[PATCH v2] reboot: Backup orderly_poweroff

Ingo Molnar mingo at kernel.org
Fri Jan 15 02:14:59 PST 2016

* One Thousand Gnomes <gnomes at lxorguk.ukuu.org.uk> wrote:

> > If kernel_power_off() is called then the system should power off. No ifs and 
> > whens.
> Even if it doesn't the watchdog should kill it. 
> That is broken on some platforms on the watchdog side as the
> watchdog shuts down during our power off callbacks - because the system
> firmware is too stupid to reset the watchdog as it powers back up (so
> keeps rebooting).
> If you watchdog and firmware function properly you shouldn't even have to
> care if you crash during the kernel power off.

That's a good point as well - if the system is 'stuck' for some notion of stuck, 
then watchdog drivers can help.

Here it's unclear whether user-space even called the sys_reboot() system call.



More information about the linux-arm-kernel mailing list