diff --git a/Documentation/admin-guide/cgroup-v2.rst b/Documentation/admin-guide/cgroup-v2.rst
index 993446ab66d0..1bf219829465 100644
--- a/Documentation/admin-guide/cgroup-v2.rst
+++ b/Documentation/admin-guide/cgroup-v2.rst
@@ -2527,6 +2527,13 @@ Cpuset Interface Files
 	a need to change "cpuset.mems" with active tasks, it shouldn't
 	be done frequently.
 
+	For a multithreaded process, the threadgroup leader is
+	considered the owner of the group's memory. Memory policy
+	rebinding and migration will only happen with respect to the
+	threadgroup leader. To avoid unexpected results, non-leading
+	threads shouldn't be put into another cgroup whose "cpuset.mems"
+	doesn't fully overlap that of the threadgroup leader.
+
   cpuset.mems.effective
 	A read-only multiple values file which exists on all
 	cpuset-enabled cgroups.
diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
index a404894411dc..e53f35e2726f 100644
--- a/kernel/cgroup/cpuset.c
+++ b/kernel/cgroup/cpuset.c
@@ -2661,6 +2661,10 @@ void cpuset_update_tasks_nodemask(struct cpuset *cs)
 
 		cpuset_change_task_nodemask(task, &newmems);
 
+		/* Rebind and migrate mm only for thread group leader */
+		if (!thread_group_leader(task))
+			continue;
+
 		mm = get_task_mm(task);
 		if (!mm)
 			continue;