blkg_lookup

函数名称：lkg_lookup_create - find or create a blkg*@blkcg: target block cgroup*@q: target request_queue* This looks up or creates the blkg representing the unique pair* of the blkcg and the request_queue.

函数原型：struct blkcg_gq *blkg_lookup_create(struct blkcg *blkcg, struct request_queue *q)

返回类型：struct blkcg_gq

参数：

类型	参数	名称
struct blkcg *	blkcg
struct request_queue *	q

383

blkg等于lkg_lookup - lookup blkg for the specified blkcg - q pair*@blkcg: blkcg of interest*@q: request_queue of interest* Lookup blkg for the @blkcg - @q pair. This function should be called* under RCU read lock.

385

如果此条件成立可能性小(为编译器优化)(!blkg)则

388

spin_lock_irqsave( & queue_lock, flags)

389

blkg等于__blkg_lookup_create - lookup blkg, try to create one if not there*@blkcg: blkcg of interest*@q: request_queue of interest* Lookup blkg for the @blkcg - @q pair. If it doesn't exist, try to* create one

390

spin_unlock_irqrestore( & queue_lock, flags)

393

返回:blkg

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

函数逻辑报告