Commit dd038b72 authored by SeongJae Park's avatar SeongJae Park Committed by Andrew Morton
Browse files

mm/damon: add default allow/reject behavior fields to struct damos 

Current default allow/reject behavior of filters handling stage has made
before introduction of the allow behavior.  For allow-filters usage, it is
confusing and inefficient.

It is more intuitive to decide the default filtering stage allow/reject
behavior as opposite to the last filter's behavior.  The decision should
be made separately for core and operations layers' filtering stages, since
last core layer-handled filter is not really a last filter if there are
operations layer handling filters.

Keeping separate decisions for the two categories can make the logic
simpler.  Add fields for storing the two decisions.

Link: https://lkml.kernel.org/r/20250304211913.53574-7-sj@kernel.org


Signed-off-by: default avatarSeongJae Park <sj@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 627983a5

include/linux/damon.h

+3 −0
Original line number Diff line number Diff line
@@ -502,6 +502,9 @@ struct damos { 
	 * layer-handled filters.  If true, operations layer allows it, too.

	 */

	bool core_filters_allowed;

	/* whether to reject core/ops filters umatched regions */

	bool core_filters_default_reject;

	bool ops_filters_default_reject;

/* public: */

	struct damos_quota quota;

	struct damos_watermarks wmarks;