Re: [PATCH] virtio-blk: make the queue depth configurable

[Joe Perches]

On Fri, 2014-03-14 at 13:31 -0400, Theodore Ts'o wrote:
> The current virtio block sets a queue depth of 64.  With a
> sufficiently fast device, using a queue depth of 256 can double the
> IOPS which can be sustained.  So make the queue depth something which
> can be set at module load time or via a kernel boot-time parameter.
[]
> diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
[]
> @@ -481,6 +481,9 @@ static struct blk_mq_ops virtio_mq_ops = {
>  	.free_hctx	= blk_mq_free_single_hw_queue,
>  };
>  
> +static int queue_depth = 64;
> +module_param(queue_depth, int, 444);

444?  Really Ted?

0444



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