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authorMing Lei <tom.leiming@gmail.com>2014-05-27 19:35:14 +0400
committerJens Axboe <axboe@fb.com>2014-05-27 19:37:08 +0400
commit3d2936f457a847d9d88a9cc127e0eb7a0ebba0ff (patch)
tree575a307f9715ee60ab45dbe31b677c644975f7ad /block
parent624dbe47541643b72868a59b2c0059bb53dc923f (diff)
downloadlinux-3d2936f457a847d9d88a9cc127e0eb7a0ebba0ff.tar.xz
block: only allocate/free mq_usage_counter in blk-mq
The percpu counter is only used for blk-mq, so move its allocation and free inside blk-mq, and don't allocate it for legacy queue device. Signed-off-by: Ming Lei <tom.leiming@gmail.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block')
-rw-r--r--block/blk-core.c7
-rw-r--r--block/blk-mq.c5
-rw-r--r--block/blk-sysfs.c2
3 files changed, 6 insertions, 8 deletions
diff --git a/block/blk-core.c b/block/blk-core.c
index 5b6f768a7c01..29d5fbafd94a 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -576,12 +576,9 @@ struct request_queue *blk_alloc_queue_node(gfp_t gfp_mask, int node_id)
if (!q)
return NULL;
- if (percpu_counter_init(&q->mq_usage_counter, 0))
- goto fail_q;
-
q->id = ida_simple_get(&blk_queue_ida, 0, 0, gfp_mask);
if (q->id < 0)
- goto fail_c;
+ goto fail_q;
q->backing_dev_info.ra_pages =
(VM_MAX_READAHEAD * 1024) / PAGE_CACHE_SIZE;
@@ -639,8 +636,6 @@ fail_bdi:
bdi_destroy(&q->backing_dev_info);
fail_id:
ida_simple_remove(&blk_queue_ida, q->id);
-fail_c:
- percpu_counter_destroy(&q->mq_usage_counter);
fail_q:
kmem_cache_free(blk_requestq_cachep, q);
return NULL;
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 07851753a049..e8b5f74dc1a1 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1781,6 +1781,9 @@ struct request_queue *blk_mq_init_queue(struct blk_mq_tag_set *set)
if (!q)
goto err_hctxs;
+ if (percpu_counter_init(&q->mq_usage_counter, 0))
+ goto err_map;
+
q->mq_map = blk_mq_make_queue_map(set);
if (!q->mq_map)
goto err_map;
@@ -1867,6 +1870,8 @@ void blk_mq_free_queue(struct request_queue *q)
blk_mq_exit_hw_queues(q, set, set->nr_hw_queues);
blk_mq_free_hw_queues(q, set);
+ percpu_counter_destroy(&q->mq_usage_counter);
+
free_percpu(q->queue_ctx);
kfree(q->queue_hw_ctx);
kfree(q->mq_map);
diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c
index 4d6811ac13fd..23321fbab293 100644
--- a/block/blk-sysfs.c
+++ b/block/blk-sysfs.c
@@ -517,8 +517,6 @@ static void blk_release_queue(struct kobject *kobj)
if (q->queue_tags)
__blk_queue_free_tags(q);
- percpu_counter_destroy(&q->mq_usage_counter);
-
if (q->mq_ops)
blk_mq_free_queue(q);