Re: 10.99.7 panic: defibrillate

[Taylor R Campbell <riastradh%NetBSD.org@localhost>]

> Date: Sun, 13 Aug 2023 06:16:53 +0000
> From: Taylor R Campbell <riastradh%NetBSD.org@localhost>
> 
> > Date: Sun, 13 Aug 2023 08:03:00 +0200
> > From: Thomas Klausner <wiz%NetBSD.org@localhost>
> > 
> > So it happened again, no bulk build this time, just qt5-qtwebengine in
> > a sandbox.
> > 
> > panic: cpu0: softints stuck for 16 seconds
> 
> You could try `no options HEARTBEAT' in your kernel and see if
> anything is stuck after a day of builds -- the same crash commands
> might show something is up.

Or, better, without rebuilding a kernel:

sysctl -w kern.heartbeat.max_period=300

to extend the period to five minutes (300 seconds), or set it to 0 to
disable the checks at runtime.

Another diagnostic that might be helpful -- during load:

# lockstat -o lockstat.out sleep 15

and share the output.  If it fails, try a lower sleep time like 10 or
5 or 1.