After rebuilding my -CURRENT system today I got a kernel crash on
reboot -- the first one in years :o)

When I reboot with my old kernel, savecore gives me this weird
error I can't explain:
savecore: /dev/wd0a not configured

Well, that's true.  My root directory is on /dev/wd1a, not wd0a.

I have a line in my kernel config setting the root dev to wd1a.
Do I also need a separate line specifying the dump dev?  That's
the only thing I can think of.  (GENERIC does not list such an
option, but I seem to recall something like that from years ago.)

Thanks.