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SubjectOops from a 2.4.18pre2aa2 kernel
kernel 2.4.18pre2aa2 with a RH 7.0 distribution

Hi Attached is a decoded oops from a SMP 2GB RAM box being used
as a webserver [Apache] fronted by Squid and having lots of UW-IMAP
processes reading mailboxes over NFS. The box typically has a load
average of 70 with very few runnable processes [most of them are in D
state waiting for relatively slow NFS IO]

There are similar FreeBSD 4.4-stable boxes and they seem to have much
fewer processes stuck in disk wait state [similar amount of web traffic]
and NFS seems much speedier there compared to 2.4.18pre2aa2

I/O subsystem, 2 IDE disks connected to Promise ATA-100 card in software
RAID-1 configuration

If there is any other information, I can provide. please let me know

Regards, Yusuf

Yusuf Goolamabbas

ksymoops 2.3.4 on i686 2.4.18pre2aa2. Options used
-V (default)
-k /proc/ksyms (default)
-l /proc/modules (default)
-o /lib/modules/2.4.18pre2aa2/ (default)
-m /usr/src/linux/ (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.

No modules in ksyms, skipping objects
Warning (read_lsmod): no symbols in lsmod, is /proc/modules a valid lsmod file?
Warning (compare_maps): mismatch on symbol partition_name , ksyms_base says c01c61b0, says c0156060. Ignoring ksyms_base entry
Status: RO
Unable to handle kernel paging request at virtual address 5a5a5a76
*pde = 00000000
Oops: 0002
CPU: 0
EIP: 0010:[<c01f8133>] Not tainted
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010206
eax: 5a5a5a5a ebx: d7fc6d24 ecx: 5a5a5a5a edx: 5a5a5a5a
esi: c36c3490 edi: d8ab2a0d ebp: f5ab98d8 esp: c026fc90
ds: 0018 es: 0018 ss: 0018
Process swapper (pid: 0, stackpage=c026f000)
Stack: d7fc6d24 d8ab29dc c01f82c8 d7fc6d24 d7fc6d24 e399e084 c3bfc484
00000000 c3bfc484 c01d8694 c3bfc484 c026fe20 c026fe20 c026fe40
00000000 c37a6800 c37a6800 c01d241e c37a6800 00000000 00000001
Call Trace: [<c01f82c8>] [<c01d8694>] [<c01d241e>] [<c01e1aa2>]
[<c01e1e24>] [<c01d26dc>] [<c01cee9c>] [<c01cefd7>] [<c01edad4>]
[<c01ea268>] [<c01ce929>] [<c01f94fd>] [<c01cfe84>] [<c01f683d>]
[<c01df417>] [<c01df794>] [<c01a1571>] [<c01d2b1b>] [<c011b71b>]
[<c01051e0>] [<c01051e0>] [<c010ac98>] [<c01051e0>] [<c01051e0>]
[<c0105292>] [<c0105000>]
Code: 89 42 1c 8b 53 18 8b 43 1c 89 10 c7 43 4c 00 00 00 00 8b 41

>>EIP; c01f8133 <tcp_timewait_kill+83/e0> <=====
Trace; c01f82c8 <tcp_timewait_state_process+138/360>
Trace; c01d8694 <qdisc_restart+14/170>
Trace; c01d241e <dev_queue_xmit+14e/320>
Trace; c01e1aa2 <ip_output+e2/130>
Trace; c01e270b <ip_build_xmit+2bb/350>
Trace; c01e1e24 <ip_queue_xmit+334/470>
Trace; c01d26dc <netif_rx+8c/100>
Trace; c01cee9c <kfree_skbmem+c/70>
Trace; c01cefd7 <__kfree_skb+d7/e0>
Trace; c01edad4 <tcp_data_queue+424/ab0>
Trace; c01ec8a4 <tcp_ack+a4/330>
Trace; c01ea268 <tcp_init_buffer_space+38/100>
Trace; c01ce929 <sock_def_readable+39/70>
Trace; c01f94fd <tcp_child_process+4d/a0>
Trace; c01cfe84 <skb_checksum+54/2d0>
Trace; c01f683d <tcp_v4_do_rcv+bd/120>
Trace; c01f6e00 <tcp_v4_rcv+560/650>
Trace; c01df417 <ip_local_deliver+e7/160>
Trace; c01df794 <ip_rcv+304/380>
Trace; c01a1571 <speedo_rx+2f1/310>
Trace; c01d2b1b <net_rx_action+17b/290>
Trace; c011b71b <do_softirq+7b/e0>
Trace; c01089bd <do_IRQ+dd/f0>
Trace; c01051e0 <default_idle+0/40>
Trace; c01051e0 <default_idle+0/40>
Trace; c010ac98 <call_do_IRQ+5/d>
Trace; c01051e0 <default_idle+0/40>
Trace; c01051e0 <default_idle+0/40>
Trace; c010520c <default_idle+2c/40>
Trace; c0105292 <cpu_idle+52/70>
Trace; c0105000 <_stext+0/0>
Code; c01f8133 <tcp_timewait_kill+83/e0>
00000000 <_EIP>:
Code; c01f8133 <tcp_timewait_kill+83/e0> <=====
0: 89 42 1c mov %eax,0x1c(%edx) <=====
Code; c01f8136 <tcp_timewait_kill+86/e0>
3: 8b 53 18 mov 0x18(%ebx),%edx
Code; c01f8139 <tcp_timewait_kill+89/e0>
6: 8b 43 1c mov 0x1c(%ebx),%eax
Code; c01f813c <tcp_timewait_kill+8c/e0>
9: 89 10 mov %edx,(%eax)
Code; c01f813e <tcp_timewait_kill+8e/e0>
b: c7 43 4c 00 00 00 00 movl $0x0,0x4c(%ebx)
Code; c01f8145 <tcp_timewait_kill+95/e0>
12: 8b 41 00 mov 0x0(%ecx),%eax

<0>Kernel panic: Aiee, killing interrupt handler!

3 warnings issued. Results may not be reliable.

----- End forwarded message -----

Yusuf Goolamabbas
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