On Fri, 24 Nov 2006, Christoph Lameter wrote:
>
> So please do not require movable pages to be user allocations.
I don't think you read the whole sentence I wrote.
Go back: USER just means "it it can fail much more eagerly". It really has
nothing to do with user-mode per se. It's just not so core that the kernel
cannot handle allocation failures, so it doesn't get to retry the
allocation so eagerly.
THAT is why "movable" is almost guaranteed to also imply USER. Not because
it's not a "kernel" allocation. After all, _all_ page allocations are
kernel allocations, it's just that some are more likely to be associated
with direct user requests, and some are more internal.
Linus
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