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SubjectRe: Pinning ZONE_MOVABLE pages
On Mon, Nov 23, 2020 at 12:54:16PM -0500, Pavel Tatashin wrote:
> > I agree with the other emails, ZONE_MOVABLE needs to be reconciled
> > with FOLL_LONGTERM - most likely by preventing ZONE_MOVABLE pages from
> > being returned. This will need migration like CMA does and the point
> > about faulting is only an optimization to prevent fault then immediate
> > migration.
>
> That is right, as the first step we could just do fault and immediate
> migration, which is silly, but still better than what we have now.

I was looking at this CMA code lately and would love to see a
cleaner/faster implementation.

If you really understand how this works maybe it is an opportunity to
make it all work better.

Jason

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