vmscan: cleanup the scan batching code

The vmscan batching logic is twisting.  Move it into a standalone function
nr_scan_try_batch() and document it.  No behavior change.

Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Acked-by: Rik van Riel <riel@redhat.com>
Cc: Nick Piggin <npiggin@suse.de>
Cc: Christoph Lameter <cl@linux-foundation.org>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 4 insertions, 4 deletions

diff --git a/mm/vmstat.c b/mm/vmstat.c
index 415110772c73..84c055556911 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -718,10 +718,10 @@ static void zoneinfo_show_print(struct seq_file *m, pg_data_t *pgdat,
                    low_wmark_pages(zone),
                    high_wmark_pages(zone),
                    zone->pages_scanned,
-                   zone->lru[LRU_ACTIVE_ANON].nr_scan,
-                   zone->lru[LRU_INACTIVE_ANON].nr_scan,
-                   zone->lru[LRU_ACTIVE_FILE].nr_scan,
-                   zone->lru[LRU_INACTIVE_FILE].nr_scan,
+                   zone->lru[LRU_ACTIVE_ANON].nr_saved_scan,
+                   zone->lru[LRU_INACTIVE_ANON].nr_saved_scan,
+                   zone->lru[LRU_ACTIVE_FILE].nr_saved_scan,
+                   zone->lru[LRU_INACTIVE_FILE].nr_saved_scan,
                    zone->spanned_pages,
                    zone->present_pages);