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SubjectRe: Kernel oops!
Hi,

> > I am getting a whole lot of kernel oops, and I am not able to detect any
> > pattern. The only thing common is the machine is pretty heavily loaded
> > at that time. Am I having a hardware problem here, or is it something
> > else?

> looks like a memory problem, but i might be wrong.

Thanks for the tip. I think it is a memory problem too. Anyway, I ran
the oops text thru ksymoops (thanks, Tom). Maybe this will give a
clearer picture.

[ Am cross-posting this to the linux-kernel list. Anyone replying from
that list, please include my address in the reply. I am not on the
list. ]

========================================================================

ksymoops 0.7c on i586 2.2.16-3. Options used
-V (default)
-k /proc/ksyms (default)
-l /proc/modules (default)
-o /lib/modules/2.2.16-3/ (default)
-m /boot/System.map (specified)

Call Trace: [<c0109f0c>]
Code: 8b 54 20 24 be 00 fe ff ff 83 7a 08 00 75 12 e8 50 96 ff ff
Using defaults from ksymoops -t elf32-i386 -a i386

Trace; c0109f0c <system_call+34/38>
Code; 00000000 Before first symbol
00000000 <_EIP>:
Code; 00000000 Before first symbol
0: 8b 54 20 24 mov 0x24(%eax,1),%edx
Code; 00000004 Before first symbol
4: be 00 fe ff ff mov $0xfffffe00,%esi
Code; 00000009 Before first symbol
9: 83 7a 08 00 cmpl $0x0,0x8(%edx)
Code; 0000000d Before first symbol
d: 75 12 jne 21 <_EIP+0x21> 00000021 Before first symbol
Code; 0000000f Before first symbol
f: e8 50 96 ff ff call ffff9664 <_EIP+0xffff9664> ffff9664 <END_OF_CODE+3779b740/????>

Unable to handle kernel NULL pointer dereference at virtual address 00000024
current->tss.cr3 = 03e97000, %cr3 = 03e97000
*pde = 00000000
Oops: 0000
CPU: 0
EIP: 0010:[<c0117c48>]
EFLAGS: 00010246
eax: 00000000 ebx: 00000000 ecx: 00000001 edx: c2a66000
esi: 00000000 edi: bfffeec8 ebp: ffffffff esp: c2a67f98
ds: 0018 es: 0018 ss: 0018
Process wnlaunch (pid: 12823, process nr: 65, stackpage=c2a67000)
Stack: 00000000 bfffee78 c2a66000 40013ed0 c2a66000 c2a67fb8 c2a67fb8 c2a66000
c2a66000 c2a6608c c0109f0c ffffffff bfffeec8 00000000 00000000 00000000
bfffee78 00000072 0000002b 0000002b 00000072 400b28e9 00000023 00000202
Call Trace: [<c0109f0c>]
Code: 8b 54 24 24 be 00 fe ff ff 83 7a 08 00 75 12 e8 50 96 ff ff

>>EIP; c0117c48 <sys_wait4+2ac/304> <=====
Trace; c0109f0c <system_call+34/38>
Code; c0117c48 <sys_wait4+2ac/304>
00000000 <_EIP>:
Code; c0117c48 <sys_wait4+2ac/304> <=====
0: 8b 54 24 24 mov 0x24(%esp,1),%edx <=====
Code; c0117c4c <sys_wait4+2b0/304>
4: be 00 fe ff ff mov $0xfffffe00,%esi
Code; c0117c51 <sys_wait4+2b5/304>
9: 83 7a 08 00 cmpl $0x0,0x8(%edx)
Code; c0117c55 <sys_wait4+2b9/304>
d: 75 12 jne 21 <_EIP+0x21> c0117c69 <sys_wait4+2cd/304>
Code; c0117c57 <sys_wait4+2bb/304>
f: e8 50 96 ff ff call ffff9664 <_EIP+0xffff9664> c01112ac <schedule+0/280>

Unable to handle kernel NULL pointer dereference at virtual address 00000024
current->tss.cr3 = 03920000, %cr3 = 03920000
*pde = 00000000
Oops: 0000
CPU: 0
EIP: 0010:[<c0117c48>]
EFLAGS: 00010246
eax: 00000000 ebx: 00000000 ecx: 00000001 edx: c2a66000
esi: 00000000 edi: bfffeec8 ebp: ffffffff esp: c2a67f98
ds: 0018 es: 0018 ss: 0018
Process wnlaunch (pid: 14468, process nr: 65, stackpage=c2a67000)
Stack: 00000000 bfffee78 c2a66000 40013ed0 c2a66000 c2a67fb8 c2a67fb8 c2a66000
c2a66000 c2a6608c c0109f0c ffffffff bfffeec8 00000000 00000000 00000000
bfffee78 00000072 0000002b 0000002b 00000072 400b28e9 00000023 00000202
Call Trace: [<c0109f0c>]
Code: 8b 54 20 24 be 00 fe ff ff 83 7a 08 00 75 12 e8 50 96 ff ff

