On Tue, 7 Dec 2021, Greg A. Woods wrote:
So I've got a couple of old but important machines (Xen amd64 domUs)
running NetBSD-5, and I've finally decided that I'm reasonably well
enough prepared to try upgrading them.
However it seems a "modern" (9.99.81, -current from about 2021-03-10)
kernel with COMPAT_40 isn't able to run some of the userland on those
systems.
Is this something that should work?
I believe that this should work.
If it should I think it would make the upgrade much easier as I could
then plop down the new userland and run etcupdate. (there are of course
alternative ways to do the upgrade, eased by the fact they are domUs (*))
The most immediate problems I noticed are with networking. ifconfig -a
returns without printing anything, and trying to enable IPF crashes:
Without looking at the details of your backtrace, the issue with
ifconfig(8) could be related to PRs kern/54150 and/or kern/54151.
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