linux-kernel - [PATCH 2/9] mm/damon/paddr: support ops

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Message-Id: <20250304211913.53574-3-sj@kernel.org>
Date: Tue,  4 Mar 2025 13:19:06 -0800
From: SeongJae Park <sj@...nel.org>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: SeongJae Park <sj@...nel.org>,
	damon@...ts.linux.dev,
	kernel-team@...a.com,
	linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: [PATCH 2/9] mm/damon/paddr: support ops_filters

DAMON keeps all DAMOS filters in damos->filters.  Upcoming changes will
make it to use damos->ops_filters for all operations layer handled DAMOS
filters, though.  DAMON physical address space operations set
implementation (paddr) is not ready for the changes, since it handles
only damos->filters.  To avoid any breakage during the upcoming changes,
make paddr to handle both lists.  After the change is made, ->filters
support on paddr can be safely removed.

Signed-off-by: SeongJae Park <sj@...nel.org>
---
 mm/damon/paddr.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/mm/damon/paddr.c b/mm/damon/paddr.c
index d5db313ca717..2b1ea568a431 100644
--- a/mm/damon/paddr.c
+++ b/mm/damon/paddr.c
@@ -260,6 +260,10 @@ static bool damos_pa_filter_out(struct damos *scheme, struct folio *folio)
 		if (damos_pa_filter_match(filter, folio))
 			return !filter->allow;
 	}
+	damos_for_each_ops_filter(filter, scheme) {
+		if (damos_pa_filter_match(filter, folio))
+			return !filter->allow;
+	}
 	return false;
 }
 
@@ -290,6 +294,12 @@ static unsigned long damon_pa_pageout(struct damon_region *r, struct damos *s,
 			break;
 		}
 	}
+	damos_for_each_ops_filter(filter, s) {
+		if (filter->type == DAMOS_FILTER_TYPE_YOUNG) {
+			install_young_filter = false;
+			break;
+		}
+	}
 	if (install_young_filter) {
 		filter = damos_new_filter(
 				DAMOS_FILTER_TYPE_YOUNG, true, false);
@@ -538,6 +548,8 @@ static bool damon_pa_scheme_has_filter(struct damos *s)
 
 	damos_for_each_filter(f, s)
 		return true;
+	damos_for_each_ops_filter(f, s)
+		return true;
 	return false;
 }
 
-- 
2.39.5