1. NAME▲

trace_block_bio_bounce - used bounce buffer when processing block operation

2. SYNOPSIS ▲

void trace_block_bio_bounce(struct request_queue *  q , struct bio *  bio );

3. ARGUMENTS ▲

q
    queue holding the block operation

bio
    block operation

4. DESCRIPTION ▲

A bounce buffer was used to handle the block operation bio in q. This occurs when hardware limitations prevent a direct transfer of data between the bio data memory area and the IO device. Use of a bounce buffer requires extra copying of data and decreases performance.

5. AUTHORS ▲

Jason Baron <>
    Author.

William Cohen <>
    Author.

6. COPYRIGHT ▲