linux-kernel - [RFC PATCH 5/5] mm/damon/sysfs-schemes: accept "node_sys_bp" in goal's target

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Message-ID: <20260123045733.6954-6-ravis.opensrc@gmail.com>
Date: Thu, 22 Jan 2026 20:57:28 -0800
From: Ravi Jonnalagadda <ravis.opensrc@...il.com>
To: damon@...ts.linux.dev,
	linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	linux-doc@...r.kernel.org
Cc: sj@...nel.org,
	akpm@...ux-foundation.org,
	corbet@....net,
	bijan311@...il.com,
	ajayjoshi@...ron.com,
	Ravi Jonnalagadda <ravis.opensrc@...il.com>
Subject: [RFC PATCH 5/5] mm/damon/sysfs-schemes: accept "node_sys_bp" in goal's target_metric

Allow userspace to select the new goal metric "node_sys_bp" by writing
it to goals/<G>/target_metric. Also set goal->nid for this metric when
committing goals from sysfs to the running schemes.

Signed-off-by: Ravi Jonnalagadda <ravis.opensrc@...il.com>
---
 mm/damon/sysfs-schemes.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/mm/damon/sysfs-schemes.c b/mm/damon/sysfs-schemes.c
index 3a699dcd5a7f..37cd5d715821 100644
--- a/mm/damon/sysfs-schemes.c
+++ b/mm/damon/sysfs-schemes.c
@@ -1038,6 +1038,10 @@ struct damos_sysfs_qgoal_metric_name damos_sysfs_qgoal_metric_names[] = {
 		.metric = DAMOS_QUOTA_NODE_MEMCG_FREE_BP,
 		.name = "node_memcg_free_bp",
 	},
+	{
+		.metric = DAMOS_QUOTA_NODE_SYS_BP,
+		.name = "node_sys_bp",
+	},
 };
 
 static ssize_t target_metric_show(struct kobject *kobj,
@@ -2566,6 +2570,9 @@ static int damos_sysfs_add_quota_score(
 			}
 			goal->nid = sysfs_goal->nid;
 			break;
+		case DAMOS_QUOTA_NODE_SYS_BP:
+			goal->nid = sysfs_goal->nid;
+			break;
 		default:
 			break;
 		}
-- 
2.43.0