TRACE_BLOCK_BIO_BOUN(9) Block IO TRACE_BLOCK_BIO_BOUN(9)
NAME
trace_block_bio_bounce - used bounce buffer when processing block operation
SYNOPSIS
void trace_block_bio_bounce(struct request_queue * q, struct bio * bio);
ARGUMENTS
q
queue holding the block operation
bio
block operation
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.
AUTHORS
Jason Baron <jbaron@redhat.com>
Author.
William Cohen <wcohen@redhat.com>
Author.
COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 TRACE_BLOCK_BIO_BOUN(9)
