Re: [RFC][PATCH] mm: fix page_mkclean() vs non-linear vmas

[Miklos Szeredi]

> However this still leaves the non-linear reclaim (Nick pointed it out as
> a potential DoS and other people have corroborated this). I have no idea
> on that to do about that.

OK, but that is a completely different problem, not affecting
page_mkclean() or msync().

And it doesn't sound too hard to solve: when current algorithm doesn't
seem to be making progress, then it will have to be done the hard way,
searching for for all nonlinear ptes of a page to unmap.

Miklos
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