mount /mnt/cdrom ok!but ls segmentation fault...

mount /mnt/cdrom ok!but ls segmentation fault...

[Vincent]

Hi all,
Using linux-2.4.0-test11-pre7 right now..., here's what i did,
mount /mnt/cdrom
cd /mnt/cdrom
ls
Segmentation fault
ls
*NOT Responding....*
can't kill /sbin/ls
can't umount /mnt/cdrom
ps , shows ;

613 ?        D      0:00 /bin/ls --color=auto -F -b -T 0
           ^^^^^

i didn't want to reboot...
CDRom door is locked..

BTW, what does D mean in ps?

thanks in advance,

-
Regards, Vincent <dtig@ihug.com.au>
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Re: mount /mnt/cdrom ok!but ls segmentation fault...

[Vincent]

"Albert D. Cahalan" wrote:
> 
> The 'D' means that the process is running uninterruptable kernel
> code that should never take long to execute. Usually it means
> the process is doing disk IO.
> 
> To find where process 613 is stuck, do this:
> 
> ps -p 613 -o comm,stat,f,pcpu,nwchan,wchan

  361 pts/1    D      0:00 /bin/ls --color=auto -F -b -T 0
t77@darkstar:~$ ps -p 361 -o comm,stat,f,pcpu,nwchan,wchan
COMMAND          STAT   F %CPU  WCHAN WCHAN
ls               D    000  0.0 107951 down
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no idea... :p since i am a
newbie,
is there anyway of killing such a process?
root@darkstar:~# umount /mnt/cdrom1
umount: /mnt/cdrom1: device is busy
root@darkstar:~# umount -f /mnt/cdrom1
umount2: Device or resource busy
umount: /mnt/cdrom1: device is busy

After playing around with ls ,i found that acutally executing /bin/ls
is ok, only because of the default alias of ls is alias ls='/bin/ls
$LS_OPTIONS' then 
ls will crash...and thus make the cdrom useless.

When ls /mnt/cdrom , from a virtual terminal there are extended kernel
error messages which i don't 
know howto copy the error message into memory or save it into a file.
Where 
if i 'ls /mnt/cdrom' from a gnome-terminal the error message is just
Segmentation fault.

from /var/log/syslog after "ls /mnt/cdrom"
Nov 19 19:46:47 darkstar kernel: Unable to handle kernel paging request
at virtual address dfdfdfc4
Nov 19 19:46:47 darkstar kernel: *pde = 00000000

Unable to handle kernel paging request at virtual address dfdfdfc4
*pde = 00000000
Oops: 0000
CPU: 0
EIP: 0010:[<c486d5a7>]
EFLAGS: 00010202 ............rest went off the screen
i've tried "ls >~/tmp/err.out" , it didn't work just a 0byte file.

hmmm, ok here it's in dmesg|less

Unable to handle kernel paging request at virtual address dfdfdfc4
 printing eip:
c486d5a7
*pde = 00000000
Oops: 0000
CPU:    0
EIP:    0010:[<c486d5a7>]
EFLAGS: 00010202
eax: dfdfdf00   ebx: c2976960   ecx: c1ddb800   edx: c23f5c00
esi: c1ddb800   edi: c1ddb821   ebp: c233fba0   esp: c15b9eb0
ds: 0018   es: 0018   ss: 0018
Process ls (pid: 229, stackpage=c15b9000)
Stack: c2976960 c486a2bf c1ddb800 c2976960 c27f8000 c10a9df0 c1b3d140
c2976960 
       c1b3d140 00000001 c01e1818 00000022 00000022 00000000 0b976960
00000800 
       22994000 c486a3dd c2976960 c1b3d140 c27f8000 c27f8400 fffffff4
c1b3d140 
Call Trace: [<c486a2bf>] [<c486a3dd>] [<c013502b>] [<c0135788>]
[<c0134dc7>] [<c0135d90>] [<c0132a26>] 
       [<c0108daf>] 
Code: 8b 90 c4 00 00 00 80 b8 b4 00 00 00 00 74 1e 68 00 10 00 00 
lines 76-116/116 (END) 

thank you for reply,
-
Regards, Vincent <dtig@ihug.com.au>
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Re: mount /mnt/cdrom ok!but ls segmentation fault...

[Keith Owens]

On Sun, 19 Nov 2000 20:28:39 +1100, 
Vincent <dtig@ihug.com.au> wrote:
>Nov 19 19:46:47 darkstar kernel: Unable to handle kernel paging request
>at virtual address dfdfdfc4
>Nov 19 19:46:47 darkstar kernel: *pde = 00000000
>EIP: 0010:[<c486d5a7>]

See linux/REPORTING-BUGS.

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Re: mount /mnt/cdrom ok!but ls segmentation fault...

[Dr. Kelsey Hudson]

On Sun, 19 Nov 2000, Vincent wrote:
> Using linux-2.4.0-test11-pre7 right now..., here's what i did,
> mount /mnt/cdrom
> cd /mnt/cdrom
> ls
> Segmentation fault
> ls
> *NOT Responding....*
> can't kill /sbin/ls
> can't umount /mnt/cdrom
> ps , shows ;
> 
> 613 ?        D      0:00 /bin/ls --color=auto -F -b -T 0
>            ^^^^^
> 
> i didn't want to reboot...
> CDRom door is locked..
> 
> BTW, what does D mean in ps?

It's somewhat comforting to know that someone else has the same problem as
I do. I'd be willing to bet that he's using SCSI hostadapter emulation
with this. I am, and it only started happening as soon as I enabled
it. Any ideas? I need the sg stuff for my CD recorder to work properly...

 Kelsey Hudson                                           khudson@ctica.com 
 Software Engineer
 Compendium Technologies, Inc                               (619) 725-0771
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