Man page 9 : trace_block_split

trace_block_split - split a single bio struct into two bio structs

void trace_block_split(struct request_queue *  q , struct bio *  bio , unsigned int  new_sector );

q
    queue containing the bio

bio
    block operation being split

new_sector
    The starting sector for the new bio

The bio request bio in request queue q needs to be split into two bio requests. The newly created bio request starts at new_sector. This split may be required due to hardware limitation such as operation crossing device boundaries in a RAID system.

Jason Baron <>
    Author.

William Cohen <>
    Author.