The patch titled
Subject: mm, vmscan: consider isolated pages in zone_reclaimable_pages
has been added to the -mm tree. Its filename is
mm-vmscan-consider-isolated-pages-in-zone_reclaimable_pages.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-vmscan-consider-isolated-pages-in-zone_reclaimable_pages.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-vmscan-consider-isolated-pages-in-zone_reclaimable_pages.patch
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------------------------------------------------------
From: Michal Hocko <mhocko@xxxxxxxx>
Subject: mm, vmscan: consider isolated pages in zone_reclaimable_pages
zone_reclaimable_pages counts how many pages are reclaimable in the given
zone. This currently includes all pages on file lrus and anon lrus if
there is an available swap storage. We do not consider
NR_ISOLATED_{ANON,FILE} counters though which is not correct because these
counters reflect temporarily isolated pages which are still reclaimable
because they either get back to their LRU or get freed either by the page
reclaim or page migration.
The number of these pages might be sufficiently high to confuse users of
zone_reclaimable_pages (e.g. mbind can migrate large ranges of memory at
once).
Signed-off-by: Michal Hocko <mhocko@xxxxxxxx>
Suggested-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Reviewed-by: Vladimir Davydov <vdavydov@xxxxxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/vmscan.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff -puN mm/vmscan.c~mm-vmscan-consider-isolated-pages-in-zone_reclaimable_pages mm/vmscan.c
--- a/mm/vmscan.c~mm-vmscan-consider-isolated-pages-in-zone_reclaimable_pages
+++ a/mm/vmscan.c
@@ -197,11 +197,13 @@ static unsigned long zone_reclaimable_pa
unsigned long nr;
nr = zone_page_state(zone, NR_ACTIVE_FILE) +
- zone_page_state(zone, NR_INACTIVE_FILE);
+ zone_page_state(zone, NR_INACTIVE_FILE) +
+ zone_page_state(zone, NR_ISOLATED_FILE);
if (get_nr_swap_pages() > 0)
nr += zone_page_state(zone, NR_ACTIVE_ANON) +
- zone_page_state(zone, NR_INACTIVE_ANON);
+ zone_page_state(zone, NR_INACTIVE_ANON) +
+ zone_page_state(zone, NR_ISOLATED_ANON);
return nr;
}
_
Patches currently in -mm which might be from mhocko@xxxxxxxx are
mm-get-rid-of-__alloc_pages_high_priority.patch
mm-do-not-loop-over-alloc_no_watermarks-without-triggering-reclaim.patch
mm-vmscan-consider-isolated-pages-in-zone_reclaimable_pages.patch
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