bfq_serv_to_charge

函数名称：see the definition of bfq_async_charge_factor for details

函数原型：static unsigned long bfq_serv_to_charge(struct request *rq, struct bfq_queue *bfqq)

返回类型：unsigned long

参数：

类型	参数	名称
struct request *	rq
struct bfq_queue *	bfqq

921

如果bfq_bfqq_sync(bfqq)或actor by which the weight of this queue is multiplied 大于1或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 则返回:blk_rq_sectors(rq)

925

返回:blk_rq_sectors(rq)乘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

**调用者**
名称	描述
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.

源代码转换工具开放的插件接口	X
支持：c/c++/esqlc/java Oracle/Informix/Mysql 插件可实现：逻辑报告代码生成和批量转换代码