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SubjectOops in kswapd of linux-2.4.8-ac5
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Before this Oops the kernel was running for 22 days with high load.
I'm pretty sure, at that time some of the swap space was actually in
use, no idea how much. It's an SMP box with 4 SCSI disks. Each disk
has a swap partition:

# swapon -s
Filename Type Size Used Priority
/dev/sda3 partition 1004052 0 -1
/dev/sdb3 partition 1004052 0 -2
/dev/sdc3 partition 1004052 0 -3
/dev/sdd3 partition 1004052 0 -4

(I realize now that I forgot the pri= option in /etc/fstab)

The box was pingable but not available for connecting, so the ksymoops
was run on the /var/log/messages file after rebooting.

Please let me know if you need further details.

# ksymoops /var/log/messages
ksymoops 0.7c on i686 2.4.8-ac5. Options used
-V (default)
-k /proc/ksyms (default)
-l /proc/modules (default)
-o /lib/modules/2.4.8-ac5/ (default)
-m /usr/src/linux/System.map (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): mismatch on symbol partition_name , ksyms_base says c01f04f0, System.map says c0153330. Ignoring ksyms_base entry
Aug 15 00:23:37 k77 kernel: cpu: 0, clocks: 995643, slice: 331881
Aug 15 00:23:37 k77 kernel: cpu: 1, clocks: 995643, slice: 331881
Aug 15 11:08:13 k77 kernel: cpu: 0, clocks: 995651, slice: 331883
Aug 15 11:08:13 k77 kernel: cpu: 1, clocks: 995651, slice: 331883
Aug 15 12:54:03 k77 kernel: cpu: 0, clocks: 995665, slice: 331888
Aug 15 12:54:03 k77 kernel: cpu: 1, clocks: 995665, slice: 331888
Aug 15 13:10:16 k77 kernel: cpu: 0, clocks: 995726, slice: 331908
Aug 15 13:10:16 k77 kernel: cpu: 1, clocks: 995726, slice: 331908
Aug 15 13:41:59 sb11 kernel: cpu: 0, clocks: 995652, slice: 331884
Aug 15 13:41:59 sb11 kernel: cpu: 1, clocks: 995652, slice: 331884
Aug 23 14:33:10 sb11 kernel: cpu: 0, clocks: 995576, slice: 331858
Aug 23 14:33:10 sb11 kernel: cpu: 1, clocks: 995576, slice: 331858
Aug 23 14:43:31 sb11 kernel: cpu: 0, clocks: 995715, slice: 331905
Aug 23 14:43:31 sb11 kernel: cpu: 1, clocks: 995715, slice: 331905
Aug 23 14:46:47 sb11 kernel: cpu: 0, clocks: 995648, slice: 331882
Aug 23 14:46:47 sb11 kernel: cpu: 1, clocks: 995648, slice: 331882
Aug 23 13:23:23 sb11 kernel: cpu: 0, clocks: 995712, slice: 331904
Aug 23 13:23:23 sb11 kernel: cpu: 1, clocks: 995712, slice: 331904
Sep 15 15:29:13 sb11 kernel: invalid operand: 0000
Sep 15 15:29:13 sb11 kernel: CPU: 1
Sep 15 15:29:13 sb11 kernel: EIP: 0010:[prune_dcache+131/352]
Sep 15 15:29:13 sb11 kernel: EFLAGS: 00010202
Sep 15 15:29:13 sb11 kernel: eax: 0400dc3e ebx: ccf63ab8 ecx: ecdc0ee0 edx: df9b1d38
Sep 15 15:29:13 sb11 kernel: esi: ccf63aa0 edi: c1eef060 ebp: ffffaafe esp: f7f45f68
Sep 15 15:29:13 sb11 kernel: ds: 0018 es: 0018 ss: 0018
Sep 15 15:29:13 sb11 kernel: Process kswapd (pid: 5, stackpage=f7f45000)
Sep 15 15:29:13 sb11 kernel: Stack: c012cfeb 00000001 00000000 00000185 0000f8ae 00000000 c028fd20 00000000
Sep 15 15:29:13 sb11 kernel: 00000000 0000031b c012d8ed 00000185 00000185 000000c0 00000000 0008e000
Sep 15 15:29:13 sb11 kernel: c0148bd1 00000000 c012dbc7 00000000 000000c0 000000c0 00000000 ffffffff
Sep 15 15:29:13 sb11 kernel: Call Trace: [do_page_launder+315/2096] [free_shortage+13/48] [shrink_dcache_memory+33/64] [do_try_to_free_pages+39/96] [kswapd+89/256]
Sep 17 11:46:21 sb11 kernel: cpu: 0, clocks: 995641, slice: 331880
Sep 17 11:46:21 sb11 kernel: cpu: 1, clocks: 995641, slice: 331880

2 warnings issued. Results may not be reliable.


--
andreas
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