From: Wu Fengguang <fengguang.wu@intel.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
Hugh Dickins <hugh.dickins@tiscali.co.uk>,
Izik Eidus <ieidus@redhat.com>, Chris Wright <chrisw@redhat.com>,
Wu Fengguang <fengguang.wu@intel.com>,
Christoph Lameter <cl@linux-foundation.org>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Randy Dunlap <randy.dunlap@oracle.com>,
"Huang, Ying" <ying.huang@intel.com>,
Lin Ming <ming.m.lin@intel.com>,
Josh Triplett <josh@joshtriplett.org>,
Andi Kleen <andi@firstfloor.org>,
Nick Piggin <nickpiggin@yahoo.com.au>,
linux-mm@kvack.org
Subject: [RFC][PATCH 4/4] pagemap: document KPF_KSM and show it in page-types
Date: Wed, 02 Sep 2009 11:41:29 +0800 [thread overview]
Message-ID: <20090902035814.828959326@intel.com> (raw)
In-Reply-To: 20090902034125.718886329@intel.com
[-- Attachment #1: kpageflags-ksm.patch --]
[-- Type: text/plain, Size: 1897 bytes --]
It indicates to the system admin that processes mapping such pages may be
eating less physical memory than the reported numbers by legacy tools.
CC: Hugh Dickins <hugh.dickins@tiscali.co.uk>
CC: Izik Eidus <ieidus@redhat.com>
Acked-by: Chris Wright <chrisw@redhat.com>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
---
Documentation/vm/pagemap.txt | 4 ++++
tools/vm/page-types.c | 2 ++
2 files changed, 6 insertions(+)
--- linux-mm.orig/Documentation/vm/pagemap.txt 2009-08-31 15:02:55.000000000 +0800
+++ linux-mm/Documentation/vm/pagemap.txt 2009-09-01 15:54:36.000000000 +0800
@@ -59,6 +59,7 @@ There are three components to pagemap:
18. UNEVICTABLE
19. HWPOISON
20. NOPAGE
+ 21. KSM
Short descriptions to the page flags:
@@ -93,6 +94,9 @@ Short descriptions to the page flags:
20. NOPAGE
no page frame exists at the requested address
+21. KSM
+ identical memory pages dynamically shared between one or more processes
+
[IO related page flags]
1. ERROR IO error occurred
3. UPTODATE page has up-to-date data
--- linux-mm.orig/tools/vm/page-types.c 2009-08-31 15:00:24.000000000 +0800
+++ linux-mm/tools/vm/page-types.c 2009-09-01 15:54:16.000000000 +0800
@@ -49,6 +49,7 @@
#define KPF_UNEVICTABLE 18
#define KPF_HWPOISON 19
#define KPF_NOPAGE 20
+#define KPF_KSM 21
/* [32-] kernel hacking assistances */
#define KPF_RESERVED 32
@@ -97,6 +98,7 @@ static char *page_flag_names[] = {
[KPF_UNEVICTABLE] = "u:unevictable",
[KPF_HWPOISON] = "X:hwpoison",
[KPF_NOPAGE] = "n:nopage",
+ [KPF_KSM] = "x:ksm",
[KPF_RESERVED] = "r:reserved",
[KPF_MLOCKED] = "m:mlocked",
--
--
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prev parent reply other threads:[~2009-09-02 4:02 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-02 3:41 [RFC][PATCH 0/4] move tools in Documentation/vm/ to tools/vm/ Wu Fengguang
2009-09-02 3:41 ` [RFC][PATCH 1/4] page-types: move from " Wu Fengguang
2009-09-02 3:41 ` [RFC][PATCH 2/4] slabinfo: " Wu Fengguang
2009-09-02 4:17 ` [RFC][PATCH 2/4 v2] " Wu Fengguang
2009-09-02 18:04 ` Christoph Lameter
2009-09-02 3:41 ` [RFC][PATCH 3/4] pagemap: export KPF_HWPOISON Wu Fengguang
2009-09-02 3:41 ` Wu Fengguang [this message]
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