linux-kernel - [RFC] mm:change meminfo cached calculation

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Message-ID: <35FD53F367049845BC99AC72306C23D103EDAF89E160@CNBJMBX05.corpusers.net>
Date:	Fri, 26 Dec 2014 19:56:49 +0800
From:	"Wang, Yalin" <Yalin.Wang@...ymobile.com>
To:	"'minchan@...nel.org'" <minchan@...nel.org>,
	'Konstantin Khlebnikov' <koct9i@...il.com>,
	"'Kirill A. Shutemov'" <kirill@...temov.name>,
	'Andrew Morton' <akpm@...ux-foundation.org>,
	"'linux-kernel@...r.kernel.org'" <linux-kernel@...r.kernel.org>,
	"'linux-mm@...ck.org'" <linux-mm@...ck.org>,
	"'linux-arm-kernel@...ts.infradead.org'" 
	<linux-arm-kernel@...ts.infradead.org>,
	"'n-horiguchi@...jp.nec.com'" <n-horiguchi@...jp.nec.com>,
	"'pintu.k@...sung.com'" <pintu.k@...sung.com>
Subject: [RFC] mm:change meminfo cached calculation

This patch subtract sharedram from cached,
sharedram can only be swap into swap partitions,
they should be treated as swap pages, not as cached pages.

Signed-off-by: Yalin Wang <yalin.wang@...ymobile.com>
---
 fs/proc/meminfo.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/proc/meminfo.c b/fs/proc/meminfo.c
index d3ebf2e..2b598a6 100644
--- a/fs/proc/meminfo.c
+++ b/fs/proc/meminfo.c
@@ -45,7 +45,7 @@ static int meminfo_proc_show(struct seq_file *m, void *v)
 	committed = percpu_counter_read_positive(&vm_committed_as);
 
 	cached = global_page_state(NR_FILE_PAGES) -
-			total_swapcache_pages() - i.bufferram;
+			total_swapcache_pages() - i.bufferram - i.sharedram;
 	if (cached < 0)
 		cached = 0;
 
-- 
2.1.3