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Date: Wed, 21 May 2003 12:25:34 -0500
From: "Jeffrey E. Hundstad" <jeffrey.hundstad@mnsu.edu>
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Subject: ooops report 2.4.20-xfs-CVS-2003-02-21_06:00_UTC
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Hello,

We had a machine hang on us twice since upgrading from 2.4.18-xfs.  It 
ran for months without any problems.  We upgraded to 
2.4.20-xfs-CVS-2003-02-21_06:00_UTC and patched it for the ptrace 
vurnerablility.  When the machine hangs it has a VERY high load average 
~200 and as soon as you issue a disk-io request of any kind your process 
  hangs.  The hang has been happening during a cpio backup of the system.

This last time we caught some/most of an ooops.  I'll include the 
ksymoops output and the raw input. I think we may be able to glean more 
information from the report, but I'm not really familiar with the ooops 
output.  Let me know if I can do anything to make the report better.

Here's some info. about the computer.

CPU: Pentium III (Coppermine) x 2 x 667 MHz
Compiler: gcc version 2.95.4 20011002 (Debian prerelease)
Drives:  software raid1 - 2xMaxtor 4G160J8-ide drives (with the write 
cache turned off)

ksymoops'ed report:

ksymoops 2.4.9 on i686 2.4.20-xfs.  Options used
      -V (default)
      -k /var/log/ksymoops/20030521062552.ksyms (specified)
      -l /var/log/ksymoops/20030521062552.modules (specified)
      -o /lib/modules/2.4.20-xfs (specified)
      -m /boot/System.map-2.4.20-xfs (specified)

Code: 39 70 30 0f 85 9d 00 00 00 39 78 34 0f 85 94 00 00 00 8b 50
Using defaults from ksymoops -t elf32-i386 -a i386


Code;  00000000 Before first symbol
00000000 <_EIP>:
Code;  00000000 Before first symbol
    0:   39 70 30                  cmp    %esi,0x30(%eax)
Code;  00000003 Before first symbol
    3:   0f 85 9d 00 00 00         jne    a6 <_EIP+0xa6> 000000a6 Before 
first symbol
Code;  00000009 Before first symbol
    9:   39 78 34                  cmp    %edi,0x34(%eax)
Code;  0000000c Before first symbol
    c:   0f 85 94 00 00 00         jne    a6 <_EIP+0xa6> 000000a6 Before 
first symbol
Code;  00000012 Before first symbol
   12:   8b 50 00                  mov    0x0(%eax),%edx

<1> unable to handle kernel paging request at virtual address a4446e2b
c01ce450
*pde = 00000000
CPU: 0
EIP: 0010:[<c01ce450>] Not tainted
EFLAGS: 00010286
Stack: ded82c00 ded82c48 00000000
        00000000
        d6054840
Call Trace: [<c01d3900>] [<c01ce315>] [<c01e0c73>]
         [<c013d5da>] [<c013c7b0>]
         [<c013ca9a>] [<c0107134>]
Code: 83 7b 14 00 0f 84 79 07 00 00 8b 6b 1c 85 ed 0f 85 db 00 00


 >>EIP; c01ce450 <xfs_syncsub+134/b78>   <=====

Trace; c01d3900 <xfs_inode_flush+1b0/1cc>
Trace; c01ce315 <xfs_sync+15/1c>
Trace; c01e0c73 <linvfs_write_super+27/2c>
Trace; c013d5da <sync_supers+f6/148>
Trace; c013c7b0 <sync_old_buffers+34/9c>
Trace; c013ca9a <kupdate+fe/120>
Trace; c0107134 <arch_kernel_thread+28/38>

Code;  c01ce450 <xfs_syncsub+134/b78>
00000000 <_EIP>:
Code;  c01ce450 <xfs_syncsub+134/b78>   <=====
    0:   83 7b 14 00               cmpl   $0x0,0x14(%ebx)   <=====
Code;  c01ce454 <xfs_syncsub+138/b78>
    4:   0f 84 79 07 00 00         je     783 <_EIP+0x783> c01cebd3 
<xfs_syncsub+8b7/b78>
Code;  c01ce45a <xfs_syncsub+13e/b78>
    a:   8b 6b 1c                  mov    0x1c(%ebx),%ebp
Code;  c01ce45d <xfs_syncsub+141/b78>
    d:   85 ed                     test   %ebp,%ebp
Code;  c01ce45f <xfs_syncsub+143/b78>
    f:   0f 85 db 00 00 00         jne    f0 <_EIP+0xf0> c01ce540 
<xfs_syncsub+224/b78>


Raw ooops hand copied from screen:

Code: 39 70 30 0f 85 9d 00 00 00 39 78 34 0f 85 94 00 00 00 8b 50
<1> unable to handle kernel paging request at virtual address a4446e2b
printing eip:
c01ce450
*pde = 00000000
Ooops: 0000
st sg appletalk eepro100 mii lvm-mod raid5 xor raid1 raid0 linear md aic7xxx
CPU: 0
EIP: 0010:[<c01ce450>] Not tainted
EFLAGS: 00010286
eax:
es:
ds:
Process kupdated (pid: 7 stackpage = c1621000
Stack: ded82c00 ded82c48 00000000
        00000000
        d6054840
Call Trace: [<c01d3900>] [<c01ce315>] [<c01e0c73>]
	[<c013d5da>] [<c013c7b0>]
	[<c013ca9a>] [<c0107134>]
Code: 83 7b 14 00 0f 84 79 07 00 00 8b 6b 1c 85 ed 0f 85 db 00 00