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mm/damon/core-test: test damon_split_region_at()'s access rate copying

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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@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Brendan Higgins <brendanhiggins@google.com>
Cc: David Gow <davidgow@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
SeongJae Park 2023-11-19 17:15:29 +00:00 committed by Andrew Morton
parent a5989d4ed4
commit 50668b53f8
1 changed files with 11 additions and 4 deletions
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15
mm/damon/core-test.h
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@ -122,18 +122,25 @@ static void damon_test_split_at(struct kunit *test)
{
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);