This patch adds profile information about invalidated page reclaim.
It's just for profiling for test so it is never for merging.

Acked-by: Rik van Riel <redacted>
Cc: KOSAKI Motohiro <redacted>
Cc: Wu Fengguang <redacted>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Nick Piggin <redacted>
Cc: Mel Gorman <redacted>
Signed-off-by: Minchan Kim <redacted>
---
 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 0a33714..980c17b 100644
--- a/mm/swap.c
+++ b/mm/swap.c

@@ -397,6 +397,7 @@ 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

@@ -409,6 +410,8 @@ 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 0c3b504..cbe032b 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c

@@ -896,6 +896,9 @@ static const char * const vmstat_text[] = {
 	"pgactivate",
 	"pgdeactivate",
 
+	"pginvalidate",
+	"pgreclaim",
+
 	"pgfault",
 	"pgmajfault",
 

-- 
1.7.1