On Sat, 2017-08-05 at 14:56 +0800, Ming Lei wrote:
> More importantly, for some SCSI devices, driver
> tags are host wide, and the number is quite big,
> but each lun has very limited queue depth.
This may be the case but is not always the case. Another important use-case
is one LUN per host and where the queue depth per LUN is identical to the
number of host tags.
> +struct request *blk_mq_dispatch_rq_from_ctx(struct blk_mq_hw_ctx *hctx,
> + struct blk_mq_ctx *start)
> +{
> + unsigned off = start ? start->index_hw : 0;
Please consider to rename this function into blk_mq_dispatch_rq_from_next_ctx()
and to start from start->index_hw + 1 instead of start->index_hw. I think that
will not only result in simpler but also in faster code.
Thanks,
Bart.