>>EIP; c0117c48 <sys_wait4+2ac/304> <=====
Trace; c0109f0c <system_call+34/38>
Code; c0117c48 <sys_wait4+2ac/304>
00000000 <_EIP>:
Code; c0117c48 <sys_wait4+2ac/304> <=====
0: 8b 54 20 24 mov 0x24(%eax,1),%edx <=====
Code; c0117c4c <sys_wait4+2b0/304>
4: be 00 fe ff ff mov $0xfffffe00,%esi
Code; c0117c51 <sys_wait4+2b5/304>
9: 83 7a 08 00 cmpl $0x0,0x8(%edx)
Code; c0117c55 <sys_wait4+2b9/304>
d: 75 12 jne 21 <_EIP+0x21> c0117c69 <sys_wait4+2cd/304>
Code; c0117c57 <sys_wait4+2bb/304>
f: e8 50 96 ff ff call ffff9664 <_EIP+0xffff9664> c01112ac <schedule+0/280>

Unable to handle kernel NULL pointer dereference at virtual address 00000024
current->tss.cr3 = 02fca000, %cr3 = 02fca000
*pde = 00000000
Oops: 0000
CPU: 0
EIP: 0010:[<c0117c48>]
EFLAGS: 00010246
eax: 00000000 ebx: 00000000 ecx: 00000001 edx: c2b84000
esi: 00000000 edi: bfffeeb8 ebp: ffffffff esp: c2b85f98
ds: 0018 es: 0018 ss: 0018
Process wnlaunch (pid: 32164, process nr: 65, stackpage=c2b85000)
Stack: 00000000 bfffee68 c2b84000 40013ed0 c2b84000 c2b85fb8 c2b85fb8 c2b84000
c2b84000 c2b8408c c0109f0c ffffffff bfffeeb8 00000000 00000000 00000000
bfffee68 00000072 0000002b 0000002b 00000072 400b28e9 00000023 00000202
Call Trace: [<c0109f0c>]
Code: 8b 54 20 24 be 00 fe ff ff 83 7a 08 00 75 12 e8 50 96 ff ff

>>EIP; c0117c48 <sys_wait4+2ac/304> <=====
Trace; c0109f0c <system_call+34/38>
Code; c0117c48 <sys_wait4+2ac/304>
00000000 <_EIP>:
Code; c0117c48 <sys_wait4+2ac/304> <=====
0: 8b 54 20 24 mov 0x24(%eax,1),%edx <=====
Code; c0117c4c <sys_wait4+2b0/304>
4: be 00 fe ff ff mov $0xfffffe00,%esi
Code; c0117c51 <sys_wait4+2b5/304>
9: 83 7a 08 00 cmpl $0x0,0x8(%edx)
Code; c0117c55 <sys_wait4+2b9/304>
d: 75 12 jne 21 <_EIP+0x21> c0117c69 <sys_wait4+2cd/304>
Code; c0117c57 <sys_wait4+2bb/304>
f: e8 50 96 ff ff call ffff9664 <_EIP+0xffff9664> c01112ac <schedule+0/280>

Unable to handle kernel NULL pointer dereference at virtual address 00000024
current->tss.cr3 = 02fca000, %cr3 = 02fca000
*pde = 00000000
Oops: 0000
CPU: 0
EIP: 0010:[<c0117c48>]
EFLAGS: 00010246
eax: 00000000 ebx: 00000000 ecx: 00000001 edx: c3cbe000
esi: 00000000 edi: bfffeeb8 ebp: ffffffff esp: c3cbff98
ds: 0018 es: 0018 ss: 0018
Process wnlaunch (pid: 9060, process nr: 65, stackpage=c3cbf000)
Stack: 00000000 bfffee68 c3cbe000 40013ed0 c3cbe000 c3cbffb8 c3cbffb8 c3cbe000
c3cbe000 c3cbe08c c0109f0c ffffffff bfffeeb8 00000000 00000000 00000000
bfffee68 00000072 0000002b 0000002b 00000072 400b28e9 00000023 00000202
Call Trace: [<c0109f0c>]
Code: 8b 54 20 24 be 00 fe ff ff 83 7a 08 00 75 12 e8 50 96 ff ff

