I have an IPC that periodially netboots an old -current, and I got the
following panic the other day while trying to boot it. The next
attempt worked fine. Is this something worth trying to debug?
Something that's likely already fixed? 

panic: me_alloc: all pmegs gone
data fault: pc=c5d69808 addr=c5d69808 ser=80<INVAL>
panic: kernel fault
halted

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    The Regents of the University of California.  All rights reserved.

NetBSD 1.2D (GENERIC) #0: Tue Apr  8 14:05:41 PDT 1997
    thorpej@lestat:/tmp_mnt/dracul/u5/snapshot/src/sys/arch/sparc/compile/GENERIC
real mem = 20918272
avail mem = 18247680
using 128 buffers containing 524288 bytes of memory
bootpath: /sbus0/le0
mainbus0 (root): Sun 4/40
cpu0 at mainbus0: MB86900/1A or L64801 @ 25 MHz, WTL3170/2 FPU
cpu0: 65536 byte write-through, 16 bytes/line, sw flush cache enabled
memreg0 at mainbus0 ioaddr 0xf4000000
clock0 at mainbus0 ioaddr 0xf2000000: mk48t02 (eeprom)
timer0 at mainbus0 ioaddr 0xf3000000 delay constant 10
auxreg0 at mainbus0 ioaddr 0xf7400000
zs0 at mainbus0 ioaddr 0xf1000000 pri 12, softpri 6
zs1 at mainbus0 ioaddr 0xf0000000 pri 12, softpri 6
fdc0 at mainbus0 ioaddr 0xf7200000 pri 11, softpri 4: chip 82072
fd0 at fdc0 drive 0: 1.44MB 80 cyl, 2 head, 18 sec
audio0 at mainbus0 ioaddr 0xf7201000 pri 13, softpri 4
sbus0 at mainbus0 ioaddr 0xf8000000: clock = 25 MHz
dma0 at sbus0 slot 0 offset 0x400000: rev 1
esp0 at sbus0 slot 0 offset 0x800000 pri 3: ESP100A, 25MHz, SCSI ID 7
scsibus0 at esp0: 8 targets
sd0 at scsibus0 targ 2 lun 0: <FUJITSU, M2684S-512, 2039> SCSI2 0/direct fixed
sd0: 507MB, 2380 cyl, 6 head, 72 sec, 512 bytes/sec
sd1 at scsibus0 targ 6 lun 0: <QUANTUM, EMPIRE_2100S, 1200> SCSI2 0/direct fixed
sd1: 2006MB, 3053 cyl, 12 head, 112 sec, 512 bytes/sec
le0 at sbus0 slot 0 offset 0xc00000 pri 5: address 08:00:20:0f:4e:25
le0: 8 receive buffers, 2 transmit buffers
cgsix0 at sbus0 slot 2 offset 0x0: SUNW,501-1672, 1152 x 900, rev 6 (console)
cgsix0: attached to /dev/fb
bwtwo0 at sbus0 slot 3 offset 0x0: SUNW,501-1561, 1152 x 900
mountroot: trying ffs...
mountroot: trying nfs...
nfs_boot: using network interface 'le0'
nfs_boot: client_addr=0xcec57735
nfs_boot: server_addr=0xcec57733
nfs_boot: hostname=euthanasia
root on 206.197.119.51:/usr/local/export/aspasia/root
root time: 0x334ca45c
WARNING: clock gained 101 days -- CHECK AND RESET THE DATE!
swap on 206.197.119.51:/usr/local/export/aspasia/swap
swap size: 0x10000 (blocks)
root file system type: nfs
init: copying out path `/sbin/init' 11