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

On 27/3/07 11:06, "Herbert Xu" <herbert@xxxxxxxxxxxxxxxxxxx> wrote:

> Sorry I don't get it.  What if we called it a page table operation,
> would that make it better :) In other words, what exactly is wrong
> with having such an operation?

The grant-table code is pretty complicated and a harbour for bugs. So I
prefer to keep it as small and simple as possible. I'm not sure the
comparison with page-table operations is a good one -- the Xen PV interface
for pagetable updates doesn't include anything as special-case as the things
we are currently considering for grant tables.

> As for a place to store the info, we can just store the real MFN in
> the p2m table but mark it as not present.

We can't do that where there is no p2m. I suppose we could make this
operation specific to auto-translate guests.

 -- Keir

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