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| author | Ming Lei <tom.leiming@gmail.com> | 2014-05-27 23:35:14 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2014-05-27 09:37:08 -0600 |
| commit | 3d2936f457a847d9d88a9cc127e0eb7a0ebba0ff (patch) | |
| tree | 575a307f9715ee60ab45dbe31b677c644975f7ad /block | |
| parent | 624dbe47541643b72868a59b2c0059bb53dc923f (diff) | |
| download | lwn-3d2936f457a847d9d88a9cc127e0eb7a0ebba0ff.tar.gz lwn-3d2936f457a847d9d88a9cc127e0eb7a0ebba0ff.zip | |
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.c | 7 | ||||
| -rw-r--r-- | block/blk-mq.c | 5 | ||||
| -rw-r--r-- | block/blk-sysfs.c | 2 |
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); |