bfq_dispatch_rq_from_bfqq

Name:Dispatch next request from bfqq.

Proto:static struct request *bfq_dispatch_rq_from_bfqq(struct bfq_data *bfqd, struct bfq_queue *bfqq)

Type:struct request

Parameter:

Type	Parameter	Name
struct bfq_data *	bfqd
struct bfq_queue *	bfqq

4597

rq = fifo isn't expired, next request to serve

4600

service_to_charge = see the definition of bfq_async_charge_factor for details

4602

bfq_bfqq_served(bfqq, service_to_charge)

4604

If bfqq == bfq_queue in service && * Flag set to activate the sampling of the total service time * of a just-arrived first I/O request (see * bfq_update_inject_limit()). This will cause the setting of * waited_rq when the request is finally dispatched. Then

4605

* Flag set to activate the sampling of the total service time * of a just-arrived first I/O request (see * bfq_update_inject_limit()). This will cause the setting of * waited_rq when the request is finally dispatched. = false

4606

* If set, then bfq_update_inject_limit() is invoked when * waited_rq is eventually completed. = rq

4609

Remove request from internal lists.

4611

If bfqq != bfq_queue in service Then Go to return_rq

4625

bfq_update_wr_data(bfqd, bfqq)

4632

If Not ( bfq_tot_busy_queues(bfqd) > 1 && bfq_class_idle(bfqq)) Then Go to return_rq

4635

q_bfqq_expire - expire a queue.*@bfqd: device owning the queue.*@bfqq: the queue to expire.*@compensate: if true, compensate for the time spent idling.*@reason: the reason causing the expiration.* If the process associated with bfqq does slow I/O (e

4637

4638

Return rq

**Caller**
Name	Describe
__bfq_dispatch_request

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