I've just brought up the recent NetBSD snapshot on an AlphaStation
DS-20, and it seems as if it may have some dislike for the siop
(Symbios 53c875) controller. While unpacking a large tar archive
and simultaneously making a package in pkgsrc, the controller
wedged. The kernel was continuously printing a message indicating
a resource shortage, and that was basically it for the machine.
(The disk was the root disk.)

Has anyone else seen this? Any thoughts on what the problem might be?

dmesg appended.

cjs
-- 
Curt Sampson  <cjs@cynic.net>   +81 90 7737 2974   http://www.netbsd.org
    Don't you know, in this new Dark Age, we're all light.  --XTC

[ using 518744 bytes of netbsd ELF symbol table ]
consinit: not using prom console
Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001
    The NetBSD Foundation, Inc.  All rights reserved.
Copyright (c) 1982, 1986, 1989, 1991, 1993
    The Regents of the University of California.  All rights reserved.

NetBSD 1.5ZA (GENERIC) #0: Sun Dec 23 00:08:54 PST 2001
    chs@spanky:/build/obj/build/src/sys/arch/alpha/compile/GENERIC
AlphaServer DS20 500 MHz, s/n NI94406606
8192 byte page size, 1 processor.
total memory = 2048 MB
(2760 KB reserved for PROM, 2045 MB used by NetBSD)
avail memory = 1898 MB
using 13102 buffers containing 102 MB of memory
mainbus0 (root)
cpu0 at mainbus0: ID 0 (primary), 21264-4
cpu0: Architecture extensions: 303<PAT,MVI,FIX,BWX>
tsc0 at mainbus0: 21272 Core Logic Chipset, Cchip rev 0
tsc0: 8 Dchips, 2 memory buses of 32 bytes
tsc0: arrays present: 1024MB, 1024MB (split), 0MB, 0MB, Dchip 0 rev 1
tsp0 at tsc0
pci0 at tsp0 bus 0
pci0: i/o space, memory space enabled, rd/line, rd/mult, wr/inv ok
sio0 at pci0 dev 5 function 0: Contaq Microsystems 82C693 PCI-ISA Bridge (rev. 0x00)
pciide0 at pci0 dev 5 function 1: Cypress 82C693 IDE Controller (rev. 0x00)
pciide0: bus-master DMA support present
pciide0: primary channel wired to compatibility mode
pciide0: disabling primary channel (no drives)
pciide1 at pci0 dev 5 function 2: Cypress 82C693 IDE Controller (rev. 0x00)
pciide1: hardware does not support DMA
pciide1: primary channel wired to compatibility mode
pciide1: disabling primary channel (no drives)
ohci0 at pci0 dev 5 function 3: Contaq Microsystems 82C693 PCI-ISA Bridge (rev. 0x00)
ohci0: interrupting at isa irq 10
ohci0: OHCI version 1.0, legacy support
usb0 at ohci0: USB revision 1.0
uhub0 at usb0
uhub0: Contaq Microsys OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
vga0 at pci0 dev 7 function 0: Texas Instruments TVP4020 Permedia 2 (rev. 0x01)
wsdisplay0 at vga0 (kbdmux ignored): console (80x25, vt100 emulation)
de0 at pci0 dev 8 function 0
de0: interrupting at dec 6600 irq 27
de0: DEC DE500-BA 21143 [10-100Mb/s] pass 3.0
de0: address 08:00:2b:c4:61:a5
de0: enabling 10baseT port
isp0 at pci0 dev 9 function 0
isp0: interrupting at dec 6600 irq 23
scsibus0 at isp0: 16 targets, 8 luns per target
isa0 at sio0
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 (mux ignored): console keyboard, using wsdisplay0
pms0 at pckbc0 (aux slot)
