bfq_serv_to_charge

Name:see the definition of bfq_async_charge_factor for details

Proto:static unsigned long bfq_serv_to_charge(struct request *rq, struct bfq_queue *bfqq)

Type:unsigned long

Parameter:

Type	Parameter	Name
struct request *	rq
struct bfq_queue *	bfqq

921

If bfq_bfqq_sync(bfqq) || actor by which the weight of this queue is multiplied > 1 || The following function returns false either if every active queue* must receive the same share of the throughput (symmetric scenario),* or, as a special case, if bfqq must receive a share of the* throughput lower than or equal to the share that every Then Return blk_rq_sectors(rq)

925

Return blk_rq_sectors(rq) * When a sync request is dispatched, the queue that contains that* request, and all the ancestor entities of that queue, are charged* with the number of sectors of the request

**Caller**
Name	Describe
bfq_updated_next_req	q_updated_next_req - update the queue after a new next_rq selection
bfq_bfqq_update_budg_for_activation	The next function, invoked after the input queue bfqq switches from* idle to busy, updates the budget of bfqq. The function also tells* whether the in-service queue should be expired, by returning* true
__bfq_bfqq_recalc_budget	__bfq_bfqq_recalc_budget - try to adapt the budget to the @bfqq behavior.@bfqd: device data.@bfqq: queue to update.@reason: reason for expiration. Handle the feedback on @bfqq budget at queue expiration.* See the body for detailed comments.
bfq_choose_bfqq_for_injection	This function chooses the queue from which to pick the next extra* I/O request to inject, if it finds a compatible queue
bfq_select_queue	Select a queue for service. If we have a current queue in service,* check whether to continue servicing it, or retrieve and set a new one.
bfq_dispatch_rq_from_bfqq	Dispatch next request from bfqq.

Source code conversion tool public plug-in interface	X
Support c/c++/esqlc/java Oracle/Informix/Mysql Plug-in can realize: logical Report Code generation and batch code conversion