函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:block\bio.c Create Date:2022-07-27 18:31:54
Last Modify:2020-03-17 23:13:58 Copyright©Brick
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函数名称：_associate_blkg - associate a bio with a blkg*@bio: target bio* Associate @bio with the blkg found from the bio's css and request_queue

函数原型：void bio_associate_blkg(struct bio *bio)

返回类型：void

参数：

类型参数名称
struct bio *bio
2156  _read_lock() - mark the beginning of an RCU read-side critical section* When synchronize_rcu() is invoked on one CPU while other CPUs* are within RCU read-side critical sections, then the* synchronize_rcu() is guaranteed to block until after all the other
2158  如果* Represents the association of the css and request_queue for the bio. * If a bio goes direct to device, it will not have a blkg as it will * not have a request_queue associated with it. The reference is put * on release of the bio.则css等于css
2160  否则css等于lkcg_css - find the current css* Find the css associated with either the kthread or the current task.* This may return a dying css, so it is up to the caller to use tryget logic* to confirm it is alive and well.
2163  _associate_blkg_from_css - associate a bio with a specified css*@bio: target bio*@css: target css* Associate @bio with the blkg found by combining the css's blkg and the* request_queue of the @bio. This falls back to the queue's root_blkg if
2165  _read_unlock() - marks the end of an RCU read-side critical section.* In most situations, rcu_read_unlock() is immune from deadlock.* However, in kernels built with CONFIG_RCU_BOOST, rcu_read_unlock()
调用者
名称描述
blkcg_bio_issue_check