this is copied by hand, so there may be mistakes..

panic: pagedaemon: clean anon page without backing store?

stack trace gives me:
_Debugger(f031cba4,12,f226d8a0,f21ebf50,f01e9fb5) at _Debugger+0x4
_panic(f01e9cfe,f03201ac,f0309f04,f031cca8,f0310e88) at _panic+0x55
_uvmpd_scan_inactive(f0265888) at _uvmpd_scan_inactive+0x1c5
_uvmpd_scan(0,f012fd04,0,f21e6f94,f012fd0c) at _uvmpd_scan+0x7b
_uvm_pageout(f0296ee8,f010034f,0,f21dc444,0) at _uvm_pageout+0x12f
_start_pagedaemon(0) at _start_pagedaemon+0x8
Bad frame pointer: 0xf0296ee8

I can reproduce this at will by trying to run the coda5_server
package on NetBSD 1.4.

dmesg output follows:
NetBSD 1.4_BETA (ALBATROSS) #1: Thu Apr 29 22:20:06 EDT 1999
    aidan@albatross.kublai.com:/usr/local/sup/src/sys/arch/i386/compile/ALBATROSS
cpu0: family 4 model 3 step 5
cpu0: Intel 486DX2 (486-class)
real mem  = 16384000
avail mem = 13352960
using 225 buffers containing 921600 bytes of memory
mainbus0 (root)
isa0 at mainbus0
ahc0 at isa0 port 0x1c00-0x1cff irq 15: Adaptec AHA-284x SCSI (BIOS enabled)
ahc0: aic7770 >= Rev E, Single Channel, SCSI Id=7, 4 SCBs
scsibus0 at ahc0 channel 0: 8 targets, 8 luns per target
ahc0: target 0 synchronous at 10.0MHz, offset = 0xf
sd0 at scsibus0 targ 0 lun 0: <Quantum, XP31070W, L912> SCSI2 0/direct fixed
sd0: 1075MB, 3907 cyl, 5 head, 112 sec, 512 bytes/sect x 2203480 sectors
ne1 at isa0 port 0x300-0x31f irq 10
ne1: NE2000 Ethernet
ne1: Ethernet address 00:40:33:2a:9e:c8
com0 at isa0 port 0x3f8-0x3ff irq 4: ns16550a, working fifo
wdc0 at isa0 port 0x1f0-0x1f7 irq 14
wd0 at wdc0 channel 0 drive 0: <WDC AC31600H>
wd0: drive supports 16-sector pio transfers, lba addressing
wd0: 1549MB, 3148 cyl, 16 head, 63 sec, 512 bytes/sect x 3173184 sectors
wd0: 32-bits data port
wd0: drive supports PIO mode 4, DMA mode 2
vga0 at isa0 port 0x3b0-0x3df iomem 0xa0000-0xbffff
wsdisplay0 at vga0: console (80x25, vt100 emulation)
sb0 at isa0 port 0x220-0x237 irq 5 drq 1: dsp v3.01
midi0 at sb0: <SB MIDI UART>
audio0 at sb0: half duplex
opl0 at sb0: model OPL2
midi1 at opl0: <SB Yamaha OPL2>
pckbc0 at isa0 port 0x60-0x64
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0: console keyboard
pcppi0 at isa0 port 0x61
sysbeep0 at pcppi0
isapnp0 at isa0 port 0x279: ISA Plug 'n Play device support
npx0 at isa0 port 0xf0-0xff: using exception 16
fdc0 at isa0 port 0x3f0-0x3f7 irq 6 drq 2
fd0 at fdc0 drive 0: 1.44MB, 80 cyl, 2 head, 18 sec
isapnp0: read port 0x20b
isapnp0: <SupraExpress 288i PnP Modem, SUP1310, SUP1320, > port 0x2f8/8 irq 3 not configured
biomask c040 netmask c440 ttymask c442
wscons: wskbd0 glued to wsdisplay0 (console)
WARNING: old BSD partition ID!
boot device: wd0
root on wd0a dumps on wd0b
root file system type: ffs
wsdisplay0: screen 1 added (80x25, vt100 emulation)
wsdisplay0: screen 2 added (80x25, vt100 emulation)
wsdisplay0: screen 3 added (80x25, vt100 emulation)
wsdisplay0: screen 4 added (80x25, vt100 emulation)

I can post my kernel config as well, if it matters..  The kernel is
built from a 4/28 source tree.

Let me know if there's any more info you want..
--aidan