io_req_defer

Name:io_req_defer

Proto:static int io_req_defer(struct io_kiocb *req, const struct io_uring_sqe *sqe)

Type:int

Parameter:

Type	Parameter	Name
struct io_kiocb *	req
const struct io_uring_sqe *	sqe

3155

ctx = ctx

3159

If Not req_need_defer(req) && list_empty - tests whether a list is empty*@head: the list to test. Then Return 0

3162

If Not io && io_alloc_async_ctx(req) Then Return -EAGAIN

3165

ret = io_req_defer_prep(req, sqe)

3166

If ret < 0 Then Return ret

3169

spin_lock_irq( & completion_lock)

3170

If Not req_need_defer(req) && list_empty - tests whether a list is empty*@head: the list to test. Then

3171

spin_unlock_irq( & completion_lock)

3172

Return 0

3175

_uring_defer - called when an io_uring request is deferred*@ctx: pointer to a ring context structure*@req: pointer to a deferred request*@user_data: user data associated with the request* Allows to track deferred requests, to get an insight about what

3176

list_add_tail - add a new entry*@new: new entry to be added*@head: list head to add it before* Insert a new entry before the specified head.* This is useful for implementing queues.

3177

spin_unlock_irq( & completion_lock)

3178

Return -cb queued, will get completion event

**Caller**
Name	Describe
io_queue_sqe

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