Date: Tue, 6 Feb 2001 15:28:27 -0800 (PST) From: diomed@mac.com To: freebsd-gnats-submit@FreeBSD.org Subject: kern/24913: Random panics related to ppp and high CPU activity. Message-ID: <200102062328.f16NSR808259@freefall.freebsd.org>
next in thread | raw e-mail | index | archive | help
>Number: 24913
>Category: kern
>Synopsis: Random panics related to ppp and high CPU activity.
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Tue Feb 06 15:30:01 PST 2001
>Closed-Date:
>Last-Modified:
>Originator: James Pye
>Release: 4.2-STABLE
>Organization:
>Environment:
FreeBSD cocytus.2y.net 4.2-STABLE FreeBSD 4.2-STABLE #0: Tue Feb 6 11:09:21 MST 2001
diomed@cocytus.2y.net:/usr/src/sys/compile/COCYTUS i386
>Description:
Basic system info: 4.2-STABLE on a AMD K6-2 500 w/ a soyo motherboard, 128megs of RAM, USB keyboard&mouse; linksys etherfast nic; USR external modem; Quantum Fireball 10GB, Samsung DVD-ROM.. see my dmesg below for more info.
This appears to be one of those annoying random bugs, it seems to occur when there's a PPP connection through ppp and high CPU activity(dnetc is normally enough to make it eventually panic).
The ONLY time it will panic is if PPP is running, I am sure that this is related because everytime I am able to see the panic info, PPP is the current process.
Now, oddly enough, I didn't have this problem while running 4.2-RELEASE a while ago, so I attempted to find a tempory work-around for the bug and degrade back to 4.2-RELEASE.
This did not work as I thought it would. It still eventually locked upped while running ppp&dnetc.
anyways, here is fun stuff:
I did a nm /kernel | grep, and the instruction pointer appeared to be in T poll, well it didn't point directly to it, but I removed the some of the ending chars, and it finally came up with T poll, so this may not be accurate, I'm not sure about it.
kernel panic info:
Fata trap 12 : page fault while in kernel mode
fault virtual address = 0x1
fault cod = supervisor read, page not pressent
instruction pointer = 0x8:0xc016b45a
stack pointer = 0x10:0xc93d2dac
frame pointer = 0x10:0xc93d2dcc
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def 32 1, gran 1
processor eflage - interrupt enabled, resume, IOPL=0
current process = 2495(ppp)
interrupt mask = none
trap number 12
panic : page fault
dmesg info:
Copyright (c) 1992-2000 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 4.2-STABLE #0: Tue Feb 6 11:09:21 MST 2001
diomed@cocytus.2y.net:/usr/src/sys/compile/COCYTUS
Timecounter "i8254" frequency 1193182 Hz
CPU: AMD-K6(tm) 3D processor (501.14-MHz 586-class CPU)
Origin = "AuthenticAMD" Id = 0x58c Stepping = 12
Features=0x8021bf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8,PGE,MMX>
AMD Features=0x80000800<SYSCALL,3DNow!>
real memory = 134152192 (131008K bytes)
avail memory = 126545920 (123580K bytes)
Preloaded elf kernel "kernel" at 0xc03f3000.
VESA: v3.0, 4096k memory, flags:0x1, mode table:0xc0379102 (1000022)
VESA: NVidia
K6-family MTRR support enabled (2 registers)
md0: Malloc disk
npx0: <math processor> on motherboard
npx0: INT 16 interface
pcib0: <Host to PCI bridge> on motherboard
pci0: <PCI bus> on pcib0
pcib2: <VIA 82C598MVP (Apollo MVP3) PCI-PCI (AGP) bridge> at device 1.0 on pci0
pci1: <PCI bus> on pcib2
pci1: <NVidia GeForce 256 graphics accelerator> at 0.0 irq 11
isab0: <VIA 82C586 PCI-ISA bridge> at device 7.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <VIA 82C586 ATA33 controller> port 0xe000-0xe00f at device 7.1 on pci0
ata0: at 0x1f0 irq 14 on atapci0
uhci0: <VIA 83C572 USB controller> port 0xe400-0xe41f irq 10 at device 7.2 on pci0
usb0: <VIA 83C572 USB controller> on uhci0
usb0: USB revision 1.0
uhub0: VIA UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
uhub1: Mitsumi Electric Hub in Apple Extended USB Keyboard, class 9/0, rev 1.10/1.22, addr 2
uhub1: 3 ports with 2 removable, bus powered
ukbd0: Mitsumi Electric Apple Extended USB Keyboard, rev 1.10/1.22, addr 3, iclass 3/1
kbd0 at ukbd0
uhid0: Mitsumi Electric Apple Extended USB Keyboard, rev 1.10/1.22, addr 3, iclass 3/0
ums0: Logitech N48, rev 1.00/4.01, addr 4, iclass 3/1
ums0: 3 buttons and Z dir.
