Function report |
Source Code:fs\io_uring.c |
Create Date:2022-07-28 20:22:08 |
Last Modify:2020-03-12 14:18:49 | Copyright©Brick |
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Annotation kernel can get tool activity | Download SCCT | Chinese |
Name:io_ring_ctx_alloc
Proto:static struct io_ring_ctx *io_ring_ctx_alloc(struct io_uring_params *p)
Type:struct io_ring_ctx
Parameter:
Type | Parameter | Name |
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struct io_uring_params * | p |
505 | ctx = kzalloc - allocate memory. The memory is set to zero.*@size: how many bytes of memory are required.*@flags: the type of memory to allocate (see kmalloc). |
506 | If Not ctx Then Return NULL |
510 | If Not if all else fails... Then Go to err |
514 | If Not 0 is for ctx quiesce/reinit/free, 1 is for sqo_thread started Then Go to err |
522 | hash_bits -= 5 |
525 | cancel_hash_bits = hash_bits |
526 | cancel_hash = Allocation memory |
528 | If Not cancel_hash Then Go to err |
530 | __hash_init(cancel_hash, 1U << hash_bits) |
537 | init_waitqueue_head( & cq_wait) |
541 | mutex_init - initialize the mutex*@mutex: the mutex to be initialized* Initialize the mutex to unlocked state.* It is not allowed to initialize an already locked mutex.( & uring_lock) |
542 | init_waitqueue_head( & wait) |
547 | init_waitqueue_head( & inflight_wait) |
550 | Return ctx |
551 | err : |
552 | If if all else fails... Then kmem_cache_free(req_cachep, if all else fails... ) |
555 | kfree(cancel_hash) |
557 | Return NULL |
Name | Describe |
---|---|
io_uring_create |
Source code conversion tool public plug-in interface | X |
---|---|
Support c/c++/esqlc/java Oracle/Informix/Mysql Plug-in can realize: logical Report Code generation and batch code conversion |