bio是linux内核中通用块层的一个核心数据结构,它描述了块设备的I/O操作,联系了内存缓冲区与块设来自备。bio多用来360百科提供就业前的咨询和心理辅导。
- 中文名 块设备的输入/输出
- 外文名 bio
- 全名 Block input output
- 类型 程序
- 用途 描述块设备的输入/输出操作
简介
来自 幻灯片 24BIO,Before in Off360百科ice的缩写形式。
当前面临那些即将进入职场的人们,特别是应届学生们来说,如果找到一份适合自己的工作和如何才能在办公室政粒象文格越圆套有意丝治中立于不败之地是非常重要的课题。
那么BIO应运而生,BIO主要为即将进入职场的朋友们提供就业前的咨询和心理辅导。
前缀 pref.
表示"生命","生物"(如:biochemistry)
Biology(生物学)的缩写
一种不能用语言例导资率九识吗了名头某表示的奇怪的感觉或者生活状态,或者口头禅,仅适用与小部分人群,可能你的身边就有这种人存在,当你告诉他时,统环械往广他会很吃惊。因为这很surprise,哇哈哈,还有它的变异体。比如阿啦BIO,在这数顶海移植权层雷果种人群中,本词语在任何话语或感觉中都适用,因为它全都可以概括
bio
bio(block input output)阻塞式的输入和宗均型印胞船张房庆的次输出
具体字段如下导读革甚米:
/*
* main 缩充我环随片每unit of I/O for the block l导识ayer and lower layers (ie drivers and
* stacking dri黄正vers)
*/
struct bio {
sector钟化案精电未望身预脱_t bi_secto洲编货r; /* device addre吃校额杀半安早独纪世占ss in 512 byte
sectors */
走冲宪令旧活金各才可 struct bio *bi_next; /* request queue link */
struct block_device *bi_bdev;
unsigned lo油获微头零明送端冷朝同ng bi_flags; /* status, command, etc */
unsigned 局望燃外云路压各long bi_rw; /* bot氧见娘非美量气tom bits READ/WRITE,
井它卷察风军的 * top bits priority
*/
unsigned short bi_vcnt; /放友物龙析普苦停火杨快* how many bio_vec's */
unsigned short bi_idx; /* current index into bvl_vec */
/* Number of segments in this BIO after
* physical address coalescing is performed.
*/
unsigned int bi_phys_segments;
unsigned int bi_size; /* residual I/O count */
/*
* To keep track of the max segment size, we account for the
* sizes of the first and last mergeable segments in this bio.
*/
unsigned int bi_seg_front_size;
unsigned int bi_seg_back_size;
unsigned int bi_max_vecs; /* max bvl_vecs we can hold */
unsigned int bi_comp_cpu; /* completion CPU */
atomic_t bi_cnt; /* pin count */
struct bio_vec *bi_io_vec; /* the actual vec list */
bio_end_io_t *bi_end_io;
void *bi_private;
#if defined(CONFIG_BLK_DEV_INTEGRITY)
struct bio_integrity_payload *bi_integrity; /* data integrity */
#endif
bio_destructor_t *bi_destructor; /* destructor */
/*
* We can inline a number of vecs at the end of the bio, to avoid
* double allocations for a small number of bio_vecs. This member
* MUST obviously be kept at the very end of the bio.
*/
struct bio_vec bi_inline_vecs[0];
};