Date: Sat, 19 Oct 2002 23:49:05 -0400 (EDT) From: ahd@kew.com (Drew Derbyshire) To: stable@freebsd.org Subject: solid lockup at serial port accesss Message-ID: <20021020034905.C579515536@kendra.ne.client2.attbi.com>
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I am running FreeBSD 4.6.2-RELEASE-p2 on two similar Dell GX1 PII/350
machines each with a USR PCI modem. The machines have virtually
the same kernel configuration, except that one has 3 ISA ports
defined and the other 4.
(Other differences exist, for example different versions of a 2940
SCSI card, and one system has Maxtor ATA133 drives while the other
has WDC SCSI drives; the kernel includes sufficent support for both.)
On each machine, the PCI modem is moved to the first open sio device,
for example sio3 on the machine I included the boot log for below.
If the device is opened, for example a simple:
echo atz > /dev/cuaa3
The system hangs. Hard. Not even the carriage return gets printed.
I can't even switch virtual consoles.
It also did this with an ISA modem ~ two weeks ago.
What gives?
I'm building with the kernel debugger, but I wonder if I'll be able
to get into it.
*help*
-ahd-
-------------------------------------------------------------------------------
from pciconf -l -v
sio3@pci2:10:0: class=0x070002 card=0x00d312b9 chip=0x100812b9 rev=0x01 hdr=0x00
vendor = '3COM Corp, Modem Division (Formerly US Robotics)'
device = '3cp803598 USR 56k Internal Modem'
class = simple comms
subclass = UART
Copyright (c) 1992-2002 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
The Regents of the University of California. All rights reserved.
FreeBSD 4.6.2-RELEASE #1: Sun Sep 15 16:48:13 EDT 2002
ahd@pandora.hh.kew.com:/usr/scratch/obj/usr/src/sys/DELL_GX1
Timecounter "i8254" frequency 1193182 Hz
CPU: Pentium II/Pentium II Xeon/Celeron (347.67-MHz 686-class CPU)
Origin = "GenuineIntel" Id = 0x651 Stepping = 1
Features=0x183f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR>
real memory = 268435456 (262144K bytes)
config> q
avail memory = 257634304 (251596K bytes)
Preloaded elf kernel "kernel" at 0xc0382000.
Preloaded userconfig_script "/boot/kernel.conf" at 0xc038209c.
VESA: v2.0, 4096k memory, flags:0x0, mode table:0xc031d762 (1000022)
VESA: ATI MACH64
Pentium Pro MTRR support enabled
md0: Malloc disk
Using $PIR table, 9 entries at 0xc00fc670
apm0: <APM BIOS> on motherboard
apm: found APM BIOS v1.2, connected at v1.2
npx0: <math processor> on motherboard
npx0: INT 16 interface
pcib0: <Intel 82443BX (440 BX) host to PCI bridge> on motherboard
pci0: <PCI bus> on pcib0
pcib1: <Intel 82443BX (440 BX) PCI-PCI (AGP) bridge> at device 1.0 on pci0
pci1: <PCI bus> on pcib1
pci1: <ATI Mach64-GB graphics accelerator> at 0.0 irq 11
isab0: <Intel 82371AB PCI to ISA bridge> at device 7.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <Intel PIIX4 ATA33 controller> port 0xffa0-0xffaf at device 7.1 on pci0
ata0: at 0x1f0 irq 14 on atapci0
ata1: at 0x170 irq 15 on atapci0
uhci0: <Intel 82371AB/EB (PIIX4) USB controller> port 0xcce0-0xccff irq 11 at device 7.2 on pci0
usb0: <Intel 82371AB/EB (PIIX4) USB controller> on uhci0
usb0: USB revision 1.0
uhub0: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
chip1: <Intel 82371AB Power management controller> port 0x850-0x85f at device 7.3 on pci0
atapci1: <Promise TX2 ATA133 controller> port 0xcca0-0xccaf,0xccb8-0xccbb,0xccc0-0xccc7,0xccd0-0xccd3,0xccd8-0xccdf mem
0xff000000-0xff003fff irq 10 at device 13.0 on pci0
ata2: at 0xccd8 on atapci1
ata3: at 0xccc0 on atapci1
ahc0: <Adaptec 2940/DUAL Ultra SCSI adapter> port 0xc800-0xc8ff mem 0xff005000-0xff005fff irq 11 at device 14.0 on pci0
aic7895: Ultra Wide Channel A, SCSI Id=7, 32/253 SCBs
ahc1: <Adaptec 2940/DUAL Ultra SCSI adapter> port 0xc400-0xc4ff mem 0xff004000-0xff004fff irq 11 at device 14.1 on pci0
aic7895: Ultra Single Channel B, SCSI Id=7, 32/253 SCBs
pcib2: <DEC 21152 PCI-PCI bridge> at device 15.0 on pci0
pci2: <PCI bus> on pcib2
sio0: <3COM PCI FaxModem> port 0xdcf8-0xdcff irq 11 at device 10.0 on pci2
sio0: moving to sio3
sio3: type 16550A
xl0: <3Com 3c905B-TX Fast Etherlink XL> port 0xcc00-0xcc7f mem 0xff006000-0xff00607f irq 11 at device 17.0 on pci0
xl0: Ethernet address: 00:c0:4f:74:b8:56
miibus0: <MII bus> on xl0
xlphy0: <3Com internal media interface> on miibus0
xlphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
orm0: <Option ROMs> at iomem 0xc0000-0xc7fff,0xc8000-0xcc7ff,0xd0000-0xd7fff,0xd8000-0xda7ff on isa0
fdc0: <NEC 72065B or clone> at port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on isa0
fdc0: FIFO enabled, 8 bytes threshold
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
kbd0 at atkbd0
psm0: failed to get data.
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: model Generic PS/2 mouse, device ID 0
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
sio0: type 16550A
sio1: configured irq 3 not in bitmap of probed irqs 0
sio2 at port 0x3e8-0x3ef irq 7 on isa0
sio2: type 16550A
IP packet filtering initialized, divert enabled, rule-based forwarding enabled, default to deny, logging limited to 100 packets/entry
by default
ad0: 1222MB <WDC AC11200LS> [2484/16/63] at ata0-master UDMA33
ad4: 38172MB <MAXTOR 6L040J2> [77557/16/63] at ata2-master UDMA133
ad6: 38172MB <MAXTOR 6L040J2> [77557/16/63] at ata3-master UDMA133
acd0: CDROM <E-IDE CD-ROM CR-850E> at ata1-master UDMA33
Waiting 5 seconds for SCSI devices to settle
Mounting root from ufs:/dev/ad4s2a
cd0 at ahc1 bus 0 target 5 lun 0
cd0: <RICOH MP6200S 2.20> Removable CD-ROM SCSI-2 device
cd0: 3.300MB/s transfers
cd0: cd present [1 x 2048 byte records]
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