函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:fs\io-wq.c Create Date:2022-07-29 10:55:36
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：We need a worker. If we find a free one, we're good. If not, and we're* below the max number of workers, wake up the manager to create one.

函数原型：static void io_wqe_wake_worker(struct io_wqe *wqe, struct io_wqe_acct *acct)

返回类型：void

参数：

类型参数名称
struct io_wqe *wqe
struct io_wqe_acct *acct
284  WARN_ON_ONCE(!max_workers)
286  _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
287  ret等于Check head of free list for an available worker. If one isn't available,* caller must wake up the wq manager to create one.
288  _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()
290  如果非ret且nr_workers小于max_workers则唤醒中断线程
调用者
名称描述
io_wqe_dec_running
io_wqe_enqueue