函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:block\blk.h Create Date:2022-07-27 13:22:50
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：The max size one bio can handle is UINT_MAX becasue bvec_iter.bi_size* is defined as 'unsigned int', meantime it has to aligned to with logical* block size which is the minimum accepted unit by hardware.

函数原型：static inline unsigned int bio_allowed_max_sectors(struct request_queue *q)

返回类型：unsigned int

参数：

类型参数名称
struct request_queue *q
271  返回:und_down - round down to next specified power of 2*@x: the value to round*@y: multiple to round down to (must be a power of 2)* Rounds @x down to next multiple of @y (which must be a power of 2).* To perform arbitrary rounding down, use rounddown() below.(UINT_MAX, queue_logical_block_size(q))右移9位
调用者
名称描述
blk_bio_discard_split
__blkdev_issue_discard
__blkdev_issue_write_same__blkdev_issue_write_same - generate number of bios with same page*@bdev: target blockdev*@sector: start sector*@nr_sects: number of sectors to write*@gfp_mask: memory allocation flags (for bio_alloc)*@page: page containing data to write*@biop: pointer to