I thought this was just a problem with the oct 16 copy I had, since I
knew that was when the VFS layer was in severe flux, but I've reproduced
it several times afterwards with an dec 5 copy as well.
The following appears to semi-reliably trigger the abovementioned error
message:
make buildworld/quickworld
make buildkernel KERNCONF=DOOM
make installkernel KERNCONF=DOOM
make installworld
It appears to most commonly happen during buildkernel, but I'm not
entirely sure.
The message in the subject pops up regularly, everything related to disk
seems to grind to a halt, and I'm unable to shut down the box in a
normal fashion. This is on a playbox, so if you're unable to reproduce
this, I'll be happy to assist in trying to find the bug, given good
enough instructions for how to proceed.