The patch titled
Subject: tools/vm/page_owner_sort.c: filter out unneeded line
has been added to the -mm tree. Its filename is
tools-vm-page_owner_sort-filter-out-unneeded-line.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/tools-vm-page_owner_sort-filter-out-unneeded-line.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/tools-vm-page_owner_sort-filter-out-unneeded-line.patch
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------------------------------------------------------
From: Changhee Han <ch0.han@xxxxxxx>
Subject: tools/vm/page_owner_sort.c: filter out unneeded line
To see a sorted result from page_owner, there must be a tiresome
preprocessing step before running page_owner_sort. This patch simply
filters out lines which start with "PFN" while reading the page owner
report.
Link: http://lkml.kernel.org/r/20200429052940.16968-1-ch0.han@xxxxxxx
Signed-off-by: Changhee Han <ch0.han@xxxxxxx>
Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Cc: Jonathan Corbet <corbet@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Documentation/vm/page_owner.rst | 3 +--
tools/vm/page_owner_sort.c | 5 +++--
2 files changed, 4 insertions(+), 4 deletions(-)
--- a/Documentation/vm/page_owner.rst~tools-vm-page_owner_sort-filter-out-unneeded-line
+++ a/Documentation/vm/page_owner.rst
@@ -83,8 +83,7 @@ Usage
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
+ ./page_owner_sort page_owner_full.txt sorted_page_owner.txt
See the result about who allocated each page
in the ``sorted_page_owner.txt``.
--- a/tools/vm/page_owner_sort.c~tools-vm-page_owner_sort-filter-out-unneeded-line
+++ a/tools/vm/page_owner_sort.c
@@ -4,8 +4,7 @@
*
* Example use:
* 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
+ * ./page_owner_sort page_owner_full.txt sorted_page_owner.txt
*
* See Documentation/vm/page_owner.rst
*/
@@ -38,6 +37,8 @@ int read_block(char *buf, int buf_size,
while (buf_end - curr > 1 && fgets(curr, buf_end - curr, fin)) {
if (*curr == '\n') /* empty line */
return curr - buf;
+ if (!strncmp(curr, "PFN", 3))
+ continue;
curr += strlen(curr);
}
_
Patches currently in -mm which might be from ch0.han@xxxxxxx are
tools-vm-page_owner_sort-filter-out-unneeded-line.patch
