get_task_io_context

函数名称：get_task_io_context - get io_context of a task*@task: task of interest*@gfp_flags: allocation flags, used if allocation is necessary*@node: allocation node, used if allocation is necessary* Return io_context of @task

函数原型：struct io_context *get_task_io_context(struct task_struct *task, gfp_t gfp_flags, int node)

返回类型：struct io_context

参数：

类型	参数	名称
struct task_struct *	task
gfp_t	gfp_flags
int	node

301

might_sleep_if(gfpflags_allow_blocking(gfp_flags))

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循环

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Protects ->fs, ->files, ->mm, ->group_info, ->comm, keyring* subscriptions and synchronises with wait4(). Also used in procfs. Also* pins the final release of task.io_context. Also protects ->cpuset and* ->cgroup.subsys[]. And ->vfork_done.

305

ioc等于io_context

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如果此条件成立可能性大(为编译器优化)(ioc)则

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get_io_context - increment reference count to io_context*@ioc: io_context to get* Increment reference count to @ioc.

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task_unlock(task)

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返回:ioc

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task_unlock(task)

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当非create_task_io_context(task, gfp_flags, node)循环

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返回:NULL

**调用者**
名称	描述
set_task_ioprio
copy_io	复制I/O

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