On 9/5/2021 12:46 AM, Leon Romanovsky wrote:

quoted

+static unsigned int num_request_queues;
+module_param_cb(num_request_queues, &queue_count_ops, &num_request_queues,
+		0644);
+MODULE_PARM_DESC(num_request_queues,
+		 "Number of request queues to use for blk device. Should > 0");
+

Won't it limit all virtio block devices to the same limit?

It is very common to see multiple virtio-blk devices on the same system
and they probably need different limits.

Thanks

Without looking into the code, that can be done adding a configfs

interface and overriding a global value (module param) when it is set from

configfs.