mm: fix up the vmscan stat in vmstat
The "pgsteal" stat is confusing because it counts both direct reclaim as
well as background reclaim. However, we have "kswapd_steal" which also
counts background reclaim value.
This patch fixes it and also makes it match the existng "pgscan_" stats.
Test:
pgsteal_kswapd_dma32 447623
pgsteal_kswapd_normal 42272677
pgsteal_kswapd_movable 0
pgsteal_direct_dma32 2801
pgsteal_direct_normal 44353270
pgsteal_direct_movable 0
Signed-off-by: Ying Han <yinghan@google.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Mel Gorman <mel@csn.ul.ie>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Hillf Danton <dhillf@gmail.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Dan Magenheimer <dan.magenheimer@oracle.com>
Reviewed-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 1a51868..33dc256 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1568,9 +1568,14 @@
reclaim_stat->recent_scanned[0] += nr_anon;
reclaim_stat->recent_scanned[1] += nr_file;
- if (current_is_kswapd())
- __count_vm_events(KSWAPD_STEAL, nr_reclaimed);
- __count_zone_vm_events(PGSTEAL, zone, nr_reclaimed);
+ if (global_reclaim(sc)) {
+ if (current_is_kswapd())
+ __count_zone_vm_events(PGSTEAL_KSWAPD, zone,
+ nr_reclaimed);
+ else
+ __count_zone_vm_events(PGSTEAL_DIRECT, zone,
+ nr_reclaimed);
+ }
putback_inactive_pages(mz, &page_list);