[RFC PATCH 04/20] loop: allow user to set the queue depth
flat view
STALE2089d
From: Chaitanya Kulkarni <hidden>
Date: 2021-02-02 05:37:31
Subsystem:
block layer, the rest · Maintainers:
Jens Axboe, Linus Torvalds
Instead of hardcoding queue depth allow user to set the hw queue depth using module parameter. Set default value to 128 to retain the existing behavior. Signed-off-by: Chaitanya Kulkarni <redacted> --- drivers/block/loop.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 0a8cee66c622..cf2789f7e6ba 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c@@ -1950,6 +1950,9 @@ module_param(max_loop, int, 0444); MODULE_PARM_DESC(max_loop, "Maximum number of loop devices"); module_param(max_part, int, 0444); MODULE_PARM_DESC(max_part, "Maximum number of partitions per loop device"); +static int hw_queue_depth = 128; +module_param_named(hw_queue_depth, hw_queue_depth, int, 0444); +MODULE_PARM_DESC(hw_queue_depth, "Queue depth for each hardware queue. Default: 128"); MODULE_LICENSE("GPL"); MODULE_ALIAS_BLOCKDEV_MAJOR(LOOP_MAJOR);
@@ -2105,7 +2108,7 @@ static int loop_add(struct loop_device **l, int i) err = -ENOMEM; lo->tag_set.ops = &loop_mq_ops; lo->tag_set.nr_hw_queues = 1; - lo->tag_set.queue_depth = 128; + lo->tag_set.queue_depth = hw_queue_depth; lo->tag_set.numa_node = NUMA_NO_NODE; lo->tag_set.cmd_size = sizeof(struct loop_cmd); lo->tag_set.flags = BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_STACKING;
--
2.22.1