On Sun, 16 Sep 2007, Jörn Engel wrote:
> I bet! My (false) assumption was the same as Goswin's. If non-movable
> pages are clearly seperated from movable ones and will evict movable
> ones before polluting further mixed superpages, Nick's scenario would be
> nearly infinitely impossible.
>
> Assumption doesn't reflect current code. Enforcing this assumption
> would cost extra overhead. The amount of effort to make Christoph's
> approach work reliably seems substantial and I have no idea whether it
> would be worth it.
My approach is based on Mel's code and is already working the way you
describe. Page cache allocs are marked __GFP_MOVABLE by Mel's work.
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