Re: [Watchdog-devel] sigterm-delay is always waiting

Dear Paul

Sorry for the misunderstanding, my bad english dosent help.

I try it again.

I try to explain it like i understand it thanks to your help.

With sigterm_delay set to 500, my Watchdog gets triggered and tries to reboot the System so it send's SIGTERMs to all processes. Lets assume they all have done a clean shutdown after 120s expcept for systemd because its in a cgroup, so in my understanding it should not be needed to wait the rest of the sigterm_delay. And as far as i understood you it should then try to set the reset time as short as possible.

I hope i got it clearer, thanks for your patience!

Best regards
Marco

> Gesendet: Freitag, 17. Januar 2020 um 13:36 Uhr
> Von: "Paul Crawford" <ps...@sa...>
> An: wat...@li...
> Betreff: Re: [Watchdog-devel] sigterm-delay is always waiting
>
> Dear Marco,
>
> > I am sorry for my HTML respone, first time i use a mailinglist and my web client got me, shame on me.
> >
> > But back to the topic.
> >
> > I see your Points about systemd and cgroups, this make sense, thanks for clarification.
> > To sum it up, watchdog SIGTERM/SIGKILL all process he can and then try to set the reset timer as short as possible.
> > If it should be that way, how does he determine when to do this and how can i debug why my watchdog is waiting the whole sigterm_delay? Or what i am missing?
>
> The sigterm delay is a timber between sending out SIGTERM to "politely"
> ask process to stop and then the sending out of SIGKILL just before the
> hardware timer is used to trigger a reboot. So what you configure for
> this will normally be used (except for occasions when the watchdog tries
> a hard reset or has locked up and the hardware times-out to the same
> effect).
>
> My apologies if I do not understand your problem correctly, but if you
> have a delay configured, for example, 5 seconds, why do expect it to do
> something before this time id over?
>
> Regards,
> Paul
>
> > Thanks for your patience
> >
> > Best regards
> > Marco
>
> --
>   Dr. Paul S. Crawford
>   c/o Satellite Station
>   University of Dundee
>   Small's Wynd, Dundee, DD1 4HN
>   Email: ps...@sa...
>   Tel: +44 (0)1382 38 4687
>   The University of Dundee is a Scottish Registered Charity, No. SC015096
>
>
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