Re: [PATCH v2] block: BFQ default for single queue devices

Bart Van Assche
2018-10-15T15:02:15Z

On Mon, 2018-10-15 at 16:10 +0200, Linus Walleij wrote:
> + * For blk-mq devices, we default to using:
> + * - "none" for multiqueue devices (nr_hw_queues != 1)
> + * - "bfq", if available, for single queue devices
> + * - "mq-deadline" if "bfq" is not available for single queue devices
> + * - "none" for single queue devices as well as last resort

For SATA SSDs nr_hw_queues == 1 so this patch will also affect these SSDs.
Since this patch is an attempt to improve performance, I'd like to see
measurement data for one or more recent SATA SSDs before a decision is
taken about what to do with this patch.

Thanks,

Bart.