linux-kernel - [PATCH 2/9] mm/damon/sysfs-schemes: use nr_accesses_bp as the source of tried_regions/<N>/nr

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Message-Id: <20230916020945.47296-3-sj@kernel.org>
Date:   Sat, 16 Sep 2023 02:09:38 +0000
From:   SeongJae Park <sj@...nel.org>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     SeongJae Park <sj@...nel.org>, damon@...ts.linux.dev,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/9] mm/damon/sysfs-schemes: use nr_accesses_bp as the source of tried_regions/<N>/nr_accesses

DAMON sysfs interface exposes access rate of each region via DAMOS tried
regions directory.  For this, the nr_accesses field of the region is
used.  DAMOS was actually using nr_accesses in the past, but it uses
nr_accesses_bp now.  Use the value that it is really using as the
source.

Note that this doesn't expose nr_accesses_bp as is (in basis point), but
after converting it to the natural number by dividing the value by
10,000.  Hence there is no behavioral change from users' perspective.

Signed-off-by: SeongJae Park <sj@...nel.org>
---
 mm/damon/sysfs-schemes.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/damon/sysfs-schemes.c b/mm/damon/sysfs-schemes.c
index 527e7d17eb3b..093700f50b18 100644
--- a/mm/damon/sysfs-schemes.c
+++ b/mm/damon/sysfs-schemes.c
@@ -31,7 +31,7 @@ static struct damon_sysfs_scheme_region *damon_sysfs_scheme_region_alloc(
 		return NULL;
 	sysfs_region->kobj = (struct kobject){};
 	sysfs_region->ar = region->ar;
-	sysfs_region->nr_accesses = region->nr_accesses;
+	sysfs_region->nr_accesses = region->nr_accesses_bp / 10000;
 	sysfs_region->age = region->age;
 	INIT_LIST_HEAD(&sysfs_region->list);
 	return sysfs_region;
-- 
2.25.1