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Subject[PATCH] mm/damon: Prevent unnecessary age reset for regions
Date
DAMON resets the age of each region after applying each scheme,
regardless of whether the scheme has been successfully applied.

This patch adds a simple condition to prevent the age of regions from
being reset when schemes have not been actually applied.

Signed-off-by: Hyeongtak Ji <hyeongtak.ji@sk.com>
---
mm/damon/core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/damon/core.c b/mm/damon/core.c
index 91cff7f2997e..4044fcf18ac1 100644
--- a/mm/damon/core.c
+++ b/mm/damon/core.c
@@ -908,7 +908,7 @@ static void damos_apply_scheme(struct damon_ctx *c, struct damon_target *t,
quota->charge_addr_from = r->ar.end + 1;
}
}
- if (s->action != DAMOS_STAT)
+ if (s->action != DAMOS_STAT && sz_applied > 0)
r->age = 0;

update_stat:
--
2.7.4
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