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    SubjectRe: [PATCH v17 1/7] mm: support madvise(MADV_FREE)
    On Fri 05-12-14 16:08:16, Minchan Kim wrote:
    [...]
    > From cfa212d4fb307ae772b08cf564cab7e6adb8f4fc Mon Sep 17 00:00:00 2001
    > From: Minchan Kim <minchan@kernel.org>
    > Date: Mon, 1 Dec 2014 08:53:55 +0900
    > Subject: [PATCH] madvise.2: Document MADV_FREE
    >
    > Signed-off-by: Minchan Kim <minchan@kernel.org>

    Reviewed-by: Michal Hocko <mhocko@suse.cz>

    Thanks!

    > ---
    > man2/madvise.2 | 12 ++++++++++++
    > 1 file changed, 12 insertions(+)
    >
    > diff --git a/man2/madvise.2 b/man2/madvise.2
    > index 032ead7..fc1aaca 100644
    > --- a/man2/madvise.2
    > +++ b/man2/madvise.2
    > @@ -265,6 +265,18 @@ file (see
    > .BR MADV_DODUMP " (since Linux 3.4)"
    > Undo the effect of an earlier
    > .BR MADV_DONTDUMP .
    > +.TP
    > +.BR MADV_FREE " (since Linux 3.19)"
    > +Tell the kernel that contents in the specified address range are no
    > +longer important and the range will be overwritten. When there is
    > +demand for memory, the system will free pages associated with the
    > +specified address range. In this instance, the next time a page in the
    > +address range is referenced, it will contain all zeroes. Otherwise,
    > +it will contain the data that was there prior to the MADV_FREE call.
    > +References made to the address range will not make the system read
    > +from backing store (swap space) until the page is modified again.
    > +It works only with private anonymous pages (see
    > +.BR mmap (2)).
    > .SH RETURN VALUE
    > On success
    > .BR madvise ()
    > --
    > 2.0.0
    >
    > --
    > Kind regards,
    > Minchan Kim
    > --
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    --
    Michal Hocko
    SUSE Labs


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