There is nothing specific to epoll_wait(), that's just the function that
these daemons wait in for practially all the time. The SIGABRT is due to
systemd killing/restarting the processes as they don't respond withing 1
minute (watchdog). In Fila's case the kernel reports hung tasks (in a
page fault, i. e. slow/broken swap?), but in Till's reports there is no
other apparent error message.
This is not just limited to QEMU, e. g. duplicate bug 1438805 is a real
machine with a hardware watchdog. So we still only merely know the
symptoms -- something stalls these QEMU or real laptop processes, but we
don't know yet how. Does anyone have some observations/recipes how to
reproduce this? I. e. did you start a lot of QEMU instances in parallel
or something else what could make these slow? Maybe a running SSD TRIM
in the background?
** Changed in: systemd (Ubuntu)
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/1433320
Title:
systemd-journald, udev, logind get killed by 1 min watchdog timeout
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