Re: Watchdog timer and slow shutdown

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On Wed, 2018-01-24 at 14:01 -0700, stan wrote:
> On Wed, 24 Jan 2018 12:03:54 +0000
> Patrick O'Callaghan <pocallaghan@xxxxxxxxx> wrote:
> 
> > On rebooting today my system took an age to shutdown, for no apparent
> > reason but possibly related to NFS mounts.
> 
> I run a daemon to feed entropy into the kernel pool.  It sleeps most of
> the time, waking up only when the pool drops below a threshold.  If I
> shutdown while it is sleeping, it takes a minute and a half before
> systemd sends it a kill -9, unless it wakes up in the interval.  If I
> kill the process before shutdown, there is no wait.  Perhaps
> something like this is happening to you (the NFS mounts?).

This would imply that the daemon isn't responding to a TERM signal,
hence the timeout. I thought NFS did obey TERM, but a glance at the man
pages doesn't show any reference to signals, so the answer must remain
a mystery.

poc
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