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Subject2.4.19-pre5-ac3 + 00_lowlatency-fixes-5 Oops
Hello lkml,
Oops occured while doing dd if=/dev/hda1 of=/dev/hdb1. The system was
somewhat usable after the Oops, but then things started to crash. XMMS went as
soo as it occured. There was no info in syslog about the programs crashing.
I've attached the kysmoops output.

ps. Im not anywhere near a kernel hacker, but will try whatever people suggest
ksymoops 2.4.3 on i586 2.4.19-pre5-ac3. Options used
-V (default)
-k /proc/ksyms (default)
-l /proc/modules (default)
-o /lib/modules/2.4.19-pre5-ac3/ (default)
-m /boot/ (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.

Unable to handle kernel NULL pointer dereference at virtual address 00000030
*pde = 00000000
Oops: 0002
CPU: 0
EIP: 0010:[__make_request+1399/1552] Not tainted
EIP: 0010:[<c018f4c7>] Not tainted
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010003
eax: 00000020 ebx: d7f699e0 ecx: 00000030 edx: 00000000
esi: 00000000 edi: 00000008 ebp: c02974a4 esp: cf445db0
ds: 0018 es: 0018 ss: 0018
Process dd (pid: 1557, stackpage=cf445000)
Stack: 00002000 c02974c4 d7f69560 00000080 00000000 00000000 00000008 0002b2d8
d7f699e0 00000000 00000000 00000000 d7f56c00 502975ec 00000246 0002b18f
c02975ec 0002b18f c02975ec 00000000 00000000 00000301 00000008 cf858da0
Call Trace: [<c018f692>] [<c018f6f6>] [<c01376ac>] [<c0125e40>] [<c0125ef1>]
[<c013a1d0>] [<c0126621>] [<c0126880>] [<c0126e4d>] [<c0126d40>] [<c0134b08>]
[<c0109f52>] [<c0109f71>] [<c0108873>]
Code: c0 01 b8 2c 9e 27 c0 eb 1c 4e 75 0e ff 80

>>EIP; c018f4c6 <__make_request+576/610> <=====
Trace; c018f692 <generic_make_request+132/150>
Trace; c018f6f6 <submit_bh+46/60>
Trace; c01376ac <block_read_full_page+22c/240>
Trace; c0125e40 <add_to_page_cache_unique+70/80>
Trace; c0125ef0 <page_cache_read+a0/d0>
Trace; c013a1d0 <blkdev_get_block+0/50>
Trace; c0126620 <generic_file_readahead+110/160>
Trace; c0126880 <do_generic_file_read+210/4f0>
Trace; c0126e4c <generic_file_read+7c/140>
Trace; c0126d40 <file_read_actor+0/90>
Trace; c0134b08 <sys_read+98/e0>
Trace; c0109f52 <do_IRQ+62/a0>
Trace; c0109f70 <do_IRQ+80/a0>
Trace; c0108872 <system_call+32/40>
Code; c018f4c6 <__make_request+576/610>
00000000 <_EIP>:
Code; c018f4c6 <__make_request+576/610> <=====
0: c0 01 b8 rolb $0xb8,(%ecx) <=====
Code; c018f4c8 <__make_request+578/610>
3: 2c 9e sub $0x9e,%al
Code; c018f4ca <__make_request+57a/610>
5: 27 daa
Code; c018f4cc <__make_request+57c/610>
6: c0 eb 1c shr $0x1c,%bl
Code; c018f4ce <__make_request+57e/610>
9: 4e dec %esi
Code; c018f4d0 <__make_request+580/610>
a: 75 0e jne 1a <_EIP+0x1a> c018f4e0 <__make_request+590/610>
Code; c018f4d2 <__make_request+582/610>
c: ff 80 00 00 00 00 incl 0x0(%eax)

1 warning issued. Results may not be reliable.
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