Re: [PATCH 06/10] ksm: identify PageKsm pages

[Rik van Riel]

Izik Eidus wrote:
> From: Hugh Dickins <hugh.dickins@xxxxxxxxxxxxx>
>
> KSM will need to identify its kernel merged pages unambiguously,
> and /proc/kpageflags will probably like to do so too.
>
> Since KSM will only be substituting anonymous pages, statistics are
> best preserved by making a PageKsm page a special PageAnon page:
> one with no anon_vma.
>
> But KSM then needs its own page_add_ksm_rmap() - keep it in ksm.h near
> PageKsm; and do_wp_page() must COW them, unlike singly mapped PageAnons.

Acked-by: Rik van Riel <riel@xxxxxxxxxx>

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