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SubjectRe: [PATCH] pagemap: document KPF_KSM and show it in page-types
On Mon, 31 Aug 2009 15:17:02 +0800 Wu Fengguang wrote:

> 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: Chris Wright <chrisw@redhat.com>
> CC: Izik Eidus <ieidus@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 2009-08-31 15:05:02.000000000 +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 dynamicly shared between one or more processes

dynamically

> +
> [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 2009-08-31 15:02:10.000000000 +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",


---
~Randy
*** Remember to use Documentation/SubmitChecklist when testing your code ***

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