[Libguestfs] [PATCH nbdkit 0/7] server: Allow datapath debug messages to be suppressed.

[Richard W.M. Jones]

The immediate reason for this patch is to reduce the amount of
debugging in virt-v2v with using the virt-v2v -v option (because this
implies running nbdkit in verbose mode too).  Most of the messages are
datapath ones about pread/pwrite requests, and in fact as we've added
more filters on top of nbdkit these messages have got more and more
verbose.  However they are not particularly interesting so by using
-D nbdkit.backend.datapath=0 we could suppress all these messages,
reducing the size of the log files by over 2/3rds.

Rich.