linux-kernel - [PATCH v5 4/4] add profile information for invalidated page

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Date:	Fri, 18 Feb 2011 00:08:22 +0900
From:	Minchan Kim <minchan.kim@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-mm <linux-mm@...ck.org>, LKML <linux-kernel@...r.kernel.org>,
	Steven Barrett <damentz@...uorix.net>,
	Ben Gamari <bgamari.foss@...il.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Rik van Riel <riel@...hat.com>, Mel Gorman <mel@....ul.ie>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Wu Fengguang <fengguang.wu@...el.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Nick Piggin <npiggin@...nel.dk>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Minchan Kim <minchan.kim@...il.com>
Subject: [PATCH v5 4/4] add profile information for invalidated page

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