On Tue, Oct 21, 2014 at 11:35:48AM +0300, Kirill A. Shutemov wrote:

pud_huge() too. Or filter out VM_HUGETLB altogether.

Oh right, giga pages, all this new fangled stuff ;-) But yes, I suppose
we can exclude hugetlbfs, we should arguably make the thp muck work
though.

BTW, what keeps mm_struct around? It seems we don't take reference during
page fault.

Last I checked tasks have a ref on their own mm, and seeing this all
runs in task context, the mm should be pretty safe.

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