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From: Chaitanya Kulkarni <chaitanyak@nvidia.com>
To: <linux-block@vger.kernel.org>
Cc: Chaitanya Kulkarni <kch@nvidia.com>,
	Himanshu Madhani <himanshu.madhani@oracle.com>
Subject: [PATCH V2 8/8] loop: allow user to set the queue depth
Date: Wed, 22 Sep 2021 18:49:45 -0700	[thread overview]
Message-ID: <20210923014945.6229-9-chaitanyak@nvidia.com> (raw)
In-Reply-To: <20210923014945.6229-1-chaitanyak@nvidia.com>

From: Chaitanya Kulkarni <kch@nvidia.com>

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 <kch@nvidia.com>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
---
 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 6478d3b0dd2a..aeba72b5dd2d 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -2096,6 +2096,9 @@ 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);
 
@@ -2328,7 +2331,7 @@ static int loop_add(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 |
-- 
2.29.0


      parent reply	other threads:[~2021-09-23  1:51 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-23  1:49 [PATCH V2 0/8] loop: small clenaup Chaitanya Kulkarni
2021-09-23  1:49 ` [PATCH V2 1/8] loop: use sysfs_emit() in the sysfs offset show Chaitanya Kulkarni
2021-09-23  1:49 ` [PATCH V2 2/8] loop: use sysfs_emit() in the sysfs sizelimit show Chaitanya Kulkarni
2021-09-23  1:49 ` [PATCH V2 3/8] loop: use sysfs_emit() in the sysfs autoclear show Chaitanya Kulkarni
2021-09-23  1:49 ` [PATCH V2 4/8] loop: use sysfs_emit() in the sysfs partscan show Chaitanya Kulkarni
2021-09-23  1:49 ` [PATCH V2 5/8] loop: use sysfs_emit() in the sysfs dio show Chaitanya Kulkarni
2021-09-23  1:49 ` [PATCH V2 6/8] loop: remove extra variable in lo_fallocate() Chaitanya Kulkarni
2021-09-23  1:49 ` [PATCH V2 7/8] loop: remove extra variable in lo_req_flush Chaitanya Kulkarni
2021-09-23  1:49 ` Chaitanya Kulkarni [this message]

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