函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:block\blk-merge.c Create Date:2022-07-27 18:41:39
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：blk_attempt_req_merge

函数原型：int blk_attempt_req_merge(struct request_queue *q, struct request *rq, struct request *next)

返回类型：int

参数：

类型参数名称
struct request_queue *q
struct request *rq
struct request *next
859  free等于For non-mq, this has to be called with the request spinlock acquired.* For mq with scheduling, the appropriate queue wide lock should be held.
860  如果free则
861  blk_put_request(free)
862  返回:1
865  返回:0
调用者
名称描述
elv_attempt_insert_mergeAttempt to do an insertion back merge. Only check for the case where* we can append 'rq' to an existing request, so we can throw 'rq' away* afterwards.* Returns true if we merged, false otherwise