Hiya,

Been having frequent (every 4-8 days) oopses with 2.4.19pre10aa4 on
a moderately loaded server (100 users - 0.4 load avg).

The server is a Intel STL2 with dual P3, 1GB RAM, Intel Pro1000T
and Qlogic 2300 Fibre channel HBA.

We are running qla2300, e1000 and lvm modules unmodified as present in
2.4.19pre10aa4. We also have quotas enabled on 1 of the ext3 fs.

This is the first captive oops after setting up logging on the console
ports (previously, our cluster software would shoot the machine with
a remote power switch, and we'd loose the oops - oopsing to floppy
or somesuch would be great!).

We have also had similar lock-ups with 2.4.18pre2aa2 although have
not been able to catch the oopses.

I can't say i understand the oopses, but from what I can see it
appears a bufferhead is being accessed that may have been freed.

~mc

ksymoops 2.4.1 on i686 2.4.19-pre10.  Options used
      -V (default)
      -k /proc/ksyms (default)
      -l /proc/modules (default)
      -o /lib/modules/2.4.19-pre10/ (default)
      -m /boot/System.map-2.4.19-pre10 (default)

Warning: You did not tell me where to find symbol information.  I will
assume that the log matches the kernel and modules that are running
right now and I'll use the default options above for symbol resolution.
If the current kernel and/or modules do not match the log, you can get
more accurate output by telling me the kernel version and where to find
map, modules, ksyms etc.  ksymoops -h explains the options.

Warning (compare_maps): ksyms_base symbol set_cpus_allowed_R__ver_set_cpus_allowed not found in System.map.  Ignoring ksyms_base entry
Warning (compare_maps): mismatch on symbol vg  , lvm-mod says c4008720, /lib/modules/2.4.19-pre10/kernel/drivers/md/lvm-mod.o says c40085e0.  Ignoring /lib/modules/2.4.19-pre10/kernel/drivers/md/lvm-mod.o entry
Warning (compare_maps): mismatch on symbol md_size  , md says c30a89e0, /lib/modules/2.4.19-pre10/kernel/drivers/md/md.o says c30a8800.  Ignoring /lib/modules/2.4.19-pre10/kernel/drivers/md/md.o entry
Warning (compare_maps): mismatch on symbol mddev_map  , md says c30a81e0, /lib/modules/2.4.19-pre10/kernel/drivers/md/md.o says c30a8000.  Ignoring /lib/modules/2.4.19-pre10/kernel/drivers/md/md.o entry
Warning (compare_maps): mismatch on symbol usb_devfs_handle  , usbcore says c2e6e694, /lib/modules/2.4.19-pre10/kernel/drivers/usb/usbcore.o says c2e6e0f4.  Ignoring /lib/modules/2.4.19-pre10/kernel/drivers/usb/usbcore.o entry

Reading Oops report from the terminal
Unable to handle kernel paging request at virtual address 6d727567
c0140ca6
*pde = 00000000
Oops: 0000
CPU:    0
EIP:    0010:[<c0140ca6>]    Not tainted
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010206
eax: c0284b40   ebx: 00000004   ecx: e1f8d540   edx: 6d727563
esi: 01569a5b   edi: 00003a09   ebp: 00000010   esp: eed6de10
ds: 0018   es: 0018   ss: 0018
Process afpd (pid: 20529, stackpage=eed6d000)
Stack: 0000e384 00000000 00001000 00001000 eed6de68 c0141a2b 00003a09 01569a5b
        00001000 00001000 00001000 c0141d69 ebb2a440 00000000 c0141d8a ee9793e0
        ee9793e0 f181c000 00001000 0000017a 00000000 ee9793e0 00001000 00000000
Call Trace: [<c0141a2b>] [<c0141d69>] [<c0141d8a>] [<c0142705>] [<c016bab0>]
    [<c0173577>] [<c016c018>] [<c016bab0>] [<c01364b5>] [<c0131992>] [<c01f5788>]
    [<c0169822>] [<c013f206>] [<c0108aeb>]
Code: 39 72 04 89 d1 75 f3 0f b7 42 08 3b 44 24 20 75 e9 66 39 7a


 >>EIP; c0140ca6 <get_hash_table+76/a0>   <=====

Trace; c0141a2b <unmap_underlying_metadata+1b/60>
Trace; c0141d69 <__block_prepare_write+f9/320>
Trace; c0141d8a <__block_prepare_write+11a/320>
Trace; c0142705 <block_prepare_write+25/80>
Trace; c016bab0 <ext3_get_block+0/70>
Trace; c0173577 <journal_start+b7/e0>
Trace; c016c018 <ext3_prepare_write+c8/200>
Trace; c016bab0 <ext3_get_block+0/70>
Trace; c01364b5 <lru_cache_add+65/70>
Trace; c0131992 <generic_file_write+4e2/7e0>
Trace; c01f5788 <sock_read+88/a0>
Trace; c0169822 <ext3_file_write+22/b0>
Trace; c013f206 <sys_write+96/110>
Trace; c0108aeb <system_call+33/38>
Code;  c0140ca6 <get_hash_table+76/a0>
00000000 <_EIP>:
Code;  c0140ca6 <get_hash_table+76/a0>   <=====
    0:   39 72 04                  cmp    %esi,0x4(%edx)   <=====
Code;  c0140ca9 <get_hash_table+79/a0>
    3:   89 d1                     mov    %edx,%ecx
Code;  c0140cab <get_hash_table+7b/a0>
    5:   75 f3                     jne    fffffffa <_EIP+0xfffffffa> c0140ca0 <get_hash_table+70/a0>
Code;  c0140cad <get_hash_table+7d/a0>
    7:   0f b7 42 08               movzwl 0x8(%edx),%eax
Code;  c0140cb1 <get_hash_table+81/a0>
    b:   3b 44 24 20               cmp    0x20(%esp,1),%eax
Code;  c0140cb5 <get_hash_table+85/a0>
    f:   75 e9                     jne    fffffffa <_EIP+0xfffffffa> c0140ca0 <get_hash_table+70/a0>
Code;  c0140cb7 <get_hash_table+87/a0>
   11:   66 39 7a 00               cmp    %di,0x0(%edx)

