cgroup/cpuset: Fix obsolete comment in cpuset_css_offline()

JIRA: https://issues.redhat.com/browse/RHEL-107751

commit 6e6f917
Author: Waiman Long <longman@redhat.com>
Date:   Mon, 7 Apr 2025 17:21:04 -0400

    cgroup/cpuset: Fix obsolete comment in cpuset_css_offline()

    Move the partition disablement comment from cpuset_css_offline()
    to cpuset_css_killed() and reword it to remove the remnant of
    sched.partition.

    Suggested-by: Michal Koutný <mkoutny@suse.com>
    Signed-off-by: Waiman Long <longman@redhat.com>
    Signed-off-by: Tejun Heo <tj@kernel.org>

Signed-off-by: Waiman Long <longman@redhat.com>

Author: Waiman-Long

kernel/cgroup/cpuset.c

@@ -3561,11 +3561,7 @@ static int cpuset_css_online(struct cgroup_subsys_state *css)
  * will call rebuild_sched_domains_locked(). That is not needed
  * in the default hierarchy where only changes in partition
  * will cause repartitioning.
- *
- * If the cpuset has the 'sched.partition' flag enabled, simulate
- * turning 'sched.partition" off.
  */
-
 static void cpuset_css_offline(struct cgroup_subsys_state *css)
 {
 	struct cpuset *cs = css_cs(css);
@@ -3583,6 +3579,11 @@ static void cpuset_css_offline(struct cgroup_subsys_state *css)
 	cpus_read_unlock();
 }
 
+/*
+ * If a dying cpuset has the 'cpus.partition' enabled, turn it off by
+ * changing it back to member to free its exclusive CPUs back to the pool to
+ * be used by other online cpusets.
+ */
 static void cpuset_css_killed(struct cgroup_subsys_state *css)
 {
 	struct cpuset *cs = css_cs(css);