The patch titled
Subject: mm/damon/core-test: test damon_split_region_at()'s access rate copying
has been added to the -mm mm-unstable branch. Its filename is
mm-damon-core-test-test-damon_split_region_ats-access-rate-copying.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-damon-core-test-test-damon_split_region_ats-access-rate-copying.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/core-test: test damon_split_region_at()'s access rate copying
Date: Sun, 19 Nov 2023 17:15:29 +0000
damon_split_region_at() should set access rate related fields of the
resulting regions same. It may forgotten, and actually there was the
mistake before. Test it with the unit test case for the function.
Link: https://lkml.kernel.org/r/20231119171529.66863-2-sj@xxxxxxxxxx
Signed-off-by: SeongJae Park <sj@xxxxxxxxxx>
Cc: Brendan Higgins <brendanhiggins@xxxxxxxxxx>
Cc: David Gow <davidgow@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/damon/core-test.h | 15 +++++++++++----
1 file changed, 11 insertions(+), 4 deletions(-)
--- a/mm/damon/core-test.h~mm-damon-core-test-test-damon_split_region_ats-access-rate-copying
+++ a/mm/damon/core-test.h
@@ -122,18 +122,25 @@ static void damon_test_split_at(struct k
{
struct damon_ctx *c = damon_new_ctx();
struct damon_target *t;
- struct damon_region *r;
+ struct damon_region *r, *r_new;
t = damon_new_target();
r = damon_new_region(0, 100);
+ r->nr_accesses_bp = 420000;
+ r->nr_accesses = 42;
+ r->last_nr_accesses = 15;
damon_add_region(r, t);
damon_split_region_at(t, r, 25);
KUNIT_EXPECT_EQ(test, r->ar.start, 0ul);
KUNIT_EXPECT_EQ(test, r->ar.end, 25ul);
- r = damon_next_region(r);
- KUNIT_EXPECT_EQ(test, r->ar.start, 25ul);
- KUNIT_EXPECT_EQ(test, r->ar.end, 100ul);
+ r_new = damon_next_region(r);
+ KUNIT_EXPECT_EQ(test, r_new->ar.start, 25ul);
+ KUNIT_EXPECT_EQ(test, r_new->ar.end, 100ul);
+
+ KUNIT_EXPECT_EQ(test, r->nr_accesses_bp, r_new->nr_accesses_bp);
+ KUNIT_EXPECT_EQ(test, r->nr_accesses, r_new->nr_accesses);
+ KUNIT_EXPECT_EQ(test, r->last_nr_accesses, r_new->last_nr_accesses);
damon_free_target(t);
damon_destroy_ctx(c);
_
Patches currently in -mm which might be from sj@xxxxxxxxxx are
mm-damon-core-copy-nr_accesses-when-splitting-region.patch
mm-damon-core-test-test-damon_split_region_ats-access-rate-copying.patch
