[Bug 197861] Shutting down a VM with Kernel 4.14 will sometime hang and a reboot is the only way to recover.

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https://bugzilla.kernel.org/show_bug.cgi?id=197861

--- Comment #35 from Giancarlo Razzolini (grazzolini@xxxxxxxxxxxxx) ---
LimeTech, the kernel should be telling you exactly why the task is in blocked
state, unless you have disabled the hung_task_timeout_secs with:

echo 0 > /proc/sys/kernel/hung_task_timeout_secs

If you have done so, revert that, and you should be able to know why. If, on
the call trace you see vhost_net, then I think it is the same issue. That
workaround works just fine, I have been able to shutdown/reboot several guests,
with different OS'es, across 2 hosts with it.

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