>>EIP; c0117c48 <sys_wait4+2ac/304> <=====
Trace; c0109f0c <system_call+34/38>
Code; c0117c48 <sys_wait4+2ac/304>
00000000 <_EIP>:
Code; c0117c48 <sys_wait4+2ac/304> <=====
0: 8b 54 20 24 mov 0x24(%eax,1),%edx <=====
Code; c0117c4c <sys_wait4+2b0/304>
4: be 00 fe ff ff mov $0xfffffe00,%esi
Code; c0117c51 <sys_wait4+2b5/304>
9: 83 7a 08 00 cmpl $0x0,0x8(%edx)
Code; c0117c55 <sys_wait4+2b9/304>
d: 75 12 jne 21 <_EIP+0x21> c0117c69 <sys_wait4+2cd/304>
Code; c0117c57 <sys_wait4+2bb/304>
f: e8 50 96 ff ff call ffff9664 <_EIP+0xffff9664> c01112ac <schedule+0/280>

Unable to handle kernel NULL pointer dereference at virtual address 00000024
current->tss.cr3 = 077c6000, %cr3 = 077c6000
*pde = 00000000
Oops: 0000
CPU: 0
EIP: 0010:[<c0117c48>]
EFLAGS: 00010246
eax: 00000000 ebx: 00000000 ecx: 00000001 edx: c3cbe000
esi: 00000000 edi: bfffeeb8 ebp: ffffffff esp: c3cbff98
ds: 0018 es: 0018 ss: 0018
Process wnlaunch (pid: 9240, process nr: 65, stackpage=c3cbf000)
Stack: 00000000 bfffee68 c3cbe000 40013ed0 c3cbe000 c3cbffb8 c3cbffb8 c3cbe000
c3cbe000 c3cbe08c c0109f0c ffffffff bfffeeb8 00000000 00000000 00000000
bfffee68 00000072 0000002b 0000002b 00000072 400b28e9 00000023 00000202
Call Trace: [<c0109f0c>]
Code: 8b 54 20 24 be 00 fe ff ff 83 7a 08 00 75 12 e8 50 96 ff ff

>>EIP; c0117c48 <sys_wait4+2ac/304> <=====
Trace; c0109f0c <system_call+34/38>
Code; c0117c48 <sys_wait4+2ac/304>
00000000 <_EIP>:
Code; c0117c48 <sys_wait4+2ac/304> <=====
0: 8b 54 20 24 mov 0x24(%eax,1),%edx <=====
Code; c0117c4c <sys_wait4+2b0/304>
4: be 00 fe ff ff mov $0xfffffe00,%esi
Code; c0117c51 <sys_wait4+2b5/304>
9: 83 7a 08 00 cmpl $0x0,0x8(%edx)
Code; c0117c55 <sys_wait4+2b9/304>
d: 75 12 jne 21 <_EIP+0x21> c0117c69 <sys_wait4+2cd/304>
Code; c0117c57 <sys_wait4+2bb/304>
f: e8 50 96 ff ff call ffff9664 <_EIP+0xffff9664> c01112ac <schedule+0/280>

Unable to handle kernel NULL pointer dereference at virtual address 00000024
current->tss.cr3 = 04016000, %cr3 = 04016000
*pde = 00000000
Oops: 0000
CPU: 0
EIP: 0010:[<c0117c48>]
EFLAGS: 00010246
eax: 00000000 ebx: 00000000 ecx: 00000001 edx: c3c94000
esi: 00000000 edi: bfffe8a8 ebp: ffffffff esp: c3c95f98
ds: 0018 es: 0018 ss: 0018
Process word (pid: 18238, process nr: 77, stackpage=c3c95000)
Stack: 00000000 bfffe858 c3c94000 0809dd50 c3c94000 c3c95fb8 c3c95fb8 c3c94000
c3c94000 c3c9408c c0109f0c ffffffff bfffe8a8 00000000 00000000 00000000
bfffe858 00000072 0000002b 0000002b 00000072 400b28e9 00000023 00000202
Call Trace: [<c0109f0c>]
Code: 8b 54 20 24 be 00 fe ff ff 83 7a 08 00 75 12 e8 50 96 ff ff

>>EIP; c0117c48 <sys_wait4+2ac/304> <=====
Trace; c0109f0c <system_call+34/38>
Code; c0117c48 <sys_wait4+2ac/304>
00000000 <_EIP>:
Code; c0117c48 <sys_wait4+2ac/304> <=====
0: 8b 54 20 24 mov 0x24(%eax,1),%edx <=====
Code; c0117c4c <sys_wait4+2b0/304>
4: be 00 fe ff ff mov $0xfffffe00,%esi
Code; c0117c51 <sys_wait4+2b5/304>
9: 83 7a 08 00 cmpl $0x0,0x8(%edx)
Code; c0117c55 <sys_wait4+2b9/304>
d: 75 12 jne 21 <_EIP+0x21> c0117c69 <sys_wait4+2cd/304>
Code; c0117c57 <sys_wait4+2bb/304>
f: e8 50 96 ff ff call ffff9664 <_EIP+0xffff9664> c01112ac <schedule+0/280>

