DAMON operations set for physical address space, namely 'paddr', treats tail pages as unaccessed always. It can also apply DAMOS action to a large folio multiple times within single DAMOS' regions walking. As a result, the monitoring output has poor quality and DAMOS works in unexpected ways when large folios are being used. Fix those. The patches were parts of Usama's hugepage_size DAMOS filter patch series[1]. The first fix has collected from there with a slight commit message change for the subject prefix. The second fix is re-written by SJ and posted as an RFC before this series. The second one also got a slight commit message change for the subject prefix. [1] https://lore.kernel.org/20250203225604.44742-1-usamaarif642@xxxxxxxxx [2] https://lore.kernel.org/20250206231103.38298-1-sj@xxxxxxxxxx SeongJae Park (1): mm/damon: avoid applying DAMOS action to same entity multiple times Usama Arif (1): mm/damon/ops: have damon_get_folio return folio even for tail pages include/linux/damon.h | 11 +++++++++ mm/damon/core.c | 1 + mm/damon/ops-common.c | 2 +- mm/damon/paddr.c | 57 +++++++++++++++++++++++++++++++------------ 4 files changed, 55 insertions(+), 16 deletions(-) base-commit: 9c9a75a50e600803a157f4fc76cb856326406ce4 -- 2.39.5
