The patch titled
Subject: mm/damon: add DAMOS filter type YOUNG
has been added to the -mm mm-unstable branch. Its filename is
mm-damon-add-damos-filter-type-young.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-damon-add-damos-filter-type-young.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: SeongJae Park <sj@xxxxxxxxxx>
Subject: mm/damon: add DAMOS filter type YOUNG
Date: Fri, 26 Apr 2024 12:52:42 -0700
Define yet another DAMOS filter type, YOUNG. Like anon and memcg, the
type of filter will be applied to each page in the memory region, and see
if the page is accessed since the last check. Based on the 'matching'
parameter, the page is filtered out or in.
Note that this commit is adding only the type definition. The
implementation should be made by DAMON operations sets. A commit for the
implementation on 'paddr' DAMON operations set will follow.
Link: https://lkml.kernel.org/r/20240426195247.100306-4-sj@xxxxxxxxxx
Signed-off-by: SeongJae Park <sj@xxxxxxxxxx>
Tested-by: Honggyu Kim <honggyu.kim@xxxxxx>
Cc: Jonathan Corbet <corbet@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/damon.h | 2 ++
mm/damon/sysfs-schemes.c | 1 +
2 files changed, 3 insertions(+)
--- a/include/linux/damon.h~mm-damon-add-damos-filter-type-young
+++ a/include/linux/damon.h
@@ -297,6 +297,7 @@ struct damos_stat {
* enum damos_filter_type - Type of memory for &struct damos_filter
* @DAMOS_FILTER_TYPE_ANON: Anonymous pages.
* @DAMOS_FILTER_TYPE_MEMCG: Specific memcg's pages.
+ * @DAMOS_FILTER_TYPE_YOUNG: Recently accessed pages.
* @DAMOS_FILTER_TYPE_ADDR: Address range.
* @DAMOS_FILTER_TYPE_TARGET: Data Access Monitoring target.
* @NR_DAMOS_FILTER_TYPES: Number of filter types.
@@ -315,6 +316,7 @@ struct damos_stat {
enum damos_filter_type {
DAMOS_FILTER_TYPE_ANON,
DAMOS_FILTER_TYPE_MEMCG,
+ DAMOS_FILTER_TYPE_YOUNG,
DAMOS_FILTER_TYPE_ADDR,
DAMOS_FILTER_TYPE_TARGET,
NR_DAMOS_FILTER_TYPES,
--- a/mm/damon/sysfs-schemes.c~mm-damon-add-damos-filter-type-young
+++ a/mm/damon/sysfs-schemes.c
@@ -343,6 +343,7 @@ static struct damon_sysfs_scheme_filter
static const char * const damon_sysfs_scheme_filter_type_strs[] = {
"anon",
"memcg",
+ "young",
"addr",
"target",
};
_
Patches currently in -mm which might be from sj@xxxxxxxxxx are
mm-damon-paddr-implement-damon_folio_young.patch
mm-damon-paddr-implement-damon_folio_mkold.patch
mm-damon-add-damos-filter-type-young.patch
mm-damon-paddr-implement-damos-filter-type-young.patch
docs-mm-damon-design-document-young-page-type-damos-filter.patch
docs-admin-guide-mm-damon-usage-update-for-young-page-type-damos-filter.patch
docs-abi-damon-update-for-youg-page-type-damos-filter.patch
