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(struct request_queue * q, struct bio * bio,
10 dev_t dev, sector_t from);
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13 q
14 queue the io is for
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16 bio
17 the source bio
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19 dev
20 target device
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22 from
23 source sector
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26 Device mapper or raid target sometimes need to split a bio because it
27 spans a stripe (or similar). Add a trace for that action.
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30Kernel Hackers Manual 2.6. June 2019 BLK_ADD_TRACE_REMAP(9)