Re: [Libguestfs] [PATCH v2 nbdkit 3/6] filters: Print filter name in debugging messages.

nbdkit_debug implicitly prints the plugin name. However this leads to confusing debug messages such as: nbdkit: pattern[1]: debug: prepare nbdkit: pattern[1]: debug: prepare (in this instance, two different prepare functions were called in different filters, but neither filter name was shown). By printing the filter name in the debug message we improve the output: nbdkit: pattern[1]: debug: truncate: prepare nbdkit: pattern[1]: debug: map: prepare Another example of the improved output is: nbdkit: pattern[1]: debug: truncate: can_flush # filter nbdkit: pattern[1]: debug: map: can_flush # filter nbdkit: pattern[1]: debug: can_flush # plugin