On Fri 05-12-14 16:08:16, Minchan Kim wrote: [...] > From cfa212d4fb307ae772b08cf564cab7e6adb8f4fc Mon Sep 17 00:00:00 2001 > From: Minchan Kim <minchan@xxxxxxxxxx> > Date: Mon, 1 Dec 2014 08:53:55 +0900 > Subject: [PATCH] madvise.2: Document MADV_FREE > > Signed-off-by: Minchan Kim <minchan@xxxxxxxxxx> Reviewed-by: Michal Hocko <mhocko@xxxxxxx> 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 > -- > To unsubscribe from this list: send the line "unsubscribe linux-api" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- Michal Hocko SUSE Labs -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
