1BLK_ADD_TRACE_RQ_REM(9)          Block Devices         BLK_ADD_TRACE_RQ_REM(9)
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NAME

6       blk_add_trace_rq_remap - Add a trace for a request-remap operation
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SYNOPSIS

9       void blk_add_trace_rq_remap(void * ignore, struct request_queue * q,
10                                   struct request * rq, dev_t dev,
11                                   sector_t from);
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ARGUMENTS

14       ignore
15           trace callback data parameter (not used)
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17       q
18           queue the io is for
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20       rq
21           the source request
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23       dev
24           target device
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26       from
27           source sector
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DESCRIPTION

30       Device mapper remaps request to other devices. Add a trace for that
31       action.
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34Kernel Hackers Manual 3.10         June 2019           BLK_ADD_TRACE_RQ_REM(9)
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