1TRACE_BLOCK_BIO_BOUN(9)            Block IO            TRACE_BLOCK_BIO_BOUN(9)
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NAME

6       trace_block_bio_bounce - used bounce buffer when processing block
7       operation
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SYNOPSIS

10       void trace_block_bio_bounce(struct request_queue * q,
11                                   struct bio * bio);
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ARGUMENTS

14       q
15           queue holding the block operation
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17       bio
18           block operation
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DESCRIPTION

21       A bounce buffer was used to handle the block operation bio in q. This
22       occurs when hardware limitations prevent a direct transfer of data
23       between the bio data memory area and the IO device. Use of a bounce
24       buffer requires extra copying of data and decreases performance.
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AUTHORS

27       Jason Baron <jbaron@redhat.com>
28           Author.
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30       William Cohen <wcohen@redhat.com>
31           Author.
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34Kernel Hackers Manual 3.10         June 2019           TRACE_BLOCK_BIO_BOUN(9)
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