[PATCH 05/10] mm/damon: add pass argument to damos_new_filter()

SeongJae Park
2025-01-07T20:18:13Z

DAMON API users should set damos_filter->pass manually to use a DAMOS
pass filter, since damos_new_filter() unsets the field always. It is
cumbersome and easy to mistake. Add an arugment for setting the field
to damos_new_filter().

Signed-off-by: SeongJae Park <sj@kernel.org>
---
include/linux/damon.h | 2 +-
mm/damon/core.c | 7 ++++---
mm/damon/paddr.c | 3 ++-
mm/damon/reclaim.c | 2 +-
mm/damon/sysfs-schemes.c | 2 +-
mm/damon/tests/core-kunit.h | 4 ++--
6 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/include/linux/damon.h b/include/linux/damon.h
index baeb884ed156..27593dadbd76 100644
--- a/include/linux/damon.h
+++ b/include/linux/damon.h
@@ -801,7 +801,7 @@ void damon_update_region_access_rate(struct damon_region *r, bool accessed,
struct damon_attrs *attrs);

struct damos_filter *damos_new_filter(enum damos_filter_type type,
- bool matching);
+ bool matching, bool pass);
void damos_add_filter(struct damos *s, struct damos_filter *f);
void damos_destroy_filter(struct damos_filter *f);

diff --git a/mm/damon/core.c b/mm/damon/core.c
index 71db2c754e6d..13f12d82de5f 100644
--- a/mm/damon/core.c
+++ b/mm/damon/core.c
@@ -266,7 +266,7 @@ int damon_set_regions(struct damon_target *t, struct damon_addr_range *ranges,
}

struct damos_filter *damos_new_filter(enum damos_filter_type type,
- bool matching)
+ bool matching, bool pass)
{
struct damos_filter *filter;

@@ -275,7 +275,7 @@ struct damos_filter *damos_new_filter(enum damos_filter_type type,
return NULL;
filter->type = type;
filter->matching = matching;
- filter->pass = false;
+ filter->pass = pass;
INIT_LIST_HEAD(&filter->list);
return filter;
}
@@ -806,7 +806,8 @@ static int damos_commit_filters(struct damos *dst, struct damos *src)
continue;

new_filter = damos_new_filter(
- src_filter->type, src_filter->matching);
+ src_filter->type, src_filter->matching,
+ src_filter->pass);
if (!new_filter)
return -ENOMEM;
damos_commit_filter_arg(new_filter, src_filter);
diff --git a/mm/damon/paddr.c b/mm/damon/paddr.c
index 71cb02128b46..cd89500efc22 100644
--- a/mm/damon/paddr.c
+++ b/mm/damon/paddr.c
@@ -259,7 +259,8 @@ static unsigned long damon_pa_pageout(struct damon_region *r, struct damos *s,
}
}
if (install_young_filter) {
- filter = damos_new_filter(DAMOS_FILTER_TYPE_YOUNG, true);
+ filter = damos_new_filter(
+ DAMOS_FILTER_TYPE_YOUNG, true, false);
if (!filter)
return 0;
damos_add_filter(s, filter);
diff --git a/mm/damon/reclaim.c b/mm/damon/reclaim.c
index 9e0077a9404e..a675150965e0 100644
--- a/mm/damon/reclaim.c
+++ b/mm/damon/reclaim.c
@@ -221,7 +221,7 @@ static int damon_reclaim_apply_parameters(void)
}

if (skip_anon) {
- filter = damos_new_filter(DAMOS_FILTER_TYPE_ANON, true);
+ filter = damos_new_filter(DAMOS_FILTER_TYPE_ANON, true, false);
if (!filter)
goto out;
damos_add_filter(scheme, filter);
diff --git a/mm/damon/sysfs-schemes.c b/mm/damon/sysfs-schemes.c
index deeaf23c1fcf..9a883e8aea1c 100644
--- a/mm/damon/sysfs-schemes.c
+++ b/mm/damon/sysfs-schemes.c
@@ -1901,7 +1901,7 @@ static int damon_sysfs_add_scheme_filters(struct damos *scheme,
sysfs_filters->filters_arr[i];
struct damos_filter *filter =
damos_new_filter(sysfs_filter->type,
- sysfs_filter->matching);
+ sysfs_filter->matching, false);
int err;

if (!filter)
diff --git a/mm/damon/tests/core-kunit.h b/mm/damon/tests/core-kunit.h
index 8f58d3424c21..532c6a6f21f9 100644
--- a/mm/damon/tests/core-kunit.h
+++ b/mm/damon/tests/core-kunit.h
@@ -411,7 +411,7 @@ static void damos_test_new_filter(struct kunit *test)
{
struct damos_filter *filter;

- filter = damos_new_filter(DAMOS_FILTER_TYPE_ANON, true);
+ filter = damos_new_filter(DAMOS_FILTER_TYPE_ANON, true, false);
KUNIT_EXPECT_EQ(test, filter->type, DAMOS_FILTER_TYPE_ANON);
KUNIT_EXPECT_EQ(test, filter->matching, true);
KUNIT_EXPECT_PTR_EQ(test, filter->list.prev, &filter->list);
@@ -425,7 +425,7 @@ static void damos_test_filter_out(struct kunit *test)
struct damon_region *r, *r2;
struct damos_filter *f;

- f = damos_new_filter(DAMOS_FILTER_TYPE_ADDR, true);
+ f = damos_new_filter(DAMOS_FILTER_TYPE_ADDR, true, false);
f->addr_range = (struct damon_addr_range){
.start = DAMON_MIN_REGION * 2, .end = DAMON_MIN_REGION * 6};

--
2.39.5