this is what i've got in the motherboard i'm trying to get running in my unwell cpu server. using your 9pccd.gz (just trying to get root from *anywhere*, so i can see the disks), i get two of these:
panic: ilockdepth 1, last lock 0x0 at 0x0, sched called from 0xf0108802 right after i say root from tcp.
