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

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Date:	Mon,  6 Dec 2010 02:29:13 +0900
From:	Minchan Kim <minchan.kim@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Rik van Riel <riel@...hat.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	linux-mm <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Minchan Kim <minchan.kim@...il.com>,
	Wu Fengguang <fengguang.wu@...el.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Nick Piggin <npiggin@...nel.dk>, Mel Gorman <mel@....ul.ie>
Subject: [PATCH v4 5/7] add profile information for invalidated page reclaim

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@...il.com>
Cc: Rik van Riel <riel@...hat.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Cc: Wu Fengguang <fengguang.wu@...el.com>
Cc: Johannes Weiner <hannes@...xchg.org>
Cc: Nick Piggin <npiggin@...nel.dk>
Cc: Mel Gorman <mel@....ul.ie>
---
 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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