- Original Message -
From: Thirumalai thirumala...@datapatterns.co.in
To: u-boot@lists.denx.de; linuxppc-...@ozlabs.org
Sent: Saturday, June 12, 2010 10:40 AM
Subject: [U-Boot] random exception on ppc based board
Hi,
I am having a ppc based target on which linux-2.4.20 kernel is running
with u-boot 1.3.4 as boot loader. The target is having MPC7410 as
processor
and MPC107 as system controller. Regarding memory it is having 128 MB of
ram
and 16 MB of Flash memory. Also the kernel is patched with RTLinux-3.2 for
realtime performance. I am getting a random Program and DSI exception on
the
target. Normally the exeption occurs during loading of rtl_time.o. The
panic
message is given below.
==
Using /usr/rtlinux/modules/rtl_time.okernel BUG at page_alloc.c:221!
Oops: Exception in kernel mode, sig: 4
NIP: C0032980 XER: LR: C0032980 SP: C7CEDBA0 REGS: c7cedaf0 TRAP:
0700Not tainted
MSR: 00089032 EE: 1 PR: 0 FP: 0 ME: 1 IR/DR: 11
TASK = c7cec000[366] 'exe' Last syscall: 3
last math c7cec000 last altivec
GPR00: C0032980 C7CEDBA0 C7CEC000 0020 0001 0001 1137
GPR08: 0002 CD879EC0 C7CEDAB0 CD876108 C0011934
GPR16: 0004 0001 C002A0E8 C789E840 9032 07CEDD90 C01A2C70
C01A2C70
GPR24: 0001 C016E080 C79966E0 C016E0B8
C016E0C4
Call backtrace:
C0032980 C0033020 C0032C4C C0025A18 C0025B58 C0025D8C C000EF88
C0005D48 C03A8B28 C0029B28 C002A258 C003A99C C0005AFC
0FF15DBC 0FF175DC 0FF09894 10012190 100127D0 100356AC 100352A4
0FEBCF6C
Oops: kernel access of bad area, sig: 11
NIP: C00326DC XER: LR: C0032588 SP: C7CED880 REGS: c7ced7d0 TRAP:
0300Not tainted
MSR: 9032 EE: 1 PR: 0 FP: 0 ME: 1 IR/DR: 11
DAR: , DSISR: 4200
TASK = c7cec000[366] 'exe' Last syscall: 3
last math c7cec000 last altivec
GPR00: C7CED880 C7CEC000 C7CED888 30026000 C0388250
GPR08: 8000 00155210 CD876CD4 C0032588
GPR16: 0004 0001 C002A0E8 C789E840 9032 C01A2C70 C01A2C70
C016E130
GPR24: C0233024 C0388234 3E06 7C0C C016E080 FFFE C016E0B8
C0388260
Call backtrace:
C003249C C0033398 C0033B18 C00243D8 C0026234 C00246D0 C0027A70
C001326C C00187D4 C0005ED4 C0005F44 C00062B0 C0005D48 C0032980
C0033020 C0032C4C C0025A18 C0025B58 C0025D8C C000EF88 C0005D48
C03A8B28 C0029B28 C002A258 C003A99C C0005AFC 0FF15DBC
0FF175DC 0FF09894 10012190 100127D0 100356AC
Illegal instruction
Sometimes i am getting the following panic message.
===
Oops: kernel access of bad area, sig: 11
NIP: C0033360 XER: 2000 LR: C00DE9A8 SP: C016C0D0 REGS: c016c020 TRAP:
0300Tainted: P
MSR: 9032 EE: 1 PR: 0 FP: 0 ME: 1 IR/DR: 11
DAR: 03910018, DSISR: 4000
TASK = c016a480[0] 'swapper' Last syscall: 120
last math c505c000 last altivec
GPR00: C00DE9A8 C016C0D0 C016A480 0391 C5A469DC
GPR08: 0001 03910014 0043 C5A2FE20 2490C022 C0030A04 07FF0D00
GPR16: 00044008 1032 0003
0A050393
GPR24: C5A46980 C5A2F842 0040 C5A2F842 C01C C5A46980
0001
Call backtrace:
0040 C00DE9A8 C00DE9DC C00DEB28 C01163D4 C01166EC C00F4898
C00F44E4 C00F4AC8 C00F468C C00E3664 C00E3810 C00E397C C001A200
C0007620 CD876CAC C0005D40 C000744C C0007460 C0003918 C01815E0
35F0
Kernel panic: Aiee, killing interrupt handler!
In interrupt handler - not syncing
0Rebooting in 180 seconds..
How to debug this???
-Thirumalai
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Hi all,
We fixed this problem. When we ran e2fsck -f ramdisk.img it shown me
0.9% non-contiguos block. So we tried to defragment the ramdisk image using
e2defrag utility. After this the problem disappeared. But i don't know how
an ext2 file system is getting fragmented ? Also how this particular file
(rtl_time.o) is getting fragmented?
Any clue?
-Thirumalai
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