From: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
To: linux-mm@kvack.org
Cc: Andrew Morton <akpm@linux-foundation.org>,
David Rientjes <rientjes@google.com>,
Andi Kleen <andi@firstfloor.org>,
Wu Fengguang <fengguang.wu@intel.com>,
Andrea Arcangeli <aarcange@redhat.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
linux-kernel@vger.kernel.org,
Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Subject: [PATCH 4/6] pagemap: document KPF_THP and make page-types aware of it
Date: Wed, 8 Feb 2012 10:51:40 -0500 [thread overview]
Message-ID: <1328716302-16871-5-git-send-email-n-horiguchi@ah.jp.nec.com> (raw)
In-Reply-To: <1328716302-16871-1-git-send-email-n-horiguchi@ah.jp.nec.com>
page-types, which is a common user of pagemap, gets aware of thp
with this patch. This helps system admins and kernel hackers know
about how thp works.
Here is a sample output of page-types over a thp:
$ page-types -p <pid> --raw --list
voffset offset len flags
...
7f9d40200 3f8400 1 ___U_lA____Ma_bH______t____________
7f9d40201 3f8401 1ff ________________T_____t____________
flags page-count MB symbolic-flags long-symbolic-flags
0x0000000000410000 511 1 ________________T_____t____________ compound_tail,thp
0x000000000040d868 1 0 ___U_lA____Ma_bH______t____________ uptodate,lru,active,mmap,anonymous,swapbacked,compound_head,thp
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Acked-by: Wu Fengguang <fengguang.wu@intel.com>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Changes since v1:
- fix misused word
---
Documentation/vm/page-types.c | 2 ++
Documentation/vm/pagemap.txt | 4 ++++
2 files changed, 6 insertions(+), 0 deletions(-)
diff --git 3.3-rc2.orig/Documentation/vm/page-types.c 3.3-rc2/Documentation/vm/page-types.c
index 7445caa..0b13f02 100644
--- 3.3-rc2.orig/Documentation/vm/page-types.c
+++ 3.3-rc2/Documentation/vm/page-types.c
@@ -98,6 +98,7 @@
#define KPF_HWPOISON 19
#define KPF_NOPAGE 20
#define KPF_KSM 21
+#define KPF_THP 22
/* [32-] kernel hacking assistances */
#define KPF_RESERVED 32
@@ -147,6 +148,7 @@ static const char *page_flag_names[] = {
[KPF_HWPOISON] = "X:hwpoison",
[KPF_NOPAGE] = "n:nopage",
[KPF_KSM] = "x:ksm",
+ [KPF_THP] = "t:thp",
[KPF_RESERVED] = "r:reserved",
[KPF_MLOCKED] = "m:mlocked",
diff --git 3.3-rc2.orig/Documentation/vm/pagemap.txt 3.3-rc2/Documentation/vm/pagemap.txt
index df09b96..4600cbe 100644
--- 3.3-rc2.orig/Documentation/vm/pagemap.txt
+++ 3.3-rc2/Documentation/vm/pagemap.txt
@@ -60,6 +60,7 @@ There are three components to pagemap:
19. HWPOISON
20. NOPAGE
21. KSM
+ 22. THP
Short descriptions to the page flags:
@@ -97,6 +98,9 @@ Short descriptions to the page flags:
21. KSM
identical memory pages dynamically shared between one or more processes
+22. THP
+ contiguous pages which construct transparent hugepages
+
[IO related page flags]
1. ERROR IO error occurred
3. UPTODATE page has up-to-date data
--
1.7.7.6
next prev parent reply other threads:[~2012-02-08 15:53 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-08 15:51 [PATCH 0/6 v5] pagemap handles transparent hugepage Naoya Horiguchi
2012-02-08 15:51 ` [PATCH 1/6] pagemap: avoid splitting thp when reading /proc/pid/pagemap Naoya Horiguchi
2012-02-08 15:51 ` [PATCH 2/6] thp: optimize away unnecessary page table locking Naoya Horiguchi
2012-02-09 2:19 ` KAMEZAWA Hiroyuki
2012-02-19 21:21 ` Hugh Dickins
2012-02-20 7:28 ` Naoya Horiguchi
2012-02-20 11:38 ` Hugh Dickins
2012-02-20 11:54 ` Jiri Slaby
2012-02-08 15:51 ` [PATCH 3/6] pagemap: export KPF_THP Naoya Horiguchi
2012-02-08 15:51 ` Naoya Horiguchi [this message]
2012-02-08 15:51 ` [PATCH 5/6] introduce pmd_to_pte_t() Naoya Horiguchi
2012-02-09 2:24 ` KAMEZAWA Hiroyuki
2012-02-16 0:54 ` Andrew Morton
2012-02-16 9:02 ` Naoya Horiguchi
2012-02-08 15:51 ` [PATCH 6/6] pagemap: introduce data structure for pagemap entry Naoya Horiguchi
2012-02-09 2:29 ` KAMEZAWA Hiroyuki
2012-02-09 4:16 ` Naoya Horiguchi
2012-02-10 0:27 ` Andrew Morton
2012-02-10 0:59 ` KAMEZAWA Hiroyuki
-- strict thread matches above, loose matches on Subject: below --
2012-01-27 23:02 [PATCH 0/6 v4] pagemap handles transparent hugepage Naoya Horiguchi
2012-01-27 23:02 ` [PATCH 4/6] pagemap: document KPF_THP and make page-types aware of it Naoya Horiguchi
2012-01-12 19:34 [PATCH 0/6 v3] pagemap handles transparent hugepage Naoya Horiguchi
2012-01-12 19:34 ` [PATCH 4/6] pagemap: document KPF_THP and make page-types aware of it Naoya Horiguchi
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