函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:fs\inode.c Create Date:2022-07-29 10:38:09
Last Modify:2020-03-18 19:19:59 Copyright©Brick
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函数名称：Direct i/o helper functions

函数原型：static void __inode_dio_wait(struct inode *inode)

返回类型：void

参数：

类型参数名称
struct inode *inode
2097  wq等于bit_waitqueue( & Misc , __I_DIO_WAKEUP)
2100  循环
2101  Note: we use "set_current_state()" _after_ the wait-queue add,* because we need a memory barrier there on SMP, so that any* wake-function that tests for the wait-queue being active* will be guaranteed to see waitqueue addition _or_ subsequent
2102  如果atomic_read( & i_dio_count)则进程调度
2104  当atomic_read( & i_dio_count)循环
2105  sh_wait - clean up after waiting in a queue*@wq_head: waitqueue waited on*@wq_entry: wait descriptor* Sets current thread back to running state and removes* the wait descriptor from the given waitqueue if still* queued.
调用者
名称描述
inode_dio_waitde_dio_wait - wait for outstanding DIO requests to finish*@inode: inode to wait for* Waits for all pending direct I/O requests to finish so that we can* proceed with a truncate or equivalent operation