trace_block_bio_bounce (9) - Linux Manuals
trace_block_bio_bounce: used bounce buffer when processing block operation
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 [at] redhat.com>
- Author.
William Cohen <wcohen [at] redhat.com>
- Author.
COPYRIGHT