[debug help]: get dprintk() outputs in src/crush/mapper.c or net/crush/mapper.c

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Hi,

There are many dprintk() statements in the file mapper.c. How can we get to see outputs from these statements? I would like to see these, to get a better understanding about how these functions work together and then enhance my added algorithm. Besides, adding a printf() statement in the crush_do_rule() or my simple bucket_directmap_choose() does not give me any output. Thanks.

Xing
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