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 AT redhat.com>
           Author.

       William Cohen <wcohen AT redhat.com>
           Author.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                   TRACE_BLOCK_BIO_BOUN(9)