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mm/damon/core: support damos_filter->allow

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DAMOS filters supports allowing behavior, but the core layer's DAMOS
filters handling logic still assumes only rejecting (filtering-out)
behavior.  Update the logic to aware of and respect the behavioral
decision by reading damos_filter->allow when making the decision to
exclude a region or not.

Link: https://lkml.kernel.org/r/20250109175126.57878-4-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
SeongJae Park 2025-01-09 09:51:19 -08:00 • committed by Andrew Morton
parent fe6d7fdd62
commit 491fee286e
2 changed files with 8 additions and 8 deletions
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6
mm/damon/core.c
View file

@ -1374,7 +1374,7 @@ static void damos_update_stat(struct damos *s,
s->stat.sz_ops_filter_passed += sz_ops_filter_passed; s->stat.sz_ops_filter_passed += sz_ops_filter_passed;
} }
static bool __damos_filter_out(struct damon_ctx *ctx, struct damon_target *t, static bool damos_filter_match(struct damon_ctx *ctx, struct damon_target *t,
struct damon_region *r, struct damos_filter *filter) struct damon_region *r, struct damos_filter *filter)
{ {
bool matched = false; bool matched = false;
@ -1428,8 +1428,8 @@ static bool damos_filter_out(struct damon_ctx *ctx, struct damon_target *t,
struct damos_filter *filter; struct damos_filter *filter;
damos_for_each_filter(filter, s) { damos_for_each_filter(filter, s) {
if (__damos_filter_out(ctx, t, r, filter)) if (damos_filter_match(ctx, t, r, filter))
return true; return !filter->allow;
} }
return false; return false;
} }

10
mm/damon/tests/core-kunit.h
View file

@ -434,25 +434,25 @@ static void damos_test_filter_out(struct kunit *test)
damon_add_region(r, t); damon_add_region(r, t);
/* region in the range */ /* region in the range */
KUNIT_EXPECT_TRUE(test, __damos_filter_out(NULL, t, r, f)); KUNIT_EXPECT_TRUE(test, damos_filter_match(NULL, t, r, f));
KUNIT_EXPECT_EQ(test, damon_nr_regions(t), 1); KUNIT_EXPECT_EQ(test, damon_nr_regions(t), 1);
/* region before the range */ /* region before the range */
r->ar.start = DAMON_MIN_REGION * 1; r->ar.start = DAMON_MIN_REGION * 1;
r->ar.end = DAMON_MIN_REGION * 2; r->ar.end = DAMON_MIN_REGION * 2;
KUNIT_EXPECT_FALSE(test, __damos_filter_out(NULL, t, r, f)); KUNIT_EXPECT_FALSE(test, damos_filter_match(NULL, t, r, f));
KUNIT_EXPECT_EQ(test, damon_nr_regions(t), 1); KUNIT_EXPECT_EQ(test, damon_nr_regions(t), 1);
/* region after the range */ /* region after the range */
r->ar.start = DAMON_MIN_REGION * 6; r->ar.start = DAMON_MIN_REGION * 6;
r->ar.end = DAMON_MIN_REGION * 8; r->ar.end = DAMON_MIN_REGION * 8;
KUNIT_EXPECT_FALSE(test, __damos_filter_out(NULL, t, r, f)); KUNIT_EXPECT_FALSE(test, damos_filter_match(NULL, t, r, f));
KUNIT_EXPECT_EQ(test, damon_nr_regions(t), 1); KUNIT_EXPECT_EQ(test, damon_nr_regions(t), 1);
/* region started before the range */ /* region started before the range */
r->ar.start = DAMON_MIN_REGION * 1; r->ar.start = DAMON_MIN_REGION * 1;
r->ar.end = DAMON_MIN_REGION * 4; r->ar.end = DAMON_MIN_REGION * 4;
KUNIT_EXPECT_FALSE(test, __damos_filter_out(NULL, t, r, f)); KUNIT_EXPECT_FALSE(test, damos_filter_match(NULL, t, r, f));
/* filter should have split the region */ /* filter should have split the region */
KUNIT_EXPECT_EQ(test, r->ar.start, DAMON_MIN_REGION * 1); KUNIT_EXPECT_EQ(test, r->ar.start, DAMON_MIN_REGION * 1);
KUNIT_EXPECT_EQ(test, r->ar.end, DAMON_MIN_REGION * 2); KUNIT_EXPECT_EQ(test, r->ar.end, DAMON_MIN_REGION * 2);
@ -465,7 +465,7 @@ static void damos_test_filter_out(struct kunit *test)
/* region started in the range */ /* region started in the range */
r->ar.start = DAMON_MIN_REGION * 2; r->ar.start = DAMON_MIN_REGION * 2;
r->ar.end = DAMON_MIN_REGION * 8; r->ar.end = DAMON_MIN_REGION * 8;
KUNIT_EXPECT_TRUE(test, __damos_filter_out(NULL, t, r, f)); KUNIT_EXPECT_TRUE(test, damos_filter_match(NULL, t, r, f));
/* filter should have split the region */ /* filter should have split the region */
KUNIT_EXPECT_EQ(test, r->ar.start, DAMON_MIN_REGION * 2); KUNIT_EXPECT_EQ(test, r->ar.start, DAMON_MIN_REGION * 2);
KUNIT_EXPECT_EQ(test, r->ar.end, DAMON_MIN_REGION * 6); KUNIT_EXPECT_EQ(test, r->ar.end, DAMON_MIN_REGION * 6);