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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

May 2018 Kernel Hackers Manual 3.16