sb_init_dio_done

函数名称：Create workqueue for deferred direct IO completions. We allocate the* workqueue when it's first needed. This avoids creating workqueue for* filesystems that don't need it and also allows us to create the workqueue

函数原型：int sb_init_dio_done_wq(struct super_block *sb)

返回类型：int

参数：

类型	参数	名称
struct super_block *	sb

596

wq等于alloc_workqueue("dio/%s", WQ_MEM_RECLAIM, 0, s_id)

599

如果非wq则返回:负ENOMEM

604

old等于cmpxchg( & s_dio_done_wq, NULL, wq)

606

如果old则destroy_workqueue - safely terminate a workqueue*@wq: target workqueue* Safely destroy a workqueue. All work currently pending will be done first.

608

返回:0

**调用者**
名称	描述
dio_set_defer_completion
do_blockdev_direct_IO	This is a library function for use by filesystem drivers
iomap_dio_rw	map_dio_rw() always completes O_[D]SYNC writes regardless of whether the IO* is being issued as AIO or not. This allows us to optimise pure data writes* to use REQ_FUA rather than requiring generic_write_sync() to issue a* REQ_FLUSH post write

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