[RFC PATCH 1/5] mm/damon/api: introduce DAMON_FILTER_TYPE_PGIDLE_SET

[SJ Park <sj@kernel.org>]

DAMON_FILTER_TYPE_PGIDLE_UNSET matches only memory that was able to
confirm if it is marked as idle.  If the memory cannot be marked as
idle, it simply doesn't match.  Hence, finding memory that was marked as
idle with only DAMON_FILTER_TYPE_PGIDLE_UNSET is impossible.  Introduce
a new filter for the purpose, DAMON_FILTER_TYPE_PGIDLE_SET.

Signed-off-by: SJ Park <sj@kernel.org>
---
 include/linux/damon.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/linux/damon.h b/include/linux/damon.h
index 871d26adf6ae5..16800b3dc379b 100644
--- a/include/linux/damon.h
+++ b/include/linux/damon.h
@@ -774,11 +774,13 @@ struct damon_prep {
  * @DAMON_FILTER_TYPE_ANON:		Anonymous pages.
  * @DAMON_FILTER_TYPE_MEMCG:		Specific memcg's pages.
  * @DAMON_FILTER_TYPE_PGIDLE_UNSET:	Pgidle is unset.
+ * @DAMON_FILTER_TYPE_PGIDLE_SET:	Pgidle is set.
  */
 enum damon_filter_type {
 	DAMON_FILTER_TYPE_ANON,
 	DAMON_FILTER_TYPE_MEMCG,
 	DAMON_FILTER_TYPE_PGIDLE_UNSET,
+	DAMON_FILTER_TYPE_PGIDLE_SET,
 };
 
 /**
-- 
2.47.3