From 253fb02d62571e5455eedc9e39b9d660e86a40f0 Mon Sep 17 00:00:00 2001 From: Wu Fengguang Date: Wed, 7 Oct 2009 16:32:27 -0700 Subject: pagemap: export KPF_HWPOISON This flag indicates a hardware detected memory corruption on the page. Any future access of the page data may bring down the machine. Signed-off-by: Wu Fengguang Cc: Andi Kleen Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- Documentation/vm/pagemap.txt | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'Documentation/vm/pagemap.txt') diff --git a/Documentation/vm/pagemap.txt b/Documentation/vm/pagemap.txt index 600a304a828c..2fdd84a19109 100644 --- a/Documentation/vm/pagemap.txt +++ b/Documentation/vm/pagemap.txt @@ -57,6 +57,7 @@ There are three components to pagemap: 16. COMPOUND_TAIL 16. HUGE 18. UNEVICTABLE + 19. HWPOISON 20. NOPAGE Short descriptions to the page flags: @@ -86,6 +87,9 @@ Short descriptions to the page flags: 17. HUGE this is an integral part of a HugeTLB page +19. HWPOISON + hardware detected memory corruption on this page: don't touch the data! + 20. NOPAGE no page frame exists at the requested address -- cgit v1.2.3 From a1bbb5ec39042fb762e7f4bcc634da0d87834193 Mon Sep 17 00:00:00 2001 From: Wu Fengguang Date: Wed, 7 Oct 2009 16:32:28 -0700 Subject: 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 Cc: Hugh Dickins Cc: Izik Eidus Acked-by: Chris Wright Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- Documentation/vm/page-types.c | 2 ++ Documentation/vm/pagemap.txt | 4 ++++ 2 files changed, 6 insertions(+) (limited to 'Documentation/vm/pagemap.txt') 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 -- cgit v1.2.3