Re: [RFC] Track mlock()ed pages

[Nick Piggin]

Christoph Lameter wrote:
> Add NR_MLOCK
>
> Track mlocked pages via a ZVC

I think it is not quite right. You are tracking the number of ptes
that point to mlocked pages, which can be >= the actual number of pages.

Also, page_add_anon_rmap still needs to be balanced with page_remove_rmap.

I can't think of an easy way to do this without per-page state. ie.
another page flag.

> Signed-off-by: Christoph Lameter <clameter@xxxxxxx>

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