kernel BUG at transaction.c:227!
invalid operand: 0000
CPU:    0
EIP:    0010:[<c0173518>]    Not tainted
EFLAGS: 00010282
eax: 0000006c   ebx: c27af7e0   ecx: c2710000   edx: c2711f64
esi: eed6c000   edi: e11c1d80   ebp: c1e26600   esp: eed6db5c
ds: 0018   es: 0018   ss: 0018
Process afpd (pid: 20529, stackpage=eed6d000)
Stack: c024f3e0 c024c10a c024c839 000000e3 c0251320 c27af7e0 c27af7e0 ffffffe2
        e11c1d80 ed4ab220 c016e38e c1e26600 00000001 00000000 00000000 33323130
        c1e0f400 e11c1d80 c1e0f400 00000001 c0153f8e e11c1d80 000001ff e11c1d80
Call Trace: [<c016e38e>] [<c0153f8e>] [<c01317fa>] [<c013d568>] [<c0169822>]
    [<c01229ca>] [<c0122a3a>] [<c011eaee>] [<c01090dd>] [<c0140ca6>] [<c01166a8>]
    [<c0140ca6>] [<c016b1f5>] [<c016b9e7>] [<c016b8dd>] [<c01162b0>] [<c0108bdc>]
    [<c0140018>] [<c0140ca6>] [<c0141a2b>] [<c0141d69>] [<c0141d8a>] [<c0142705>]
    [<c016bab0>] [<c0173577>] [<c016c018>] [<c016bab0>] [<c01364b5>] [<c0131992>]
    [<c01f5788>] [<c0169822>] [<c013f206>] [<c0108aeb>]
Code: 0f 0b e3 00 39 c8 24 c0 83 c4 14 ff 43 08 eb 6a 6a 01 68 f0


 >>EIP; c0173518 <journal_start+58/e0>   <=====

Trace; c016e38e <ext3_dirty_inode+6e/100>
Trace; c0153f8e <__mark_inode_dirty+2e/a0>
Trace; c01317fa <generic_file_write+34a/7e0>
Trace; c013d568 <vfs_statfs+58/90>
Trace; c0169822 <ext3_file_write+22/b0>
Trace; c01229ca <do_acct_process+25a/270>
Trace; c0122a3a <acct_process+5a/86>
Trace; c011eaee <do_exit+6e/310>
Trace; c01090dd <die+6d/80>
Trace; c0140ca6 <get_hash_table+76/a0>
Trace; c01166a8 <do_page_fault+3f8/614>
Trace; c0140ca6 <get_hash_table+76/a0>
Trace; c016b1f5 <ext3_get_branch+55/d0>
Trace; c016b9e7 <ext3_get_block_handle+247/310>
Trace; c016b8dd <ext3_get_block_handle+13d/310>
Trace; c01162b0 <do_page_fault+0/614>
Trace; c0108bdc <error_code+34/3c>
Trace; c0140018 <fput+18/f0>
Trace; c0140ca6 <get_hash_table+76/a0>
Trace; c0141a2b <unmap_underlying_metadata+1b/60>
Trace; c0141d69 <__block_prepare_write+f9/320>
Trace; c0141d8a <__block_prepare_write+11a/320>
Trace; c0142705 <block_prepare_write+25/80>
Trace; c016bab0 <ext3_get_block+0/70>
Trace; c0173577 <journal_start+b7/e0>
Trace; c016c018 <ext3_prepare_write+c8/200>
Trace; c016bab0 <ext3_get_block+0/70>
Trace; c01364b5 <lru_cache_add+65/70>
Trace; c0131992 <generic_file_write+4e2/7e0>
Trace; c01f5788 <sock_read+88/a0>
Trace; c0169822 <ext3_file_write+22/b0>
Trace; c013f206 <sys_write+96/110>
Trace; c0108aeb <system_call+33/38>
Code;  c0173518 <journal_start+58/e0>
00000000 <_EIP>:
Code;  c0173518 <journal_start+58/e0>   <=====
    0:   0f 0b                     ud2a      <=====
Code;  c017351a <journal_start+5a/e0>
    2:   e3 00                     jecxz  4 <_EIP+0x4> c017351c <journal_start+5c/e0>
Code;  c017351c <journal_start+5c/e0>
    4:   39 c8                     cmp    %ecx,%eax
Code;  c017351e <journal_start+5e/e0>
    6:   24 c0                     and    $0xc0,%al
Code;  c0173520 <journal_start+60/e0>
    8:   83 c4 14                  add    $0x14,%esp
Code;  c0173523 <journal_start+63/e0>
    b:   ff 43 08                  incl   0x8(%ebx)
Code;  c0173526 <journal_start+66/e0>
    e:   eb 6a                     jmp    7a <_EIP+0x7a> c0173592 <journal_start+d2/e0>
Code;  c0173528 <journal_start+68/e0>
   10:   6a 01                     push   $0x1
Code;  c017352a <journal_start+6a/e0>
   12:   68 f0 00 00 00            push   $0xf0