Date: Mon, 11 Aug 1997 12:15:29 -0500 (CDT) From: neal@pernet.net To: FreeBSD-gnats-submit@FreeBSD.ORG Subject: kern/4273: kernel page faults with heavy disk access with an ahc Message-ID: <199708111715.MAA00688@web.pernet.net> Resent-Message-ID: <199708111720.KAA17297@hub.freebsd.org>
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>Number: 4273
>Category: kern
>Synopsis: kernel page faults with heavy disk access with an ahc
>Confidential: no
>Severity: critical
>Priority: high
>Responsible: freebsd-bugs
>State: open
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Mon Aug 11 10:20:00 PDT 1997
>Last-Modified:
>Originator: Neal Rigney
>Organization:
PERnet Communications, Inc.
>Release: FreeBSD 2.2.2-RELEASE i386
>Environment:
My config file:
machine "i386"
cpu "I486_CPU"
ident WEB
maxusers 64
options CHILD_MAX=128
options OPEN_MAX=128
options "MAXDSIZ=(256*1024*1024)"
options "DFLDSIZ=(256*1024*1024)"
options INCLUDE_CONFIG_FILE # Include this file in kernel
config kernel root on sd0 dumps on sd0
options "COMPAT_43"
options SYSVSHM
options SYSVSEM
options SYSVMSG
options "MD5"
options USERCONFIG #boot -c editor
options VISUAL_USERCONFIG #visual boot -c editor
options INET #Internet communications protocols
pseudo-device ether #Generic Ethernet
pseudo-device loop #Network loopback device
pseudo-device bpfilter 4 #Berkeley packet filter
options FFS #Fast filesystem
options NFS #Network File System
options MSDOSFS #MS DOS File System
options PROCFS #Process filesystem
options NSWAPDEV=20
options QUOTA #enable disk quotas
controller scbus0 #base SCSI code
device sd0 #SCSI disks
device st0 #SCSI tapes
options SCSI_REPORT_GEOMETRY
pseudo-device pty 16 #Pseudo ttys - can go as high as 256
pseudo-device gzip #Exec gzipped a.out's
controller isa0
options "AUTO_EOI_1"
#options "AUTO_EOI_2"
options BOUNCE_BUFFERS
device sc0 at isa? port "IO_KBD" tty irq 1 vector scintr
options MAXCONS=16 # number of virtual consoles
controller fdc0 at isa? port "IO_FD1" bio irq 6 drq 2 vector fdintr
disk fd0 at fdc0 drive 0
device ed0 at isa? port 0x300 net irq 3 iomem 0xd8000 vector edintr
controller pci0
controller ahc1
device npx0 at isa? port "IO_NPX" iosiz 0x0 flags 0x0 irq 13 vector npxintr
dmesg output:
Copyright (c) 1992-1997 FreeBSD Inc.
Copyright (c) 1982, 1986, 1989, 1991, 1993
The Regents of the University of California. All rights reserved.
FreeBSD 2.2.2-RELEASE #0: Fri Aug 1 10:56:49 CDT 1997
root@web.pernet.net:/usr/src/sys/compile/WEB
CPU: AMD Am5x86 Write-Back (486-class CPU)
Origin = "AuthenticAMD" Id = 0x4f4 Stepping=4
Features=0x1<FPU>
real memory = 33554432 (32768K bytes)
avail memory = 30580736 (29864K bytes)
Probing for devices on PCI bus 0:
ahc0 <Adaptec 2940 SCSI host adapter> rev 0 int a irq 12 on pci0:13
ahc0: aic7870 Single Channel, SCSI Id=7, 16 SCBs
(ahc0:0:0): "QUANTUM FIREBALL_TM2110S 300X" type 0 fixed SCSI 2
sd0(ahc0:0:0): Direct-Access 2014MB (4124736 512 byte sectors)
sd0(ahc0:0:0): with 6810 cyls, 4 heads, and an average 151 sectors/track
chip0 <generic PCI bridge (vendor=1060 device=8881 subclass=0)> rev 4 on pci0:16
chip1 <generic PCI bridge (vendor=1060 device=886a subclass=1)> rev 13 on pci0:18:0
pci0:18:1: UMC, device=0x673a, class=storage (ide) [no driver assigned]
Probing for devices on the ISA bus:
sc0 at 0x60-0x6f irq 1 on motherboard
sc0: CGA/EGA <16 virtual consoles, flags=0x0>
ed0 at 0x300-0x31f irq 3 on isa
ed0: address 00:80:ad:11:e1:34, type NE2000 (16 bit)
fdc0 at 0x3f0-0x3f7 irq 6 drq 2 on isa
fdc0: NEC 765
fd0: 1.44MB 3.5in
npx0 on motherboard
npx0: INT 16 interface
WARNING: / was not properly dismounted.
>Description:
With heavy disk access, the kernel dies with a page fault while
in supervisor mode. It then gives "scb 0x0 timed out in dataout
phase".
Unfortunately, I have no way to hold the screen, and these messages scroll
too quickly to copy the entire ddb message. Here's the info I COULD copy:
address: 0x1717152d
supoervisor read
instruction pointer: 0x8:0xf01a2cc4 (the a might be a 9, my handwriting
was horrid)
I only got part of the stack pointer, not enough to be helpful.
the SCSI message that scrolls is:
SCSISIGI=0x4 SEQADDR=0x124 SEQ=0x12 STAT0=0x0 STAT1=0x3
About half the time, when the reboot finally occurs, the scsi drive doesn't
respond to the ahc's boot probe.
>How-To-Repeat:
I have a large zip file(110M) that reliably crashes the machine when
unzipping. However, it appears that any high amount of traffic will
do it. It's crashed several times when I wasn't around to help.
>Fix:
>Audit-Trail:
>Unformatted:
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