pcm0: <AudioPCI ES1371> port 0xe800-0xe83f irq 12 at device 10.0 on pci0
dc0: <LC82C115 PNIC II 10/100BaseTX> port 0xec00-0xecff mem 0xdd000000-0xdd0000ff irq 5 at device 11.0 on pci0
dc0: Ethernet address: 00:a0:cc:e0:4a:9b
miibus0: <MII bus> on dc0
dcphy0: <Intel 21143 NWAY media interface> on miibus0
dcphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
pcib1: <Host to PCI bridge> on motherboard
pci2: <PCI bus> on pcib1
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
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 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 (EPP/NIBBLE) in COMPATIBLE mode
plip0: <PLIP network interface> on ppbus0
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
ppi0: <Parallel I/O> on ppbus0
IPsec: Initialized Security Association Processing.
ata0-master: DMA limited to UDMA33, non-ATA66 compliant cable
ad0: 9787MB <QUANTUM FIREBALLlct10 10> [19885/16/63] at ata0-master UDMA33
acd0: DVD-ROM <SAMSUNG DVD-ROM SD-612> at ata0-slave using WDMA2
Mounting root from ufs:/dev/ad0s1a
WARNING: / was not properly dismounted
sio0: 1 more silo overflow (total 1)
kernel configuration:
machine i386
cpu I586_CPU
options CPU_WT_ALLOC
ident COCYTUS
maxusers 64
options COMPAT_43
options SCSI_DELAY=15000
options UCONSOLE
options USERCONFIG
options VISUAL_USERCONFIG
options KTRACE
options SYSVSHM
options SYSVMSG
options SYSVSEM
options P1003_1B
options _KPOSIX_PRIORITY_SCHEDULING
options ICMP_BANDLIM
options KBD_INSTALL_CDEV
options FFS
options FFS_ROOT
options SOFTUPDATES
options MFS
options MD_ROOT
options NFS
options NFS_ROOT
options EXT2FS
options MSDOSFS
options CD9660
options CD9660_ROOT
options PROCFS
options FDESC
options KERNFS
options NTFS
options NULLFS
options PORTAL
options UMAPFS
options UNION
options INET
options INET6
options IPSEC
options IPSEC_ESP
options IPX
options NETATALK
device isa
device pci
device fdc0 at isa? port IO_FD1 irq 6 drq 2
device fd0 at fdc0 drive 0
device ata0 at isa? port IO_WD1 irq 14
device ata1 at isa? port IO_WD2 irq 15
device ata
device atadisk
device atapicd
device atapifd
device atapist
options ATA_STATIC_ID
options ATA_ENABLE_ATAPI_DMA
options SYM_SETUP_LP_PROBE_MAP=0x40
device scbus
device da
device atkbdc0 at isa? port IO_KBD
device atkbd0 at atkbdc? irq 1 flags 0x1
device psm0 at atkbdc? irq 12
device vga0 at isa?
options VESA
pseudo-device splash
device sc0 at isa? flags 0x100
options SC_ALT_MOUSE_IMAGE
device npx0 at nexus? port IO_NPX irq 13
device apm0 at nexus? disable flags 0x20
device sio0 at isa? port IO_COM1 flags 0x10 irq 4
device sio1 at isa? port IO_COM2 irq 3
device ppc0 at isa? irq 7
device ppbus
device lpt
device plip
device ppi
device miibus
device dc
pseudo-device loop
pseudo-device ether
pseudo-device sl 1
pseudo-device ppp 1
pseudo-device tun
pseudo-device pty
pseudo-device md
pseudo-device gif 4
pseudo-device faith 1
pseudo-device bpf
device uhci
device ohci
device usb
device ugen
device uhid
device ukbd
device ulpt
device umass
device ums
device uscanner
device pcm
I hope this is enough information. If you need anymore information or have any questions, please e-mail me(diomed@mac.com).
>How-To-Repeat:
ppp -ddial -nat service + dnetc
stir gently and wait a while, possibly a few hours.
just have ppp and dnetc running at the same time, and it should panic eventually. I'm normally connected to the internet when it does panic.
>Fix:
workaround: don't run dnetc w/ppp. avoiding high CPU usage seems to work well, but a little every now and then doesn't seem to hurt..
no real fix that I know of.
>Release-Note:
>Audit-Trail:
>Unformatted:
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-bugs" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200102062328.f16NSR808259>