On Tue, 2006-11-21 at 23:43 +0000, Mel Gorman wrote:
> On Tue, 21 Nov 2006, Christoph Lameter wrote:
> > Are GFP_HIGHUSER allocations always movable? It would reduce the size of
> > the patch if this would be added to GFP_HIGHUSER.
>
> No, they aren't. Page tables allocated with HIGHPTE are currently not
> movable for example. A number of drivers (infiniband for example) also use
> __GFP_HIGHMEM that are not movable.
I think Christoph was saying that it might reduce the size of the patch
to include it by _default_. You could always go to the
weird^Wspecialized users and mask the bits back off.
We probably also need to start getting a nice list of those users which
are HIGH but not MOVABLE. This would provide that by default, I think.
-- Dave
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