linux-kernel - [PATCH -next 07/21] cpuset: use partition_disable() for remote partition disablement

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Message-Id: <20251117024627.1128037-8-chenridong@huaweicloud.com>
Date: Mon, 17 Nov 2025 02:46:13 +0000
From: Chen Ridong <chenridong@...weicloud.com>
To: longman@...hat.com,
	tj@...nel.org,
	hannes@...xchg.org,
	mkoutny@...e.com
Cc: cgroups@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	lujialin4@...wei.com,
	chenridong@...wei.com
Subject: [PATCH -next 07/21] cpuset: use partition_disable() for remote partition disablement

From: Chen Ridong <chenridong@...wei.com>

Now that the partition_disable() helper is available, replace the
existing implementation for remote partition disablement with this
centralized function to unify the disablement logic.

Signed-off-by: Chen Ridong <chenridong@...wei.com>
---
 kernel/cgroup/cpuset.c | 18 ++++--------------
 1 file changed, 4 insertions(+), 14 deletions(-)

diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
index 31c7b967c81d..1482c501a49c 100644
--- a/kernel/cgroup/cpuset.c
+++ b/kernel/cgroup/cpuset.c
@@ -1823,23 +1823,13 @@ static int remote_partition_enable(struct cpuset *cs, int new_prs,
  */
 static void remote_partition_disable(struct cpuset *cs, struct tmpmasks *tmp)
 {
+	int new_prs;
+
 	WARN_ON_ONCE(!is_remote_partition(cs));
 	WARN_ON_ONCE(!cpumask_subset(cs->effective_xcpus, subpartitions_cpus));
 
-	spin_lock_irq(&callback_lock);
-	cs->remote_partition = false;
-	partition_xcpus_del(cs->partition_root_state, NULL, cs->effective_xcpus);
-	if (cs->prs_err)
-		cs->partition_root_state = -cs->partition_root_state;
-	else
-		cs->partition_root_state = PRS_MEMBER;
-
-	/* effective_xcpus may need to be changed */
-	compute_excpus(cs, cs->effective_xcpus);
-	reset_partition_data(cs);
-	spin_unlock_irq(&callback_lock);
-	update_isolation_cpumasks();
-	cpuset_force_rebuild();
+	new_prs = cs->prs_err ? -cs->partition_root_state : PRS_MEMBER;
+	partition_disable(cs, NULL, new_prs, cs->prs_err);
 
 	/*
 	 * Propagate changes in top_cpuset's effective_cpus down the hierarchy.
-- 
2.34.1