diff options
| author | Usama Arif <usamaarif642@gmail.com> | 2025-02-11 12:43:40 +0000 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2025-03-16 22:06:12 -0700 |
| commit | 0431c42622612a96cce97cdd4cfbe7d487606cf3 (patch) | |
| tree | bdea8014466d3549da627d268eab79186ddd9896 /include/linux/damon.h | |
| parent | 026e8b55aa05b728e5f5f7858cd91385bf0642e4 (diff) | |
mm/damon: introduce DAMOS filter type hugepage_size
Patch series "mm/damon: add support for hugepage_size DAMOS filter", v5.
hugepage_size DAMOS filter can be used to gather statistics to check if
memory regions of specific access tempratures are backed by hugepages of a
size in a specific range. This filter can help to observe and prove the
effectivenes of different schemes for shrinking/collapsing hugepages.
This patch (of 4):
This is to gather statistics to check if memory regions of specific access
tempratures are backed by pages of a size in a specific range. This
filter can help to observe and prove the effectivenes of different schemes
for shrinking/collapsing hugepages.
[sj@kernel.org: add kernel-doc comment for damos_filter->sz_range]
Link: https://lkml.kernel.org/r/20250218223058.52459-1-sj@kernel.org
Link: https://lkml.kernel.org/r/20250211124437.278873-1-usamaarif642@gmail.com
Link: https://lkml.kernel.org/r/20250211124437.278873-2-usamaarif642@gmail.com
Signed-off-by: Usama Arif <usamaarif642@gmail.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Cc: David Hildenbrand <david@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Usama Arif <usamaarif642@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux/damon.h')
| -rw-r--r-- | include/linux/damon.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/damon.h b/include/linux/damon.h index b4d37d9b9221..5e7ae7bca5dc 100644 --- a/include/linux/damon.h +++ b/include/linux/damon.h @@ -36,6 +36,16 @@ struct damon_addr_range { }; /** + * struct damon_size_range - Represents size for filter to operate on [@min, @max]. + * @min: Min size (inclusive). + * @max: Max size (inclusive). + */ +struct damon_size_range { + unsigned long min; + unsigned long max; +}; + +/** * struct damon_region - Represents a monitoring target region. * @ar: The address range of the region. * @sampling_addr: Address of the sample for the next access check. @@ -326,6 +336,7 @@ struct damos_stat { * @DAMOS_FILTER_TYPE_ANON: Anonymous pages. * @DAMOS_FILTER_TYPE_MEMCG: Specific memcg's pages. * @DAMOS_FILTER_TYPE_YOUNG: Recently accessed pages. + * @DAMOS_FILTER_TYPE_HUGEPAGE_SIZE: Page is part of a hugepage. * @DAMOS_FILTER_TYPE_ADDR: Address range. * @DAMOS_FILTER_TYPE_TARGET: Data Access Monitoring target. * @NR_DAMOS_FILTER_TYPES: Number of filter types. @@ -345,6 +356,7 @@ enum damos_filter_type { DAMOS_FILTER_TYPE_ANON, DAMOS_FILTER_TYPE_MEMCG, DAMOS_FILTER_TYPE_YOUNG, + DAMOS_FILTER_TYPE_HUGEPAGE_SIZE, DAMOS_FILTER_TYPE_ADDR, DAMOS_FILTER_TYPE_TARGET, NR_DAMOS_FILTER_TYPES, @@ -360,6 +372,7 @@ enum damos_filter_type { * @target_idx: Index of the &struct damon_target of * &damon_ctx->adaptive_targets if @type is * DAMOS_FILTER_TYPE_TARGET. + * @sz_range: Size range if @type is DAMOS_FILTER_TYPE_HUGEPAGE_SIZE. * @list: List head for siblings. * * Before applying the &damos->action to a memory region, DAMOS checks if each @@ -376,6 +389,7 @@ struct damos_filter { unsigned short memcg_id; struct damon_addr_range addr_range; int target_idx; + struct damon_size_range sz_range; }; struct list_head list; }; |