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 3.11 November 2013 TRACE_BLOCK_BIO_BOUN(9)[top]
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