diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 219fe58e3023..47a0c552c77b 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -2470,7 +2470,8 @@ void task_numa_work(struct callback_head *work)
 		return;
 
 
-	down_read(&mm->mmap_sem);
+	if (!down_read_trylock(&mm->mmap_sem))
+		return;
 	vma = find_vma(mm, start);
 	if (!vma) {
 		reset_ptenuma_scan(p);