[PATCH 1/2] ensure we count pages transitioning inactive via clear_active_flags

[Andy Whitcroft]

We are transitioning pages from active to inactive in
clear_active_flags, those need counting as PGDEACTIVATE vm events.

Signed-off-by: Andy Whitcroft <apw@xxxxxxxxxxxx>
Acked-by: Mel Gorman <mel@xxxxxxxxx>
---
diff --git a/mm/vmscan.c b/mm/vmscan.c
index d419e10..99ec7fa 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -777,6 +777,7 @@ static unsigned long shrink_inactive_list(unsigned long max_scan,
 			     (sc->order > PAGE_ALLOC_COSTLY_ORDER)?
 					     ISOLATE_BOTH : ISOLATE_INACTIVE);
 		nr_active = clear_active_flags(&page_list);
+		__count_vm_events(PGDEACTIVATE, nr_active);
 
 		__mod_zone_page_state(zone, NR_ACTIVE, -nr_active);
 		__mod_zone_page_state(zone, NR_INACTIVE,
-
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