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