Re: troubleshooting page fault/kernel panic

[Kris Kennaway]

On Sun, May 16, 2004 at 06:45:09PM -0400, Streiner, Justin wrote:
> This is a freebsd 5.2.1 system.  Sometimes, when copying large amounts of
> data from the network, the machine will page-fault, spit out some errors
> and reboot.
> 
> Any insight as to what could be causing this and what I can do to fix
> it would be greatly appreciated.  I can also provide more details on the
> hardware if needed.

See the developers handbook chapter on kernel debugging on how to
provide the required information to begin tracking this down.

Kris


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Description: PGP signature

troubleshooting page fault/kernel panic

[Streiner, Justin]

This is a freebsd 5.2.1 system.  Sometimes, when copying large amounts of
data from the network, the machine will page-fault, spit out some errors
and reboot.

Any insight as to what could be causing this and what I can do to fix
it would be greatly appreciated.  I can also provide more details on the
hardware if needed.

/var/log/messages shows the following from the event that caused the
reboot:

May 16 18:32:20 whammy kernel: Fatal trap 12: page fault while in kernel mode
May 16 18:32:20 whammy kernel: cpuid = 0; apic id = 00
May 16 18:32:20 whammy kernel: fault virtual address= 0xf0db264b
May 16 18:32:20 whammy kernel: fault code   = supervisor read, page not 
present
May 16 18:32:20 whammy kernel: instruction pointer  = 0x8:0xc064f2a7
May 16 18:32:20 whammy kernel: stack pointer= 0x10:0xd77ccc48
May 16 18:32:20 whammy kernel: frame pointer= 0x10:0xd77ccc6c
May 16 18:32:20 whammy kernel: code segment = base 0x0, limit 0xf, 
type 0x1b
May 16 18:32:20 whammy kernel: = DPL 0, pres 1, def32 1, gran 1
May 16 18:32:20 whammy kernel: processor eflags = interrupt enabled, resume, IOPL = 0
May 16 18:32:20 whammy kernel: current process  = 45 (swi7: task queue)
May 16 18:32:20 whammy kernel: trap number  = 12
May 16 18:32:20 whammy kernel: panic: page fault
May 16 18:32:20 whammy kernel: cpuid = 0;
May 16 18:32:20 whammy kernel: boot() called on cpu#0
May 16 18:32:20 whammy kernel:
May 16 18:32:20 whammy kernel: syncing disks, buffers remaining... 3233 3233 3233 3233 
3233 3233 3233 3233 3233 3233 3233 3233 3233 3233 ath0: device timeout
May 16 18:32:20 whammy kernel: 3233 ad1: WARNING - WRITE_DMA interrupt was seen but 
timeout fired LBA=6728498
May 16 18:32:20 whammy kernel: 3233 3233 3233 3233 3233 ad1: WARNING - WRITE_DMA 
interrupt was seen but timeout fired LBA=6728498
May 16 18:32:20 whammy kernel:
May 16 18:32:20 whammy kernel: giving up on 2914 buffers
May 16 18:32:20 whammy kernel: Uptime: 2h24m54s
May 16 18:32:20 whammy kernel: ad1: WARNING - WRITE_DMA interrupt was seen but 
taskqueue stalled LBA=6728498
May 16 18:32:20 whammy kernel: ad0: WARNING - FLUSHCACHE interrupt was seen but 
taskqueue stalled
May 16 18:32:20 whammy kernel: ad1: WARNING - FLUSHCACHE interrupt was seen but 
taskqueue stalled
May 16 18:32:20 whammy kernel: Shutting down ACPI
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