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-rw-r--r--block/cfq-iosched.c18
1 files changed, 17 insertions, 1 deletions
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 606020f..d646b27 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -1051,7 +1051,7 @@ static void cfq_init_add_cfqg_lists(struct cfq_data *cfqd,
static struct cfq_group * cfq_alloc_cfqg(struct cfq_data *cfqd)
{
struct cfq_group *cfqg = NULL;
- int i, j;
+ int i, j, ret;
struct cfq_rb_root *st;
cfqg = kzalloc_node(sizeof(*cfqg), GFP_ATOMIC, cfqd->queue->node);
@@ -1069,6 +1069,13 @@ static struct cfq_group * cfq_alloc_cfqg(struct cfq_data *cfqd)
* or cgroup deletion path depending on who is exiting first.
*/
cfqg->ref = 1;
+
+ ret = blkio_alloc_blkg_stats(&cfqg->blkg);
+ if (ret) {
+ kfree(cfqg);
+ return NULL;
+ }
+
return cfqg;
}
@@ -1183,6 +1190,7 @@ static void cfq_put_cfqg(struct cfq_group *cfqg)
return;
for_each_cfqg_st(cfqg, i, j, st)
BUG_ON(!RB_EMPTY_ROOT(&st->rb));
+ free_percpu(cfqg->blkg.stats_cpu);
kfree(cfqg);
}
@@ -3995,7 +4003,15 @@ static void *cfq_init_queue(struct request_queue *q)
* throtl_data goes away.
*/
cfqg->ref = 2;
+
+ if (blkio_alloc_blkg_stats(&cfqg->blkg)) {
+ kfree(cfqg);
+ kfree(cfqd);
+ return NULL;
+ }
+
rcu_read_lock();
+
cfq_blkiocg_add_blkio_group(&blkio_root_cgroup, &cfqg->blkg,
(void *)cfqd, 0);
rcu_read_unlock();