On Fri, Dec 02, 2016 at 08:15:16PM -0700, Jens Axboe wrote:
> For MQ devices, we have to use other functions to run the queue.
> No functional changes in this patch, just a prep patch for
> support legacy schedulers on blk-mq.
>
> Signed-off-by: Jens Axboe <[email protected]>
> ---
> block/cfq-iosched.c | 22 +++++++++++++++++++---
> 1 file changed, 19 insertions(+), 3 deletions(-)
>
> diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
> index c73a6fcaeb9d..d6d454a72bd4 100644
> --- a/block/cfq-iosched.c
> +++ b/block/cfq-iosched.c
> @@ -919,8 +919,14 @@ static inline struct cfq_data *cic_to_cfqd(struct
> cfq_io_cq *cic)
> static inline void cfq_schedule_dispatch(struct cfq_data *cfqd)
> {
> if (cfqd->busy_queues) {
> + struct request_queue *q = cfqd->queue;
> +
> cfq_log(cfqd, "schedule dispatch");
> - kblockd_schedule_work(&cfqd->unplug_work);
> +
> + if (q->mq_ops)
You've introduced blk_use_mq_path() in patch 1, so why don't you use it here
as well?
> + blk_mq_run_hw_queues(q, true);
> + else
> + kblockd_schedule_work(&cfqd->unplug_work);
> }
> }
>
> @@ -4086,6 +4092,16 @@ static void cfq_preempt_queue(struct cfq_data *cfqd,
> struct cfq_queue *cfqq)
> cfq_mark_cfqq_slice_new(cfqq);
> }
>
> +static void cfq_run_queue(struct cfq_data *cfqd)
> +{
> + struct request_queue *q = cfqd->queue;
> +
> + if (q->mq_ops)
Ditto.
> + blk_mq_run_hw_queues(q, true);
> + else
> + __blk_run_queue(q);
> +}
> +
> /*
> * Called when a new fs request (rq) is added (to cfqq). Check if there's
> * something we should do about it
> @@ -4122,7 +4138,7 @@ cfq_rq_enqueued(struct cfq_data *cfqd, struct cfq_queue
> *cfqq,
> cfqd->busy_queues > 1) {
> cfq_del_timer(cfqd, cfqq);
> cfq_clear_cfqq_wait_request(cfqq);
> - __blk_run_queue(cfqd->queue);
> + cfq_run_queue(cfqd);
> } else {
> cfqg_stats_update_idle_time(cfqq->cfqg);
> cfq_mark_cfqq_must_dispatch(cfqq);
> @@ -4136,7 +4152,7 @@ cfq_rq_enqueued(struct cfq_data *cfqd, struct cfq_queue
> *cfqq,
> * this new queue is RT and the current one is BE
> */
> cfq_preempt_queue(cfqd, cfqq);
> - __blk_run_queue(cfqd->queue);
> + cfq_run_queue(cfqd);
> }
> }
>
> --
> 2.7.4
>
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--
Johannes Thumshirn Storage
[email protected] +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
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