kdamond_apply_schemes() checks apply intervals of schemes and avoid further applying any schemes if no scheme passed its apply interval. However, the following schemes applying function, damon_do_apply_schemes() iterates all schemes without the apply interval check. As a result, the shortest apply interval is applied to all schemes. Fix the problem by checking the apply interval in damon_do_apply_schemes().

Fixes: 42f994b71404 ("mm/damon/core: implement scheme-specific apply interval") Cc: stable@vger.kernel.org # 6.7.x Signed-off-by: SeongJae Park sj@kernel.org --- Sending the same patch[1] again because the subject of the patch was broken.

[1] https://lore.kernel.org/linux-mm/20240204204946.87265-1-sj@kernel.org/

mm/damon/core.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/mm/damon/core.c b/mm/damon/core.c index 0c144fb466b8..f444734cc613 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -1064,6 +1064,9 @@ static void damon_do_apply_schemes(struct damon_ctx *c, damon_for_each_scheme(s, c) { struct damos_quota *quota = &s->quota;

+ if (c->passed_sample_intervals != s->next_apply_sis) + continue; + if (!s->wmarks.activated) continue;

@@ -1216,10 +1219,6 @@ static void kdamond_apply_schemes(struct damon_ctx *c) if (c->passed_sample_intervals != s->next_apply_sis) continue;

- s->next_apply_sis += - (s->apply_interval_us ? s->apply_interval_us : - c->attrs.aggr_interval) / sample_interval; - if (!s->wmarks.activated) continue;

@@ -1235,6 +1234,14 @@ static void kdamond_apply_schemes(struct damon_ctx *c) damon_for_each_region_safe(r, next_r, t) damon_do_apply_schemes(c, t, r); } + + damon_for_each_scheme(s, c) { + if (c->passed_sample_intervals != s->next_apply_sis) + continue; + s->next_apply_sis += + (s->apply_interval_us ? s->apply_interval_us : + c->attrs.aggr_interval) / sample_interval; + } }

/*