Ok, I've reinstalled the system, and with softdeps enabled,
managed to: rebuild the kernel, do a 'make build', rebuild
XFree86, mozilla, and more.  No problems.  Code was CVS'd
two days ago.

The PC has the sources for 1.5.2 installed too.  I mounted
them over NFS on a Sparc Classic running 1.5.2 kernel,
1.5.1 world for a 'make build'.  Here 's the debugger message
and stack trace:

panic: softdep_pageiodone: resid < 0, vp 0xd7f97944 lbn 0x0 pcbp
0xd812e000
Stopped in pid 129 (nfsd) at cpu_Debugger+0x1:     ret
db> t
cpu_Debugger(c0290420,d7f97944,0,d812e000,c003ef08) at cpu_Debugger+0x1
softdep_pageiodone(c083ef08,c08ef08,1,d7be6a50,c056bb3c) at
softdep_pageiodone+0x159



Upon reboot, I get the following error when it tries to run nfsd:
panic: softdep_pageiodone: resid < 0, vp 0xd7c0e5a0 lbn 0x0 pcbp
0xd7c12000
Stopped in pid 127 (nfsd) at   cpu_Debugger+0x1:     ret


Hmm, I will now try booting single-user to see if I can get in
and turn off nfsd....and that worked.  Here's the dmesg for the
system.  Boots off of /dev/wd0a (rest of that disk is win2k),
and /usr is on /dev/wd0a, the whole disk.



NetBSD 1.5Y (BSD) #0: Sat Sep 29 18:37:30 EDT 2001
    root@bsd:/usr/src/src.bsd/sys/arch/i386/compile/BSD
cpu0: Intel Celeron (Mendocino) (686-class), 368.26 MHz
cpu0: I-cache 16 KB 32b/line 4-way, D-cache 16 KB 32b/line 2-way
cpu0: L2 cache 128 KB 32b/line 4-way
cpu0: features 183f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR>
cpu0: features 183f9ff<PGE,MCA,CMOV,FGPAT,PSE36,MMX,FXSR>
total memory = 254 MB
avail memory = 233 MB
using 3283 buffers containing 13132 KB of memory
BIOS32 rev. 0 found at 0xfdb70
mainbus0 (root)
pci0 at mainbus0 bus 0: configuration mode 1
pci0: i/o space, memory space enabled
pchb0 at pci0 dev 0 function 0
pchb0: Intel 82810 Memory Controller Hub (rev. 0x03)
agp0 at pchb0: aperture at 0xe8000000, size 0x4000000
vga1 at pci0 dev 1 function 0: Intel 82810 Graphics Controller (rev. 0x03)
wsdisplay0 at vga1: console (80x25, vt100 emulation)
ppb0 at pci0 dev 30 function 0: Intel 82801AA Hub-to-PCI Bridge (rev. 0x02)
pci1 at ppb0 bus 1
pci1: i/o space, memory space enabled
rtk0 at pci1 dev 11 function 0: RealTek 8139 10/100BaseTX
rtk0: interrupting at irq 10
rtk0: Ethernet address 00:50:bf:0a:a0:f0
ukphy0 at rtk0 phy 7: Generic IEEE 802.3u media interface
ukphy0: OUI 0x000000, model 0x0000, rev. 0
ukphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
siop0 at pci1 dev 15 function 0: Symbios Logic 53c825 (fast wide scsi)
siop0: interrupting at irq 9
scsibus0 at siop0: 16 targets, 8 luns per target
pcib0 at pci0 dev 31 function 0
pcib0: Intel 82801AA LPC Interface Bridge (rev. 0x02)
pciide0 at pci0 dev 31 function 1: Intel 82801AA IDE Controller (ICH) (rev. 0x02)
pciide0: bus-master DMA support present
pciide0: primary channel wired to compatibility mode
wd0 at pciide0 channel 0 drive 0: <Maxtor 90720D5>
wd0: drive supports 16-sector PIO transfers, LBA addressing
wd0: 6869 MB, 13957 cyl, 16 head, 63 sec, 512 bytes/sect x 14068656 sectors
wd0: 32-bit data port
wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 2 (Ultra/33)
pciide0: primary channel interrupting at irq 14
wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 2 (Ultra/33) (using DMA data transfers)
pciide0: secondary channel wired to compatibility mode
atapibus0 at pciide0 channel 1: 2 targets
cd0 at atapibus0 drive 0: <TOSHIBA CD-ROM XM-6202BD, , 1119> type 5 cdrom removable
cd0: 32-bit data port
cd0: drive supports PIO mode 4, DMA mode 2
wd1 at pciide0 channel 1 drive 1: <QUANTUM FIREBALL CR8.4A>
wd1: drive supports 16-sector PIO transfers, LBA addressing
wd1: 8063 MB, 16383 cyl, 16 head, 63 sec, 512 bytes/sect x 16514064 sectors
wd1: 32-bit data port
wd1: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 2 (Ultra/33)
pciide0: secondary channel interrupting at irq 15
cd0(pciide0:1:0): using PIO mode 4, DMA mode 2 (using DMA data transfers)
wd1(pciide0:1:1): using PIO mode 4, Ultra-DMA mode 2 (Ultra/33) (using DMA data transfers)
uhci0 at pci0 dev 31 function 2: Intel 82801AA USB Controller (rev. 0x02)
uhci0: interrupting at irq 9
usb0 at uhci0: USB revision 1.0
uhub0 at usb0
uhub0: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
auich0 at pci0 dev 31 function 5: i82801AA (ICH) AC-97 Audio
auich0: interrupting at irq 10
auich0: Crystal CS4299 codec; headphone, 20 bit DAC, 18 bit ADC, Spatializer 3D
audio0 at auich0: full duplex, mmap, independent
isa0 at pcib0
com0 at isa0 port 0x3f8-0x3ff irq 4: ns16550a, working fifo
com1 at isa0 port 0x2f8-0x2ff irq 3: ns16550a, working fifo
pckbc0 at isa0 port 0x60-0x64
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0: console keyboard, using wsdisplay0
lpt0 at isa0 port 0x378-0x37b irq 7
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: no ISA Plug 'n Play devices found
apm0 at mainbus0: Power Management spec V1.2
biomask fb65 netmask ff65 ttymask ffe7
scsibus0: waiting 2 seconds for devices to settle...
cd1 at scsibus0 target 4 lun 0: <, CRW620, 1.00> SCSI2 5/cdrom removable
cd1: async, 8-bit transfers
ums0 at uhub0 port 1 configuration 1 interface 0
ums0: Microsoft Microsoft IntelliMouse\M-. Optical, rev 1.10/1.21, addr 2, iclass 3/1
ums0: 5 buttons and Z dir.
wsmouse0 at ums0 mux 0
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)
wsmux1: connecting to wsdisplay0


Thanks!

Brian