linux-kernel - [PATCH RFC v2 08/22] cpuset: use partition_disable() for remote partition disablement

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20251025064844.495525-9-chenridong@huaweicloud.com>
Date: Sat, 25 Oct 2025 06:48:30 +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 RFC v2 08/22] 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 | 20 +++-----------------
 1 file changed, 3 insertions(+), 17 deletions(-)

diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
index ee1140cf45b9..7577e9134094 100644
--- a/kernel/cgroup/cpuset.c
+++ b/kernel/cgroup/cpuset.c
@@ -1754,27 +1754,13 @@ static int remote_partition_enable(struct cpuset *cs, int new_prs,
  */
 static void remote_partition_disable(struct cpuset *cs, struct tmpmasks *tmp)
 {
-	bool isolcpus_updated;
+	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);
-	list_del_init(&cs->remote_sibling);
-	isolcpus_updated = 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_unbound_workqueue_cpumask(isolcpus_updated);
-	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