id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	field_blocks	field_dependson	field_seealso
700	Deadlock between devman and locsrv	Ondra Hlavatý	Jakub Jermář	"In yet undiscovered conditions, a deadlock while booting occurs. The kernel is still alive, but devman is stuck and the compositor won't start. It does happen quite frequently on ""bad"" builds, but ""bad"" build happens very sparsely. It seems to be a result of a race condition. Also, level of optimization is related - it happens more on optimized builds, never happened with -O0.

In the attached image, you can see the waiting IPC calls. We already discussed on this on IRC and mailing list, but then it happened once again, so here you have the bug report.

There is a cycle, which I haven't noticed at first. It is probably the cause of the deadlock, but I'm not able to identify the root cause myself.

Of course, there is a possibility that our xhci driver is causing it. But in every case, faulty driver should not block devman."	defect	closed	major		helenos/srv/locsrv		fixed	deadlock ipc