On Mon, Nov 30, 2020 at 11:03:29PM +0200, Konstantin Belousov wrote:
> ...
> > I suppose I will be commenting out that DIAGNOSTIC option now.... :-}
> 
> Try to just set debug.vmem_check to 0 and see if it helps.
> ...

OK; I rebooted the new(er) laptop with the previous kernel (that was
built with "option DIAGNOSTIC") and reproduced the issue:

--- albert.catwhisker.org ping statistics ---
37 packets transmitted, 37 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 0.451/13.832/178.867/41.904 ms

Then:

g1-216(13.0-C)[2] sudo sysctl debug.vmem_check
Password:
debug.vmem_check: 1
g1-216(13.0-C)[3] sudo sysctl debug.vmem_check=0
debug.vmem_check: 1 -> 0

On recheck:

--- albert.catwhisker.org ping statistics ---
60 packets transmitted, 60 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 0.411/0.551/1.051/0.084 ms

which looks pretty good to me.

Thank you, Konstantin! :-)

Peace,
david
-- 
David H. Wolfskill                              da...@catwhisker.org
There's no point in asking Trump "Sir, have you no decency?" -- it is
already well established that neither he nor his enablers have any.

See http://www.catwhisker.org/~david/publickey.gpg for my public key.

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