Date: Sat, 05 Aug 2000 02:11:16 -0600 From: Allen Campbell <allenc@campbell.cwx.net> To: stable@FreeBSD.ORG Subject: Kernel bug or bad hardware? Message-ID: <398BCC24.3DE06DE8@verinet.com>
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I am experiencing infrequent, spontaneous panics of a 4.0-STABLE
machine. The reboots occur while the system is under light load.
When the panic occurs the following output is generated by a kernel
trap. I have witnessed this on three occasions. On the most recent
I bolted to the server and hit PAUSE to preserve the output long
enough to copy it verbatim.
ad0: WRITE command timeout - resetting
ata0: resetting devices .. done
ad0: timeout waiting for DRQad-106100774: soft error ECC corrected
ad-106100774: timeout waiting for DRQdevstat_end_transaction: HELP!!
busy count for (?CA1062206520 is < 0 (-1061721857)!
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x60
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc0173e8c
stack pointer = 0x10:0xc0290aec
frame pointer = 0x10:0xc0290b1c
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process = Idle
interrupt mask = bio
trap number = 12
panic: page fault
syncing disks...
At this point the machine boots, fsck runs to clean up the disks and
the machine runs normally. On each occasion the output began with:
`ad0: WRITE command timeout - resetting'. This makes me think the
problem is not related to faulty memory, but possibly a bad IDE disk
or a kernel bug. Other than this problem the machine runs perfectly.
uname -a:
FreeBSD const. 4.0-STABLE FreeBSD 4.0-STABLE #0: Sat Jul 1 21:46:49 MDT
2000
allenc@pragma.:/usr/src/sys/compile/CONST i386
My most recent STABLE update was performed to obtain fixes for the
TCP/IP ICMP bugs reported recently.
dmesg output:
Copyright (c) 1992-2000 The FreeBSD Project.
Copyright (c) 1982, 1986, 1989, 1991, 1993
The Regents of the University of California. All rights reserved.
FreeBSD 4.0-STABLE #0: Sat Jul 1 21:46:49 MDT 2000
allenc@pragma.:/usr/src/sys/compile/CONST
Timecounter "i8254" frequency 1193182 Hz
CPU: AMD Am5x86 Write-Back (486-class CPU)
Origin = "AuthenticAMD" Id = 0x4f4 Stepping = 4
Features=0x1<FPU>
real memory = 67108864 (65536K bytes)
config> di psm0
config> en ed0
config> po ed0 0x300
config> ir ed0 11
config> iom ed0 0xd8000
config> f ed0 0
config> q
avail memory = 61964288 (60512K bytes)
Preloaded elf kernel "kernel" at 0xc0326000.
Preloaded userconfig_script "/boot/kernel.conf" at 0xc032609c.
md0: Malloc disk
npx0: <math processor> on motherboard
npx0: INT 16 interface
pcib0: <SiS 85c496> on motherboard
pci0: <PCI bus> on pcib0
pci0: <S3 ViRGE DX/GX graphics accelerator> at 11.0 irq 10
dc0: <82c169 PNIC 10/100BaseTX> port 0x6000-0x60ff mem
0xf4000000-0xf40000ff irq 12 at device 13.0 on pci0
dc0: Ethernet address: 00:a0:cc:54:e6:b9
miibus0: <MII bus> on dc0
ukphy0: <Generic IEEE 802.3u media interface> on miibus0
ukphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
ncr0: <ncr 53c810a fast10 scsi> port 0x6100-0x61ff mem
0xf4001000-0xf40010ff irq 12 at device 15.0 on pci0
ncr0: driver is using old-style compatability shims
isa0: <ISA bus> on motherboard
fdc0: <NEC 765 or clone> at port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on isa0
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
ata0 at port 0x1f0-0x1f7,0x3f6 irq 14 on isa0
ata1 at port 0x170-0x177,0x376 irq 15 on isa0
atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on
isa0
sc0: <System console> on isa0
sc0: VGA <16 virtual consoles, flags=0x200>
sio0 at port 0x3f8-0x3ff irq 4 on isa0
sio0: type 16550A
sio1 at port 0x2f8-0x2ff irq 3 on isa0
sio1: type 16550A
ppc0: <Parallel port> at port 0x378-0x37f irq 7 on isa0
ppc0: Generic chipset (NIBBLE-only) in COMPATIBLE mode
ppbus0: IEEE1284 device found /NIBBLE/ECP
Probing for PnP devices on ppbus0:
ppbus0: <Hewlett-Packard HP LaserJet 2100 Series> PJL,MLC,PCL,PCLXL
ppi0: <Parallel I/O> on ppbus0
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
plip0: <PLIP network interface> on ppbus0
ed0 at port 0x300-0x31f iomem 0xd8000 irq 11 drq 0 on isa0
ed0: address 00:80:29:67:e0:a3, type NE2000 (16 bit)
IP packet filtering initialized, divert enabled, rule-based forwarding
disabled, default to deny, logging disabled
DUMMYNET initialized (000608)
ncp_load: [210-213]
IP Filter: initialized. Default = pass all, Logging = disabled
IP Filter: v3.3.8
ad0: 6149MB <WDC AC26400B> [13328/15/63] at ata0-master using BIOSPIO
(null): MODE_SENSE_BIG command timeout - resetting
ata1: resetting devices .. done
ata1-master: no status, reselecting device
(null): read data overrun 29/1
(null): MODE_SENSE_BIG command timeout - resetting
ata1: resetting devices .. done
ata1-master: no status, reselecting device
(null): read data overrun 29/0
acd0: CDROM <CD-ROM CDR-S1> at ata1-master using BIOSPIO
Waiting 15 seconds for SCSI devices to settle
sa0 at ncr0 bus 0 target 2 lun 0
sa0: <HP T4000s 1.10> Removable Sequential Access SCSI-2 device
sa0: 3.300MB/s transfers
cd0 at ncr0 bus 0 target 6 lun 0
cd0: <PLEXTOR CD-R PX-W8220T 1.01> Removable CD-ROM SCSI-2 device
cd0: 10.000MB/s transfers (10.000MHz, offset 8)
cd0: cd present [320584 x 2048 byte records]
Mounting root from ufs:/dev/ad0s2a
--
Allen Campbell | Lurking at the bottom of the
allenc@verinet.com | gravity well, getting old.
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