pckbc0: using irq 12 for aux slot
wsmouse0 at pms0 (mux ignored)
lpt0 at isa0 port 0x3bc-0x3bf irq 7
pcppi0 at isa0 port 0x61
midi0 at pcppi0: PC speaker
spkr0 at pcppi0
isabeep0 at pcppi0
fdc0 at isa0 port 0x3f0-0x3f7 irq 6 drq 2
fd0 at fdc0 drive 0: 1.44MB, 80 cyl, 2 head, 18 sec
mcclock0 at isa0 port 0x70-0x71: mc146818 or compatible
tsp1 at tsc0
pci1 at tsp1 bus 0
pci1: i/o space, memory space enabled, rd/line, rd/mult, wr/inv ok
ppb0 at pci1 dev 7 function 0: Digital Equipment DECchip 21152 PCI-PCI Bridge (rev. 0x03)
pci2 at ppb0 bus 2
pci2: i/o space, memory space enabled, rd/line, wr/inv ok
siop0 at pci2 dev 0 function 0: Symbios Logic 53c875 (ultra-wide scsi)
siop0: using on-board RAM
siop0: interrupting at dec 6600 irq 47
scsibus1 at siop0: 16 targets, 8 luns per target
siop1 at pci2 dev 1 function 0: Symbios Logic 53c875 (ultra-wide scsi)
siop1: using on-board RAM
siop1: interrupting at dec 6600 irq 46
scsibus2 at siop1: 16 targets, 8 luns per target
de1 at pci2 dev 2 function 0
de1: interrupting at dec 6600 irq 45
de1: 21140A [10-100Mb/s] pass 2.2
de1: address 00:06:2b:01:21:20
de1: enabling 10baseT port
isp1 at pci1 dev 8 function 0
isp1: interrupting at dec 6600 irq 43
scsibus3 at isp1: 16 targets, 8 luns per target
scsibus0: waiting 2 seconds for devices to settle...
sd0 at scsibus0 target 8 lun 0: <DEC, HSZ70, V73Z> SCSI2 0/direct fixed
sd0: 43371 MB, 26279 cyl, 20 head, 169 sec, 512 bytes/sect x 88824180 sectors
sd1 at scsibus0 target 8 lun 1: <DEC, HSZ70, V73Z> SCSI2 0/direct fixed
sd1: 43371 MB, 26279 cyl, 20 head, 169 sec, 512 bytes/sect x 88824180 sectors
sd2 at scsibus0 target 8 lun 2: <DEC, HSZ70, V73Z> SCSI2 0/direct fixed
sd2: 43371 MB, 26279 cyl, 20 head, 169 sec, 512 bytes/sect x 88824180 sectors
sd0: sync (50.0ns offset 8), 16-bit (40.000MB/s) transfers, tagged queueing
sd1: sync (50.0ns offset 8), 16-bit (40.000MB/s) transfers, tagged queueing
sd2: sync (50.0ns offset 8), 16-bit (40.000MB/s) transfers, tagged queueing
scsibus1: waiting 2 seconds for devices to settle...
cd0 at scsibus1 target 5 lun 0: <DEC, RRD47   (C) DEC, 1206> SCSI2 5/cdrom removable
cd0: sync (100.0ns offset 16), 8-bit (10.000MB/s) transfers
scsibus2: waiting 2 seconds for devices to settle...
sd3 at scsibus2 target 0 lun 0: <DEC, RZ2DD-LS (C) DEC, 0306> SCSI2 0/direct fixed
sd3: 8678 MB, 5273 cyl, 20 head, 168 sec, 512 bytes/sect x 17773524 sectors
sd3: sync (50.0ns offset 15), 16-bit (40.000MB/s) transfers, tagged queueing
scsibus3: waiting 2 seconds for devices to settle...
scsibus3 target 0 lun 0: <DEC, TL800    (C) DEC, 0409> SCSI3 8/changer removable not configured
st0 at scsibus3 target 4 lun 0: <DEC, TZ89     (C) DEC, 2150> SCSI2 1/sequential removable
st0: drive empty
st0: sync (100.0ns offset 8), 16-bit (20.000MB/s) transfers
WARNING: can't figure what device matches "SCSI 1 2001 0 0 0 0 0"
root device: <3>stray isa irq 1
stray isa irq 1
s<3>stray isa irq 1
stray isa irq 1
d<3>stray isa irq 1; stopped logging
3
dump device (default sd3b):
file system (default generic):
root on sd3a dumps on sd3b
root file system type: ffs