diff options
Diffstat (limited to 'drivers/md/dm.c')
| -rw-r--r-- | drivers/md/dm.c | 27 |
1 files changed, 25 insertions, 2 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 621450282d08..d17be1efb4d8 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -233,6 +233,12 @@ static bool use_blk_mq = true; static bool use_blk_mq = false; #endif +#define DM_MQ_NR_HW_QUEUES 1 +#define DM_MQ_QUEUE_DEPTH 2048 + +static unsigned dm_mq_nr_hw_queues = DM_MQ_NR_HW_QUEUES; +static unsigned dm_mq_queue_depth = DM_MQ_QUEUE_DEPTH; + bool dm_use_blk_mq(struct mapped_device *md) { return md->use_blk_mq; @@ -303,6 +309,17 @@ unsigned dm_get_reserved_rq_based_ios(void) } EXPORT_SYMBOL_GPL(dm_get_reserved_rq_based_ios); +static unsigned dm_get_blk_mq_nr_hw_queues(void) +{ + return __dm_get_module_param(&dm_mq_nr_hw_queues, 1, 32); +} + +static unsigned dm_get_blk_mq_queue_depth(void) +{ + return __dm_get_module_param(&dm_mq_queue_depth, + DM_MQ_QUEUE_DEPTH, BLK_MQ_MAX_DEPTH); +} + static int __init local_init(void) { int r = -ENOMEM; @@ -2695,10 +2712,10 @@ static int dm_init_request_based_blk_mq_queue(struct mapped_device *md) memset(&md->tag_set, 0, sizeof(md->tag_set)); md->tag_set.ops = &dm_mq_ops; - md->tag_set.queue_depth = BLKDEV_MAX_RQ; + 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 = 1; + md->tag_set.nr_hw_queues = dm_get_blk_mq_nr_hw_queues(); 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); @@ -3669,6 +3686,12 @@ MODULE_PARM_DESC(reserved_rq_based_ios, "Reserved IOs in request-based mempools" module_param(use_blk_mq, bool, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(use_blk_mq, "Use block multiqueue for request-based DM devices"); +module_param(dm_mq_nr_hw_queues, uint, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(dm_mq_nr_hw_queues, "Number of hardware queues for request-based dm-mq devices"); + +module_param(dm_mq_queue_depth, uint, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(dm_mq_queue_depth, "Queue depth for request-based dm-mq devices"); + MODULE_DESCRIPTION(DM_NAME " driver"); MODULE_AUTHOR("Joe Thornber <dm-devel@redhat.com>"); MODULE_LICENSE("GPL"); |