linux-kernel - [RFC PATCH 12/14] mm/damon/core: destroy targets when kdamond

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Message-Id: <20250706200018.42704-13-sj@kernel.org>
Date: Sun,  6 Jul 2025 13:00:16 -0700
From: SeongJae Park <sj@...nel.org>
To: 
Cc: SeongJae Park <sj@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	damon@...ts.linux.dev,
	kernel-team@...a.com,
	linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: [RFC PATCH 12/14] mm/damon/core: destroy targets when kdamond_fn() finish

When kdamond_fn() completes, the targets are kept.  Those are kept to
let callers do additional cleanups if they need.  There are no such
additional cleanups though.  DAMON sysfs interface deallocates those in
before_terminate() callback, to reduce unnecessary memory usage, for
[f]vaddr use case.  Just destroy the targets for every case in the core
layer.  This saves more memory and simplifies the logic.

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

diff --git a/mm/damon/core.c b/mm/damon/core.c
index 6d526c5263d3..719373bcfaad 100644
--- a/mm/damon/core.c
+++ b/mm/damon/core.c
@@ -2617,6 +2617,7 @@ static int kdamond_fn(void *data)
 		running_exclusive_ctxs = false;
 	mutex_unlock(&damon_lock);

+	damon_destroy_targets(ctx);
 	return 0;
 }

-- 
2.39.5