Commit 2a689e4e authored Mar 04, 2025 by SeongJae Park Committed by Andrew Morton Mar 17, 2025

mm/damon/core: put ops-handled filters to damos->ops_filters

damos->ops_filters has introduced to be used for all operations layer
handled filters. But DAMON kernel API callers can put any type of DAMOS
filters to any of damos->filters and damos->ops_filters. DAMON user-space
ABI users have no way to use ->ops_filters at all. Update
damos_add_filter(), which should be used by API callers to install DAMOS
filters, to add filters to ->filters and ->ops_filters depending on their
handling layer. The change forces both API callers and ABI users to use
proper lists since ABI users use the API internally.

Link: https://lkml.kernel.org/r/20250304211913.53574-5-sj@kernel.org

Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

parent 3607cc59

mm/damon/core.c

+16 −1

Original line number	Diff line number	Diff line
		@@ -281,8 +281,23 @@ struct damos_filter *damos_new_filter(enum damos_filter_type type,
		return filter;
		}

		static bool damos_filter_for_ops(enum damos_filter_type type)
		{
		switch (type) {
		case DAMOS_FILTER_TYPE_ADDR:
		case DAMOS_FILTER_TYPE_TARGET:
		return false;
		default:
		break;
		}
		return true;
		}

		void damos_add_filter(struct damos s, struct damos_filter f)
		{
		if (damos_filter_for_ops(f->type))
		list_add_tail(&f->list, &s->ops_filters);
		else
		list_add_tail(&f->list, &s->filters);
		}