Unable to handle kernel NULL pointer dereference at virtual address 00000024
current->tss.cr3 = 06274000, %cr3 = 06274000
*pde = 00000000
Oops: 0000
CPU: 0
EIP: 0010:[<c0117c48>]
EFLAGS: 00010246
eax: 00000000 ebx: 00000000 ecx: 00000001 edx: c7314000
esi: 00000000 edi: bfffeef8 ebp: ffffffff esp: c7315f98
ds: 0018 es: 0018 ss: 0018
Process wnlaunch (pid: 672, process nr: 60, stackpage=c7315000)
Stack: 00000000 bfffeea8 c7314000 40013ed0 c7314000 c7315fb8 c7315fb8 c7314000
c7314000 c731408c c0109f0c ffffffff bfffeef8 00000000 00000000 00000000
bfffeea8 00000072 0000002b 0000002b 00000072 400b28e9 00000023 00000202
Call Trace: [<c0109f0c>]
Code: 8b 54 20 24 be 00 fe ff ff 83 7a 08 00 75 12 e8 50 96 ff ff

>>EIP; c0117c48 <sys_wait4+2ac/304> <=====
Trace; c0109f0c <system_call+34/38>
Code; c0117c48 <sys_wait4+2ac/304>
00000000 <_EIP>:
Code; c0117c48 <sys_wait4+2ac/304> <=====
0: 8b 54 20 24 mov 0x24(%eax,1),%edx <=====
Code; c0117c4c <sys_wait4+2b0/304>
4: be 00 fe ff ff mov $0xfffffe00,%esi
Code; c0117c51 <sys_wait4+2b5/304>
9: 83 7a 08 00 cmpl $0x0,0x8(%edx)
Code; c0117c55 <sys_wait4+2b9/304>
d: 75 12 jne 21 <_EIP+0x21> c0117c69 <sys_wait4+2cd/304>
Code; c0117c57 <sys_wait4+2bb/304>
f: e8 50 96 ff ff call ffff9664 <_EIP+0xffff9664> c01112ac <schedule+0/280>

Unable to handle kernel NULL pointer dereference at virtual address 00000024
current->tss.cr3 = 06eb3000, %cr3 = 06eb3000
*pde = 00000000
Oops: 0000
CPU: 0
EIP: 0010:[<c0117c48>]
EFLAGS: 00010246
eax: 00000000 ebx: 00000000 ecx: 00000001 edx: c59d8000
esi: 00000000 edi: bfffe30c ebp: ffffffff esp: c59d9f98
ds: 0018 es: 0018 ss: 0018
Process word (pid: 9897, process nr: 64, stackpage=c59d9000)
Stack: 00000000 bfffe2bc c59d8000 080a1170 c59d8000 c59d9fb8 c59d9fb8 c59d8000
c59d8000 c59d808c c0109f0c ffffffff bfffe30c 00000000 00000000 00000000
bfffe2bc 00000072 0000002b 0000002b 00000072 400b28e9 00000023 00000202
Call Trace: [<c0109f0c>]
Code: 8b 54 20 24 be 00 fe ff ff 83 7a 08 00 75 12 e8 50 96 ff ff

>>EIP; c0117c48 <sys_wait4+2ac/304> <=====
Trace; c0109f0c <system_call+34/38>
Code; c0117c48 <sys_wait4+2ac/304>
00000000 <_EIP>:
Code; c0117c48 <sys_wait4+2ac/304> <=====
0: 8b 54 20 24 mov 0x24(%eax,1),%edx <=====
Code; c0117c4c <sys_wait4+2b0/304>
4: be 00 fe ff ff mov $0xfffffe00,%esi
Code; c0117c51 <sys_wait4+2b5/304>
9: 83 7a 08 00 cmpl $0x0,0x8(%edx)
Code; c0117c55 <sys_wait4+2b9/304>
d: 75 12 jne 21 <_EIP+0x21> c0117c69 <sys_wait4+2cd/304>
Code; c0117c57 <sys_wait4+2bb/304>
f: e8 50 96 ff ff call ffff9664 <_EIP+0xffff9664> c01112ac <schedule+0/280>

======================================================================

Thanks,
Venky.

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