Signed-off-by: Mike Rapoport <rppt@xxxxxxxxxxxxxxxxxx>
---
Documentation/vm/page_owner.txt | 34 +++++++++++++++++++++-------------
1 file changed, 21 insertions(+), 13 deletions(-)
diff --git a/Documentation/vm/page_owner.txt b/Documentation/vm/page_owner.txt
index ffff143..0ed5ab8 100644
--- a/Documentation/vm/page_owner.txt
+++ b/Documentation/vm/page_owner.txt
@@ -1,7 +1,11 @@
+.. _page_owner:
+
+==================================================
page owner: Tracking about who allocated each page
------------------------------------------------------------
+==================================================
-* Introduction
+Introduction
+============
page owner is for the tracking about who allocated each page.
It can be used to debug memory leak or to find a memory hogger.
@@ -34,13 +38,15 @@ not affect to allocation performance, especially if the static keys jump
label patching functionality is available. Following is the kernel's code
size change due to this facility.
-- Without page owner
+- Without page owner::
+
text data bss dec hex filename
- 40662 1493 644 42799 a72f mm/page_alloc.o
+ 40662 1493 644 42799 a72f mm/page_alloc.o
+
+- With page owner::
-- With page owner
text data bss dec hex filename
- 40892 1493 644 43029 a815 mm/page_alloc.o
+ 40892 1493 644 43029 a815 mm/page_alloc.o
1427 24 8 1459 5b3 mm/page_ext.o
2722 50 0 2772 ad4 mm/page_owner.o
@@ -62,21 +68,23 @@ are catched and marked, although they are mostly allocated from struct
page extension feature. Anyway, after that, no page is left in
un-tracking state.
-* Usage
+Usage
+=====
+
+1) Build user-space helper::
-1) Build user-space helper
cd tools/vm
make page_owner_sort
-2) Enable page owner
- Add "page_owner=on" to boot cmdline.
+2) Enable page owner: add "page_owner=on" to boot cmdline.
3) Do the job what you want to debug
-4) Analyze information from page owner
+4) Analyze information from page owner::
+
cat /sys/kernel/debug/page_owner > page_owner_full.txt
grep -v ^PFN page_owner_full.txt > page_owner.txt
./page_owner_sort page_owner.txt sorted_page_owner.txt
- See the result about who allocated each page
- in the sorted_page_owner.txt.
+ See the result about who allocated each page
+ in the ``sorted_page_owner.txt``.
--
2.7.4
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