diff options
| author | SJ Park <sj@kernel.org> | 2026-09-15 07:33:50 -0700 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2026-10-12 21:26:13 -0700 |
| commit | 222636c8c1398d6ada686ee12d5170f716ee75fc (patch) | |
| tree | 726108df09d91f81f5ebb33716177b37503c73e1 /include/linux | |
| parent | b59925301211ccc351d98d70b11f6d1b2c63150f (diff) | |
mm/damon/api: introduce DAMON_FILTER_TYPE_HUGEPAGE_SIZE
Patch series "mm/damon: introduce hugepage_size probe filter".
Knowing whether a given memory is backed by a hugepage of specific size
is useful for efficient utilization of hugepages. For easy monitoring
of the information, introduce a new data attribute probe filter type,
hugepage_size. It works similar to the DAMOS filter of the same name.
It works for memory that is backed by a hugepage of a given size range.
Patch 1 introduces the new probe filter type to DAMON API and extends
related data structures. Patch 2 updates probe filter commit logic to
handle the size range. Patch 3 Updates the filtering logic to support
the new type. Patch 4 adds new DAMON sysfs files for the size range.
Patch 5 updates DAMON sysfs interface to fully support the new filter
type. Patches 6-8 updates design, usage and ABI documents for the new
feature.
This patch (of 8):
Introduce a new data attribute probe filter type, hugepage_size. It will
work for memory that is backed by a hugepage of a given size range. Add a
new damon_filter_type enum DAMON_FILTER_TYPE_HUGEPAGE_SIZE to identify the
type. Add two new fields in the damon_filter struct for saving the size
range.
Link: https://lore.kernel.org/20260915143359.91472-1-sj@kernel.org
Link: https://lore.kernel.org/20260915143359.91472-2-sj@kernel.org
Signed-off-by: SJ Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/damon.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/damon.h b/include/linux/damon.h index 4be7d1df8e71..bbb190b47401 100644 --- a/include/linux/damon.h +++ b/include/linux/damon.h @@ -783,12 +783,14 @@ struct damon_prep { * @DAMON_FILTER_TYPE_MEMCG: Specific memcg's pages. * @DAMON_FILTER_TYPE_PGIDLE_UNSET: Pgidle is unset. * @DAMON_FILTER_TYPE_PGIDLE_SET: Pgidle is set. + * @DAMON_FILTER_TYPE_HUGEPAGE_SIZE: Page is part of a hugepage. */ enum damon_filter_type { DAMON_FILTER_TYPE_ANON, DAMON_FILTER_TYPE_MEMCG, DAMON_FILTER_TYPE_PGIDLE_UNSET, DAMON_FILTER_TYPE_PGIDLE_SET, + DAMON_FILTER_TYPE_HUGEPAGE_SIZE, }; /** @@ -798,6 +800,8 @@ enum damon_filter_type { * @matching: Whether this filter is for the type-matching ones. * @allow: Whether the @type-@matching ones should pass this filter. * @memcg_id: Memcg id of the question if @type is DAMON_FILTER_MEMCG. + * @range_min: Minimum value of range arguments. + * @range_max: Maximum value of range arguments. */ struct damon_filter { enum damon_filter_type type; @@ -805,6 +809,10 @@ struct damon_filter { bool allow; union { u64 memcg_id; + struct { + unsigned long range_min; + unsigned long range_max; + }; }; /* private: */ /* Siblings list. */ |