My system hangs during shutdown if Dazuko is loaded. Why?
When an application registers with Dazuko, the kernel will send all appropriate file access calls to that application. It is the responsibility of the application to allow or deny the access. If the application does not respond, the kernel will wait, causing what appears to be a lock up (i.e. your kernel can’t open any files because it is waiting for the application to respond). During shutdown, some operating systems issue a SIGSTOP which will freeze all running processes (for example, using the killall5 program under GNU/Linux). If one of these processes is registered with Dazuko, the problem mentioned above will occur. To avoid this problem, all applications using Dazuko should be terminated before the system shuts down. This is usually implemented with runlevel control scripts. Under GNU/Linux, another option is to add the /proc directory as an excluded path for Dazuko since killall5 needs to read files from this directory while all other processes are in the STOP state.
