[RFC PATCH v2 0/2] mm/damon: avoid division by zero from damos_quota_score()

SJ Park <[email protected]> Sun, 2 Aug 2026 09:20:47 -0700
Newsgroups dev.linux.lists.damon,org.kernel.vger.linux-kernel,org.kernel.vger.stable,org.kvack.linux-mm
Message-ID <[email protected]> 
DAMON_SAMPLE_MTIER and DAMON_LRU_SORT allow the user to trigger division
by zero in damos_quota_score().  Avoid it by adding parameters
validation checks.

Changes from RFC
- RFC: https://lore.kernel.org/[email protected]
- Add a fix for DAMON_LRU_SORT.

SJ Park (2):
  samples/damon/mtier: error out for zero quota goal target values
  mm/damon/lru_sort: error out for >10000 active_mem_bp

 mm/damon/lru_sort.c   | 2 ++
 samples/damon/mtier.c | 3 +++
 2 files changed, 5 insertions(+)


base-commit: 51d61cb34d137b13957ce83455c1f596d39e8cfe
-- 
2.47.3