I'm not any closer to understanding where/why/what is causing
__lll_mutex_lock_wait to even be called within the nbd-server. The
nbd-server is hung waiting for this mutex but the gdb backtrace is
truncated/useless like I showed earlier in this thread. So is there
just some weird corruption occurring?
I can reliably reproduce this issue and welcome any suggestions; I'll
try to get traces of the nbd-client when it fails and also compile
nbd-server with DDODBG.
I'll report back if I find anything but any assistance would be appreciated.