be a bit more work to change, but what does a p2m entry look
> > like for a grant mapping? The p2m table should be a very convenient place to
> > have typed entries, with one of those types being grant-mapping, and
> > including the maptrack handle. The MFN can be derived from the maptrack
> > handle where that is required. This would then conveniently be enough
> > information to perform implicit unmaps (the lack of support of which is an
> > annoying limitation for non-auto-translate guests which it would be really
> > nice to avoid for auto-translate guests, particularly since it ought to be
> > not really all that hard afaics).
> 
> OK I'll look into this for the auto-translated case.

Hmm where are we going to get space to store the grant handle?
The p2m table itself is just a page table.

Cheers,
-- 
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Email: Herbert Xu ~{PmV>HI~} <herbert@xxxxxxxxxxxxxxxxxxx>
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