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Re: bad_page_fault oops

To: "Mulyadi Santosa" <mulyadi.santosa@xxxxxxxxx>
Subject: Re: bad_page_fault oops
From: "Roberto A. Foglietta" <roberto.foglietta@xxxxxxxxx>
Date: Mon, 5 May 2008 14:21:31 +0200
Cc: "Gaurav Aggarwal" <Gaurav.Aggarwal@xxxxxxxxxx>, "Linux Kernel List" <kernelnewbies@xxxxxxxxxxxx>
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2008/5/5 Roberto A. Foglietta <roberto.foglietta@xxxxxxxxx>:
> 2008/4/18 Mulyadi Santosa <mulyadi.santosa@xxxxxxxxx>:
>
>
> > Hi alll
>  >
>  >
>  >  On Thu, Apr 17, 2008 at 4:45 PM, Gaurav Aggarwal
>  >  <Gaurav.Aggarwal@xxxxxxxxxx> wrote:
>  >  > "BUG: scheduling while atomic: snoopy/0x00000001/1666"
>  >  >
>  >  >  From this statement it looks that you are calling blocking/sleeping
>  >  >  function inside the critical section or code path where it's not
>  >  >  allowed. This will be really helpful if you just describe about the
>  >  >  stuff that you are trying to do when you get this error.
>  >  >  To know more about oops message you can read the oops-tracing.txt doc
>  >  >  from linux-2.x.y/Documentation folder.
>  >
>  >  I try to sharpen the analysis. The stack trace show handle_page_fault,
>  >  thus it is possible there's blocking memory allocation inside non
>  >  preemptible code section.
>  >
>
>   Thank you for your suggestion but... in a way or another I still see
>  some of these oops.
>   The attached text file is reporting some warnings from pcmcia-cs at
>  boot start and two oopses.
>   The first oops happened during the startup and the second one happen
>  calling hwclock in shutdown.
>   Despite the oops message I think could be exist a relation between
>  pcmcia-cs warnings and these oops.
>   Do you agree? If yes: how could I verify a thing like this?
>
>   Thanks in advance,
>  --
>  /roberto
>

 Sorry for having forgotten the attachment!
 :-)

-- 
/roberto

cardmgr[169]: cannot access /lib/modules/2.6.21.7: No such file or directory
pcmcia: Detected deprecated PCMCIA ioctl usage from process: cardmgr.
pcmcia: This interface will soon be removed from the kernel; please expect breakage unless you upgrade to new tools.
pcmcia: see http://www.kernel.org/pub/linux/utils/kernel/pcmcia/pcmcia.html for details.
cardmgr[169]: watching 1 socket
cardmgr[169]: could not adjust resource: IO ports 0x400-0x4ff: Input/output error
cardmgr[169]: could not adjust resource: IO ports 0-0xff: Input/output error
cardmgr[169]: could not adjust resource: memory 0xa0000000-0xa0ffffff: Input/output error
cardmgr[169]: could not adjust resource: IO ports 0xa00-0xaff: Input/output error
cardmgr[169]: could not open /var/run/cardmgr.pid: No such file or directory
cardmgr[169]: fopen(stabfile) failed: No such file or directory
cardmgr[169]: socket 0: ATA/IDE Fixed Disk
cardmgr[169]: fopen(stabfile) failed: No such file or directory
cardmgr[169]: executing: './ide start hda 2>&1'
cardmgr[169]: + ./ide: 34: /sbin/ide_info: not found
cardmgr[169]: + ./ide: 73: /usr/sbin/updfstab: not found
cardmgr[169]: exiting



Oops: kernel access of bad area, sig: 11 [#1]
PREEMPT
NIP: 00000000 LR: 00000000 CTR: 00000000
REGS: ced75c90 TRAP: 0400   Not tainted  (2.6.21.7)
MSR: 20009032 <EE,ME,IR,DR>  CR: 24048888  XER: 20000000
TASK = cfb61850[1745] 'startup.sh' THREAD: ced74000
GPR00: 00000000 CED75D40 CFB61850 C02F5630 C0400000 10040000 10000000 C0543060
GPR08: 1003F000 C02F0000 0000F603 00000000 44048882 10089214 00000000 00000000
GPR16: CFBFE8E0 00000007 CED75F50 00000000 00000000 C02F5630 00000001 CED75D5C
GPR24: 00000000 CED75D58 00000000 00000001 FFFFFFFF 10070000 10040000 CF5D7764
NIP [00000000] 0x0
LR [00000000] 0x0
Call Trace:
Instruction dump:
XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
note: startup.sh[1745] exited with preempt_count 1
Segmentation fault


Oops: kernel access of bad area, sig: 11 [#1]
PREEMPT
NIP: 00000000 LR: 00000000 CTR: 00000000
REGS: ced0fdd0 TRAP: 0400   Not tainted  (2.6.21.7)
MSR: 20009032 <EE,ME,IR,DR>  CR: 28004428  XER: 20000000
TASK = cfaba810[1903] 'hwclock' THREAD: ced0e000
GPR00: 00000000 CED0FE80 CFABA810 C02F5630 C0400000 30009000 30001000 C0366FC0
GPR08: 30008000 C02F0000 000007FE 00000000 48004422 10089214 0FFC4000 00000001
GPR16: FFFFFFFF 007FFF00 0FFBF6D8 00000000 00000000 C02F5630 00000001 CED0FE9C
GPR24: 00000000 CED0FE98 00000000 00000001 FFFFFFFF 3001A000 30009000 CC6423C8
NIP [00000000] 0x0
LR [00000000] 0x0
Call Trace:
Instruction dump:
XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
Fixing recursive fault but reboot is needed!
BUG: scheduling while atomic: hwclock/0x00000001/1903
Call Trace:
[CED0FCD0] [C000C174] show_stack+0x4c/0x194 (unreliable)
[CED0FD10] [C02386C4] schedule+0x6a4/0x6a8
[CED0FD50] [C001B490] do_exit+0x440/0x480
[CED0FD80] [C0004AD8] die+0xc4/0xcc
[CED0FDA0] [C000E1B0] bad_page_fault+0x5c/0x60
[CED0FDC0] [C000459C] handle_page_fault+0x7c/0x80
[CED0FE80] [00000000] 0x0

Follow-Ups:
- Re: bad_page_fault oops
  - From: Roberto A. Foglietta

References:
- Re: bad_page_fault oops
  - From: Roberto A. Foglietta

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