Commit a1bbb5ec authored by Wu Fengguang's avatar Wu Fengguang Committed by Linus Torvalds
Browse files

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: default avatarWu Fengguang <fengguang.wu@intel.com>
Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Cc: Izik Eidus <ieidus@redhat.com>
Acked-by: default avatarChris Wright <chrisw@redhat.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 253fb02d
......@@ -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",
......
......@@ -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
......
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