On Thu, Feb 12, 2015 at 08:50:59AM +0100, Michael Biebl wrote:
> Some more findings: Aside from only happening on reboot, but not
> shutdown, it also seems to only happen with i6300esb. Switching the qemu
> config to use ib700 instead of i6300esb, I am not able to trigger the
> problem. This confirm's Peter's findings who was not able to reproduce
> it on real hardware.
> 
> I wonder, if this is a qemu issue, after all?

For completeness, these are the messages using ib700 with action "reset":

[   11.441964] systemd[1]: Reached target Shutdown.
[   11.442542] systemd[1]: Starting Final Step.
[   11.443075] systemd[1]: Reached target Final Step.
[   11.443599] systemd[1]: Starting Reboot...
[   11.445617] systemd[1]: Shutting down.
[   11.473895] systemd[1]: Failed to set timeout to 600s: Invalid argument
[   11.474649] ib700wdt: WDT device closed unexpectedly.  WDT will not stop!
[   11.497648] systemd-shutdown[1]: Sending SIGTERM to remaining processes...
[   11.500527] systemd-journald[148]: Received SIGTERM from PID 1 
(systemd-shutdow).
[   11.506153] systemd-shutdown[1]: Sending SIGKILL to remaining processes...
[   11.508942] systemd-shutdown[1]: Hardware watchdog 'IB700 WDT', version 1
[   11.510122] systemd-shutdown[1]: Unmounting file systems.
[   11.511108] systemd-shutdown[1]: Unmounting /dev/hugepages.
[   11.536126] systemd-shutdown[1]: Unmounting /sys/kernel/debug.
[   11.568089] systemd-shutdown[1]: Unmounting /dev/mqueue.
[   11.719123] EXT4-fs (vda3): re-mounted. Opts: (null)
[   11.722559] EXT4-fs (vda3): re-mounted. Opts: (null)
[   11.723643] EXT4-fs (vda3): re-mounted. Opts: (null)
[   11.724687] systemd-shutdown[1]: All filesystems unmounted.
[   11.725834] systemd-shutdown[1]: Deactivating swaps.
[   11.726946] systemd-shutdown[1]: All swaps deactivated.
[   11.728077] systemd-shutdown[1]: Detaching loop devices.
[   11.749468] systemd-shutdown[1]: All loop devices detached.
[   11.750649] systemd-shutdown[1]: Detaching DM devices.
[   11.751759] systemd-shutdown[1]: All DM devices detached.
[   11.766548] systemd-shutdown[1]: Rebooting.
[   11.767417] Unregister pv shared memory for cpu 0
[   11.767421] Unregister pv shared memory for cpu 3
[   11.767460] Unregister pv shared memory for cpu 1
[   11.769581] Unregister pv shared memory for cpu 2
[   11.770811] reboot: Restarting system
[   11.771454] reboot: machine restart

This looks similar to i6300esb with action "dump".

[   11.473895] systemd[1]: Failed to set timeout to 600s: Invalid argument
[   11.474649] ib700wdt: WDT device closed unexpectedly.  WDT will not stop!

Both watchdogs close unexpectedly, but i6300esb immediately resets the
machine, while ib700wdt allows the machine to continue the shutdown.

Peter


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