函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:block\bounce.c Create Date:2022-07-27 19:08:56
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称:blk_queue_bounce

函数原型:void blk_queue_bounce(struct request_queue *q, struct bio **bio_orig)

返回类型:void

参数:

类型参数名称
struct request_queue *q
struct bio **bio_orig
367  如果非Check whether this bio carries any data or not. A NULL bio is allowed.则返回
375  如果非* queue needs bounce pages for pages above this limit按位与GFP_DMA的值则
376  如果bounce_pfn大于等于blk_max_pfn则返回
378  pool等于page_pool
379  否则
380  BUG_ON(!mempool_initialized( & isa_page_pool))
381  pool等于isa_page_pool
387  __blk_queue_bounce(q, bio_orig, pool)
调用者
名称描述
blk_mq_make_request