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| author | Wu Fengguang <fengguang.wu@intel.com> | 2009-10-08 03:32:28 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-10-08 18:36:39 +0400 |
| commit | a1bbb5ec39042fb762e7f4bcc634da0d87834193 (patch) | |
| tree | 20bb538ee4b3a9fbf5e8e9d1988fed2011deffce /Documentation/vm | |
| parent | 253fb02d62571e5455eedc9e39b9d660e86a40f0 (diff) | |
| download | linux-a1bbb5ec39042fb762e7f4bcc634da0d87834193.tar.xz | |
pagemap: document KPF_KSM and show it in page-types
It indicates to the system admin that processes mapping such pages may be
eating less physical memory than the reported numbers by legacy tools.
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Cc: Izik Eidus <ieidus@redhat.com>
Acked-by: Chris Wright <chrisw@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/vm')
| -rw-r--r-- | Documentation/vm/page-types.c | 2 | ||||
| -rw-r--r-- | Documentation/vm/pagemap.txt | 4 |
2 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/vm/page-types.c b/Documentation/vm/page-types.c index 87f57228f56e..9899fa239eed 100644 --- a/Documentation/vm/page-types.c +++ b/Documentation/vm/page-types.c @@ -71,6 +71,7 @@ #define KPF_UNEVICTABLE 18 #define KPF_HWPOISON 19 #define KPF_NOPAGE 20 +#define KPF_KSM 21 /* [32-] kernel hacking assistances */ #define KPF_RESERVED 32 @@ -119,6 +120,7 @@ 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", diff --git a/Documentation/vm/pagemap.txt b/Documentation/vm/pagemap.txt index 2fdd84a19109..df09b9650a81 100644 --- a/Documentation/vm/pagemap.txt +++ b/Documentation/vm/pagemap.txt @@ -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 |