From 2d8b24654feabc62ed9e132911319f1c48ab0256 Mon Sep 17 00:00:00 2001 From: SeongJae Park Date: Fri, 26 Apr 2024 12:52:42 -0700 Subject: [PATCH] mm/damon: add DAMOS filter type YOUNG Define yet another DAMOS filter type, YOUNG. Like anon and memcg, the type of filter will be applied to each page in the memory region, and see if the page is accessed since the last check. Based on the 'matching' parameter, the page is filtered out or in. Note that this commit is adding only the type definition. The implementation should be made by DAMON operations sets. A commit for the implementation on 'paddr' DAMON operations set will follow. Link: https://lkml.kernel.org/r/20240426195247.100306-4-sj@kernel.org Signed-off-by: SeongJae Park Tested-by: Honggyu Kim Cc: Jonathan Corbet Signed-off-by: Andrew Morton --- include/linux/damon.h | 2 ++ mm/damon/sysfs-schemes.c | 1 + 2 files changed, 3 insertions(+) diff --git a/include/linux/damon.h b/include/linux/damon.h index 886d07294f4e..f7da65e1ac04 100644 --- a/include/linux/damon.h +++ b/include/linux/damon.h @@ -297,6 +297,7 @@ struct damos_stat { * enum damos_filter_type - Type of memory for &struct damos_filter * @DAMOS_FILTER_TYPE_ANON: Anonymous pages. * @DAMOS_FILTER_TYPE_MEMCG: Specific memcg's pages. + * @DAMOS_FILTER_TYPE_YOUNG: Recently accessed pages. * @DAMOS_FILTER_TYPE_ADDR: Address range. * @DAMOS_FILTER_TYPE_TARGET: Data Access Monitoring target. * @NR_DAMOS_FILTER_TYPES: Number of filter types. @@ -315,6 +316,7 @@ struct damos_stat { enum damos_filter_type { DAMOS_FILTER_TYPE_ANON, DAMOS_FILTER_TYPE_MEMCG, + DAMOS_FILTER_TYPE_YOUNG, DAMOS_FILTER_TYPE_ADDR, DAMOS_FILTER_TYPE_TARGET, NR_DAMOS_FILTER_TYPES, diff --git a/mm/damon/sysfs-schemes.c b/mm/damon/sysfs-schemes.c index 53a90ac678fb..bea5bc52846a 100644 --- a/mm/damon/sysfs-schemes.c +++ b/mm/damon/sysfs-schemes.c @@ -343,6 +343,7 @@ static struct damon_sysfs_scheme_filter *damon_sysfs_scheme_filter_alloc(void) static const char * const damon_sysfs_scheme_filter_type_strs[] = { "anon", "memcg", + "young", "addr", "target", };