Hi list, This week I've finished the implementation of log category support. The core part incorporate changes in log.c and log.h, but the most part of this patch is to add the category definition to each c file. The interface is quite simple, we just need to add one line similar to this "#define PA_LOG_CATEGORY_DEFAULT "module-loopback" " at the first line of the implementation file. During the implementation, I've also spotted a simple error which mixed the wrong parameters, and so a patch is cooked and set out for review. The next step I would do is to refine the categories' name, and start using 'gcov' tool to get the coverage of pulseaudio. How to implement the ring buffer is still undergoing. -deng