Comment 94 for bug 818177
Revision history for this message
| Steve Langasek (vorlon) wrote Re: boot failures because 'udevadm exit' times out while udevd waits for an already-dead thread | #94 |
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1b1ed1a
(Get the code!)
The root error is that in worker_new(), at lines 353 ff., the worker threads process signals and udev event handling requests in the same loop. If it happens that both the signal and the event are received close enough together to be returned in the same epoll_wait(), and the udev_monitor handle is listed *first* in the epoll_event list, the worker will receive the event message (which increases the refcount on the udevd master side), then process the signal, and immediately exit without handling the event.
This should be handled by processing fd_signal first, and only if SIGTERM was not received, process fd_monitor. This ensures that we always exit ASAP after receiving the signal, instead of going off and processing another event that could take an indeterminate amount of time.