Re: [RFC] Track mlock()ed pages

Christoph Lameter
2007-01-26T06:36:21Z

On Fri, 26 Jan 2007, Nick Piggin wrote:

> 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.

Mlocked pages are not inherited. I would expect sharing to be very rare.

> Also, page_add_anon_rmap still needs to be balanced with page_remove_rmap.

Hmmm....

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

Thats what I am trying to avoid.