Re: [PATCH 2/2] mlock: do not munlock pages in __do_fault()

[Hugh Dickins]

On Mon, Feb 7, 2011 at 4:47 PM, Michel Lespinasse <walken@xxxxxxxxxx> wrote:
> If the page is going to be written to, __do_page needs to break COW.
> However, the old page (before breaking COW) was never mapped mapped into
> the current pte (__do_fault is only called when the pte is not present),
> so vmscan can't have marked the old page as PageMlocked due to being
> mapped in __do_fault's VMA. Therefore, __do_fault() does not need to worry
> about clearing PageMlocked() on the old page.
>
> Signed-off-by: Michel Lespinasse <walken@xxxxxxxxxx>

Acked-by: Hugh Dickins <hughd@xxxxxxxxxx>
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