cfq-iosched: Fix a memory leak of per cpu stats for root group
Vivek Goyal [Mon, 23 May 2011 08:02:19 +0000 (10:02 +0200)]
We allocated per cpu stats struct for root group but did not free it.
Fix it.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>

block/cfq-iosched.c

index d646b27..0316f6e 100644 (file)
@@ -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);
 }