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 <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>
Signed-off-by: Minchan Kim <minchan.kim@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 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
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