1BLK_ADD_TRACE_REMAP(9) Block Devices BLK_ADD_TRACE_REMAP(9)
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6 blk_add_trace_remap - Add a trace for a remap operation
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9 void blk_add_trace_remap(void * ignore, struct request_queue * q,
10 struct bio * bio, dev_t dev, sector_t from);
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13 ignore
14 trace callback data parameter (not used)
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16 q
17 queue the io is for
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19 bio
20 the source bio
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22 dev
23 target device
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25 from
26 source sector
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29 Device mapper or raid target sometimes need to split a bio because it
30 spans a stripe (or similar). Add a trace for that action.
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33Kernel Hackers Manual 2.6. November 2011 BLK_ADD_TRACE_REMAP(9)