From 0431c42622612a96cce97cdd4cfbe7d487606cf3 Mon Sep 17 00:00:00 2001 From: Usama Arif Date: Tue, 11 Feb 2025 12:43:40 +0000 Subject: 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 Reviewed-by: SeongJae Park Cc: David Hildenbrand Cc: Johannes Weiner Cc: Usama Arif Signed-off-by: Andrew Morton --- include/linux/damon.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'include/linux') 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 @@ -35,6 +35,16 @@ struct damon_addr_range { unsigned long end; }; +/** + * 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. @@ -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; }; -- cgit v1.2.3