blkio: Export disk time and sectors used by a group to user space

[deliverable/linux.git] / block / cfq-iosched.c

diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 662d4e55b3c2c683f8ece4419282ad8925bedb90..7d345e772d88120b5f4065f1f0a4d717a777e9e9 100644 (file)
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -143,6 +143,8 @@ struct cfq_queue {
        struct cfq_rb_root *service_tree;
        struct cfq_queue *new_cfqq;
        struct cfq_group *cfqg;
+       /* Sectors dispatched in current dispatch round */
+       unsigned long nr_sectors;
 };
 
 /*
@@ -852,6 +854,7 @@ cfq_group_service_tree_del(struct cfq_data *cfqd, struct cfq_group *cfqg)
        if (!RB_EMPTY_NODE(&cfqg->rb_node))
                cfq_rb_erase(&cfqg->rb_node, st);
        cfqg->saved_workload_slice = 0;
+       blkiocg_update_blkio_group_dequeue_stats(&cfqg->blkg, 1);
 }
 
 static inline unsigned int cfq_cfqq_slice_usage(struct cfq_queue *cfqq)
@@ -878,7 +881,8 @@ static inline unsigned int cfq_cfqq_slice_usage(struct cfq_queue *cfqq)
                        slice_used = allocated_slice;
        }
 
-       cfq_log_cfqq(cfqq->cfqd, cfqq, "sl_used=%u", slice_used);
+       cfq_log_cfqq(cfqq->cfqd, cfqq, "sl_used=%u sect=%lu", slice_used,
+                               cfqq->nr_sectors);
        return slice_used;
 }
 
@@ -906,6 +910,8 @@ static void cfq_group_served(struct cfq_data *cfqd, struct cfq_group *cfqg,
 
        cfq_log_cfqg(cfqd, cfqg, "served: vt=%llu min_vt=%llu", cfqg->vdisktime,
                                        st->min_vdisktime);
+       blkiocg_update_blkio_group_stats(&cfqg->blkg, used_sl,
+                                               cfqq->nr_sectors);
 }
 
 #ifdef CONFIG_CFQ_GROUP_IOSCHED
@@ -924,6 +930,8 @@ cfq_find_alloc_cfqg(struct cfq_data *cfqd, struct cgroup *cgroup, int create)
        void *key = cfqd;
        int i, j;
        struct cfq_rb_root *st;
+       struct backing_dev_info *bdi = &cfqd->queue->backing_dev_info;
+       unsigned int major, minor;
 
        /* Do we need to take this reference */
        if (!css_tryget(&blkcg->css))
@@ -951,7 +959,9 @@ cfq_find_alloc_cfqg(struct cfq_data *cfqd, struct cgroup *cgroup, int create)
        atomic_set(&cfqg->ref, 1);
 
        /* Add group onto cgroup list */
-       blkiocg_add_blkio_group(blkcg, &cfqg->blkg, (void *)cfqd);
+       sscanf(dev_name(bdi->dev), "%u:%u", &major, &minor);
+       blkiocg_add_blkio_group(blkcg, &cfqg->blkg, (void *)cfqd,
+                                       MKDEV(major, minor));
 
        /* Add group on cfqd list */
        hlist_add_head(&cfqg->cfqd_node, &cfqd->cfqg_list);
@@ -1478,6 +1488,7 @@ static void __cfq_set_active_queue(struct cfq_data *cfqd,
                cfqq->dispatch_start = jiffies;
                cfqq->slice_end = 0;
                cfqq->slice_dispatch = 0;
+               cfqq->nr_sectors = 0;
 
                cfq_clear_cfqq_wait_request(cfqq);
                cfq_clear_cfqq_must_dispatch(cfqq);
@@ -1801,6 +1812,7 @@ static void cfq_dispatch_insert(struct request_queue *q, struct request *rq)
 
        if (cfq_cfqq_sync(cfqq))
                cfqd->sync_flight++;
+       cfqq->nr_sectors += blk_rq_sectors(rq);
 }
 
 /*
@@ -3513,7 +3525,8 @@ static void *cfq_init_queue(struct request_queue *q)
         * to make sure that cfq_put_cfqg() does not try to kfree root group
         */
        atomic_set(&cfqg->ref, 1);
-       blkiocg_add_blkio_group(&blkio_root_cgroup, &cfqg->blkg, (void *)cfqd);
+       blkiocg_add_blkio_group(&blkio_root_cgroup, &cfqg->blkg, (void *)cfqd,
+                                       0);
 #endif
        /*
         * Not strictly needed (since RB_ROOT just clears the node and we