linux-kernel - [PATCH for mmotm 3/5] add Mapped(SwapBacked) field to /proc/meminfo

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Message-Id: <20090611192647.6D53.A69D9226@jp.fujitsu.com>
Date:	Thu, 11 Jun 2009 19:27:18 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	linux-mm <linux-mm@...ck.org>, LKML <linux-kernel@...r.kernel.org>
Cc:	kosaki.motohiro@...fujitsu.com, Mel Gorman <mel@....ul.ie>,
	Wu Fengguang <fengguang.wu@...el.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH for mmotm 3/5] add Mapped(SwapBacked) field to /proc/meminfo

Subject: [PATCH] add Mapped(SwapBacked) field to /proc/meminfo

Now, We have NR_SWAP_BACKED_FILE_MAPPED statistics. Thus we can also
display it by /proc/meminfo.


example:

$ cat /proc/meminfo
MemTotal:       32275164 kB
MemFree:        31880212 kB
(snip)
Mapped:            28048 kB
Mapped(SwapBacked):      836 kB

Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Cc: Mel Gorman <mel@....ul.ie>
Cc: Wu Fengguang <fengguang.wu@...el.com>
---
 fs/proc/meminfo.c |    2 ++
 1 file changed, 2 insertions(+)

Index: b/fs/proc/meminfo.c
===================================================================
--- a/fs/proc/meminfo.c
+++ b/fs/proc/meminfo.c
@@ -81,6 +81,7 @@ static int meminfo_proc_show(struct seq_
 		"Writeback:      %8lu kB\n"
 		"AnonPages:      %8lu kB\n"
 		"Mapped:         %8lu kB\n"
+		"Mapped(SwapBacked): %8lu kB\n"
 		"Slab:           %8lu kB\n"
 		"SReclaimable:   %8lu kB\n"
 		"SUnreclaim:     %8lu kB\n"
@@ -124,6 +125,7 @@ static int meminfo_proc_show(struct seq_
 		K(global_page_state(NR_WRITEBACK)),
 		K(global_page_state(NR_ANON_PAGES)),
 		K(global_page_state(NR_FILE_MAPPED)),
+		K(global_page_state(NR_SWAP_BACKED_FILE_MAPPED)),
 		K(global_page_state(NR_SLAB_RECLAIMABLE) +
 				global_page_state(NR_SLAB_UNRECLAIMABLE)),
 		K(global_page_state(NR_SLAB_RECLAIMABLE)),


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