Linux kernel | 块IO子系统请求处理过程、multi-queue框架、请求合并处理blk_plug
Linux通用块层提供给上层的接口函数是submit_bio。上层在构造好bio请求之后,调用该接口提交给Linux通用块层处理。上层向块io子系统提交请求我们首先从submit_bio函数入手://common/block/blk-core.c:10blk_qc_tsubmit_bio(structbio*bio){if(blkcg_punt_bio_submit(bio))returnBLK_