cfq-iosched: Fix a memory leak of per cpu stats for root group

We allocated per cpu stats struct for root group but did not free it. Fix it. Signed-off-by: Vivek Goyal <[email protected]> Signed-off-by: Jens Axboe <[email protected]>
ambv · May 23, 2011 · 2abae55 · 2abae55
1 parent 345227d
commit 2abae55
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
@@ -3940,6 +3940,11 @@ static void cfq_exit_queue(struct elevator_queue *e)
 	 */
 	if (wait)
 		synchronize_rcu();
+
+#ifdef CONFIG_CFQ_GROUP_IOSCHED
+	/* Free up per cpu stats for root group */
+	free_percpu(cfqd->root_group.blkg.stats_cpu);
+#endif
 	kfree(cfqd);
 }