mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-12 13:55:32 +00:00
dm: allocate blk_mq_tag_set rather than embed in mapped_device
The blk_mq_tag_set is only needed for dm-mq support. There is point wasting space in 'struct mapped_device' for non-dm-mq devices. Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> # check kzalloc return
This commit is contained in:
parent
faad87df4b
commit
1c357a1e86
1 changed files with 27 additions and 18 deletions
|
@ -223,7 +223,7 @@ struct mapped_device {
|
|||
ktime_t last_rq_start_time;
|
||||
|
||||
/* for blk-mq request-based DM support */
|
||||
struct blk_mq_tag_set tag_set;
|
||||
struct blk_mq_tag_set *tag_set;
|
||||
bool use_blk_mq;
|
||||
};
|
||||
|
||||
|
@ -2388,8 +2388,10 @@ static void free_dev(struct mapped_device *md)
|
|||
unlock_fs(md);
|
||||
|
||||
cleanup_mapped_device(md);
|
||||
if (md->use_blk_mq)
|
||||
blk_mq_free_tag_set(&md->tag_set);
|
||||
if (md->tag_set) {
|
||||
blk_mq_free_tag_set(md->tag_set);
|
||||
kfree(md->tag_set);
|
||||
}
|
||||
|
||||
free_table_devices(&md->table_devices);
|
||||
dm_stats_cleanup(&md->stats);
|
||||
|
@ -2710,24 +2712,28 @@ static int dm_init_request_based_blk_mq_queue(struct mapped_device *md)
|
|||
struct request_queue *q;
|
||||
int err;
|
||||
|
||||
memset(&md->tag_set, 0, sizeof(md->tag_set));
|
||||
md->tag_set.ops = &dm_mq_ops;
|
||||
md->tag_set.queue_depth = dm_get_blk_mq_queue_depth();
|
||||
md->tag_set.numa_node = NUMA_NO_NODE;
|
||||
md->tag_set.flags = BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_SG_MERGE;
|
||||
md->tag_set.nr_hw_queues = dm_get_blk_mq_nr_hw_queues();
|
||||
md->tag_set = kzalloc(sizeof(struct blk_mq_tag_set), GFP_KERNEL);
|
||||
if (!md->tag_set)
|
||||
return -ENOMEM;
|
||||
|
||||
md->tag_set->ops = &dm_mq_ops;
|
||||
md->tag_set->queue_depth = dm_get_blk_mq_queue_depth();
|
||||
md->tag_set->numa_node = NUMA_NO_NODE;
|
||||
md->tag_set->flags = BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_SG_MERGE;
|
||||
md->tag_set->nr_hw_queues = dm_get_blk_mq_nr_hw_queues();
|
||||
md->tag_set->driver_data = md;
|
||||
|
||||
md->tag_set->cmd_size = sizeof(struct dm_rq_target_io);
|
||||
if (md_type == DM_TYPE_REQUEST_BASED) {
|
||||
/* make the memory for non-blk-mq clone part of the pdu */
|
||||
md->tag_set.cmd_size = sizeof(struct dm_rq_target_io) + sizeof(struct request);
|
||||
} else
|
||||
md->tag_set.cmd_size = sizeof(struct dm_rq_target_io);
|
||||
md->tag_set.driver_data = md;
|
||||
/* put the memory for non-blk-mq clone at the end of the pdu */
|
||||
md->tag_set->cmd_size += sizeof(struct request);
|
||||
}
|
||||
|
||||
err = blk_mq_alloc_tag_set(&md->tag_set);
|
||||
err = blk_mq_alloc_tag_set(md->tag_set);
|
||||
if (err)
|
||||
return err;
|
||||
goto out_kfree_tag_set;
|
||||
|
||||
q = blk_mq_init_allocated_queue(&md->tag_set, md->queue);
|
||||
q = blk_mq_init_allocated_queue(md->tag_set, md->queue);
|
||||
if (IS_ERR(q)) {
|
||||
err = PTR_ERR(q);
|
||||
goto out_tag_set;
|
||||
|
@ -2744,7 +2750,10 @@ static int dm_init_request_based_blk_mq_queue(struct mapped_device *md)
|
|||
return 0;
|
||||
|
||||
out_tag_set:
|
||||
blk_mq_free_tag_set(&md->tag_set);
|
||||
blk_mq_free_tag_set(md->tag_set);
|
||||
out_kfree_tag_set:
|
||||
kfree(md->tag_set);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
|
|
Loading…
Reference in a new issue