linux-kernel - [PATCH 04/14] mm/damon/reclaim: use damon_call() repeat mode instead of damon

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Message-Id: <20250712195016.151108-5-sj@kernel.org>
Date: Sat, 12 Jul 2025 12:50:06 -0700
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 04/14] mm/damon/reclaim: use damon_call() repeat mode instead of damon_callback

DAMON_RECLAIM uses damon_callback for periodically reading and writing
DAMON internal data and parameters.  Use its alternative, damon_call()
repeat mode.

Signed-off-by: SeongJae Park <sj@...nel.org>
---
 mm/damon/reclaim.c | 62 +++++++++++++++++++++++-----------------------
 1 file changed, 31 insertions(+), 31 deletions(-)

diff --git a/mm/damon/reclaim.c b/mm/damon/reclaim.c
index 0fe8996328b8..3c71b4596676 100644
--- a/mm/damon/reclaim.c
+++ b/mm/damon/reclaim.c
@@ -238,6 +238,35 @@ static int damon_reclaim_apply_parameters(void)
 	return err;
 }
 
+static int damon_reclaim_handle_commit_inputs(void)
+{
+	int err;
+
+	if (!commit_inputs)
+		return 0;
+
+	err = damon_reclaim_apply_parameters();
+	commit_inputs = false;
+	return err;
+}
+
+static int damon_reclaim_damon_call_fn(void *arg)
+{
+	struct damon_ctx *c = arg;
+	struct damos *s;
+
+	/* update the stats parameter */
+	damon_for_each_scheme(s, c)
+		damon_reclaim_stat = s->stat;
+
+	return damon_reclaim_handle_commit_inputs();
+}
+
+static struct damon_call_control call_control = {
+	.fn = damon_reclaim_damon_call_fn,
+	.repeat = true,
+};
+
 static int damon_reclaim_turn(bool on)
 {
 	int err;
@@ -257,7 +286,7 @@ static int damon_reclaim_turn(bool on)
 	if (err)
 		return err;
 	kdamond_pid = ctx->kdamond->pid;
-	return 0;
+	return damon_call(ctx, &call_control);
 }
 
 static int damon_reclaim_enabled_store(const char *val,
@@ -296,34 +325,6 @@ module_param_cb(enabled, &enabled_param_ops, &enabled, 0600);
 MODULE_PARM_DESC(enabled,
 	"Enable or disable DAMON_RECLAIM (default: disabled)");
 
-static int damon_reclaim_handle_commit_inputs(void)
-{
-	int err;
-
-	if (!commit_inputs)
-		return 0;
-
-	err = damon_reclaim_apply_parameters();
-	commit_inputs = false;
-	return err;
-}
-
-static int damon_reclaim_after_aggregation(struct damon_ctx *c)
-{
-	struct damos *s;
-
-	/* update the stats parameter */
-	damon_for_each_scheme(s, c)
-		damon_reclaim_stat = s->stat;
-
-	return damon_reclaim_handle_commit_inputs();
-}
-
-static int damon_reclaim_after_wmarks_check(struct damon_ctx *c)
-{
-	return damon_reclaim_handle_commit_inputs();
-}
-
 static int __init damon_reclaim_init(void)
 {
 	int err = damon_modules_new_paddr_ctx_target(&ctx, &target);
@@ -331,8 +332,7 @@ static int __init damon_reclaim_init(void)
 	if (err)
 		goto out;
 
-	ctx->callback.after_wmarks_check = damon_reclaim_after_wmarks_check;
-	ctx->callback.after_aggregation = damon_reclaim_after_aggregation;
+	call_control.data = ctx;
 
 	/* 'enabled' has set before this function, probably via command line */
 	if (enabled)
-- 
2.39.5