[PATCH v4 5/7] add profile information for invalidated page reclaim

[Minchan Kim]

This patch adds profile information about invalidated page reclaim.
It's just for profiling for test so it would be discard when the series
are merged.

Signed-off-by: Minchan Kim <minchan.kim@xxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Cc: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Cc: Wu Fengguang <fengguang.wu@xxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Nick Piggin <npiggin@xxxxxxxxx>
Cc: Mel Gorman <mel@xxxxxxxxx>
---
 include/linux/vmstat.h |    4 ++--
 mm/swap.c              |    3 +++
 mm/vmstat.c            |    3 +++
 3 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h
index 833e676..c38ad95 100644
--- a/include/linux/vmstat.h
+++ b/include/linux/vmstat.h
@@ -30,8 +30,8 @@
 
 enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT,
 		FOR_ALL_ZONES(PGALLOC),
-		PGFREE, PGACTIVATE, PGDEACTIVATE,
-		PGFAULT, PGMAJFAULT,
+		PGFREE, PGACTIVATE, PGDEACTIVATE, PGINVALIDATE,
+		PGRECLAIM, PGFAULT, PGMAJFAULT,
 		FOR_ALL_ZONES(PGREFILL),
 		FOR_ALL_ZONES(PGSTEAL),
 		FOR_ALL_ZONES(PGSCAN_KSWAPD),
diff --git a/mm/swap.c b/mm/swap.c
index 0f23998..2f21e6e 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -317,6 +317,7 @@ static void lru_deactivate(struct page *page, struct zone *zone)
 		 * is _really_ small and  it's non-critical problem.
 		 */
 		SetPageReclaim(page);
+		__count_vm_event(PGRECLAIM);
 	} else {
 		/*
 		 * The page's writeback ends up during pagevec
@@ -328,6 +329,8 @@ static void lru_deactivate(struct page *page, struct zone *zone)
 
 	if (active)
 		__count_vm_event(PGDEACTIVATE);
+
+	__count_vm_event(PGINVALIDATE);
 	update_page_reclaim_stat(zone, page, file, 0);
 }
 
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 3555636..ef6102d 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -818,6 +818,9 @@ static const char * const vmstat_text[] = {
 	"pgactivate",
 	"pgdeactivate",
 
+	"pginvalidate",
+	"pgreclaim",
+
 	"pgfault",
 	"pgmajfault",
 
-- 
1.7.0.4

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