Hard lockup on RockPro64 with NetBSD 9

[John Klos <john%ziaspace.com@localhost>]

Hi,

Is anyone else having lockups on the RockPro64 with heavy network 
activity? I have a nice heat sink and fan and can run CPU intensive things 
day and night - compiling, transcoding via ffmpeg, et cetera - but 
transferring lots of data causes a hard lockup eventually.

I can't seem to get in to the kernel debugger. I have no problems getting 
in to it when the machine isn't locked up, but once it's frozen, that's 
it - no response whatsoever.

I wondered if it's an issue with awge*, so I tested with a USB axe*, and 
it locked up, too, after a few dozen gigabytes of network transfer.

This is with NetBSD 9 from 24-December and from 1-January.

Ideas?

John