Re: Why system panic after sometimes?

hello denk,
I am sorry i have not described clear.
We use HardHat CDK1.2's cross compile.
We use firmware from pSOS's, and just move kernel's
image from flash into sdram then jump to it.

We have not use USB driver yet, I have writed a driver
for a MPEGI coder chip (operate it via data and
address bus).I think my driver (just handle interrupts
from chip) is safe and will not affect kernel
here is ps's output:
# ps -e

  PID TTY          TIME CMD

    1 ?        00:00:15 init

    2 ?        00:00:00 keventd

    3 ?        00:00:02 kswapd  //here sometimes will
change to <defunct>

    4 ?        00:00:00 kreclaimd

    5 ?        00:00:00 bdflush

    6 ?        00:00:01 kupdated

   12 ?        00:00:00 sh

   14 ?        00:00:00 inetd

   77 ?        01:23:54 video_start  //this is our
server application

   80 ?        00:00:00 ps


and i don't know how to decode backtrace?

thanks.



 --- Wolfgang Denk [off-list ref] 的正文：>

In message

[ref]

you wrote:

quoted

This question has bothered me,I use linux-2.4.4 (
downloaded from denx.de and porting to our borad
MPC850+4Mflash+32Mram+USB).We run a server

application

Which version of cross tools are you using?

What firmware is used to initialize the board?

Which device drivers are used? USB???

quoted

in borad,but after sometimes such as about a day

or

quoted

even several hours ,system will panic. I check our
program, i think there are no memory leak(or it

will

quoted

panic in same time) and other fatal error.
Here is my dump information:

# Oops: Kernel Mode Software FPU Emulation, sig: 8
NIP: 00001FFC XER: E0007B7F LR: 0000098C SP:

C011AE90

quoted

REGS: c011ade0 TRAP: 1000
MSR: 00001000 EE: 0 PR: 0 FP: 0 ME: 1 IR/DR: 00
TASK = c0118fe0[0] 'swapper' Last syscall: 120
last math 00000000 last altivec 00000000
GPR00: 00000002 C011AE90 C0118FE0 C011AEA0

0035E000

quoted

C18FDDE8 C0118FE0 00000017
GPR08: C0124094 000E711D C18FC000 C014B3E0

30026438

quoted

100195BC 94FF7FD7 B97FDD3E
GPR16: DBFFE6E5 028002E8 FA200000 FFFFFFF6

00001032

quoted

0011AE90 C000BEDC 00009032
GPR24: 00000000 00000001 C18FC000 0020000D

C03E2190

quoted

00002000 C03E2190 C011AF50
Call backtrace:
C0003800 00009032 C0003E44 C0003E5C C0128750

C00021E4

quoted

Kernel panic: Attempted to kill the idle task!

Did you ever try to decode this backtrace? What's
that C0128750 there?

Wolfgang Denk

--
Software Engineering:  Embedded and Realtime
Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88
Email: wd@denx.de
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