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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>