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mm/damon: avoid division by zero from damos_quota_score()

SJ Park damon linux-mm lkml stable 1 version Applied

Status from this message: [merged mm-hotfixes-stable] mm-damon-lru_sort-error-out-for-10000-active_mem_bp.patch removed from -mm tree

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  1. v1 Latest2 patches 3 repliesApplied 2/2

Changes from RFC v2 from the cover letter

- RFC v2: https://lore.kernel.org/[email protected]
- Drop RFC tag.
Changes from RFC
- RFC: https://lore.kernel.org/[email protected]
- Add a fix for DAMON_LRU_SORT.

Patches in v1 All 2 applied

#Subject and filesSizeRepliesApplied
1/2samples/damon/mtier: error out for zero quota goal target valuessamples/damon/mtier.c+3 -01 replyApplied
2/2mm/damon/lru_sort: error out for >10000 active_mem_bpmm/damon/lru_sort.c+2 -02 repliesApplied

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

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 v2
- RFC v2: https://lore.kernel.org/[email protected]
- Drop RFC tag.
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: 3bf69d5b51b688b8f923a13b7f12eb9b1c6a284f

Signature · 1 line
2.47.3

Read the cover letter in its thread