NULL pointer reference problem
"Umaid Singh Rajpurohit" <[email protected]> 5 Apr 2002 06:01:50 -0000
| Newsgroups | gmane.linux.redhat.axp.kernel |
|---|---|
| Message-ID | <[email protected]> |
I am running clearcase on RedHat Linux 7.1
(kernel 2.4.2) on IBM
Xseries one U servers that has
two CPU's here is
cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 11
model name : Intel(R) Pentium(R) III
CPU family 1133MHz
stepping : 1
cpu MHz : 1128.593
cache size : 512 KB
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae
mce cx8 apic sep mtrr pge
mca cmov pat pse36 mmx fxsr sse
bogomips : 2254.43
processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 11
model name : Intel(R) Pentium(R) III
CPU family 1133MHz
stepping : 1
cpu MHz : 1128.593
cache size : 512 KB
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae
mce cx8 apic sep mtrr pge
mca cmov pat pse36 mmx fxsr sse
bogomips : 2254.43
here is memory information
cat /proc/iomem
00000000-0009dbff : System RAM
0009dc00-0009ffff : reserved
000a0000-000bffff : Video RAM area
000c0000-000c7fff : Video ROM
000cb000-000cc7ff : Extension ROM
000cc800-000d19ff : Extension ROM
000f0000-000fffff : System ROM
00100000-5ffec33f : System RAM
00100000-00277227 : Kernel code
00277228-00290f5f : Kernel data
5ffec340-5ffeffff : ACPI Tables
5fff0000-5fffffff : reserved
effff000-efffffff : Adaptec 7892P
f0000000-f7ffffff : S3 Inc. Savage 4
fe900000-fe9fffff : Intel Corporation 82557
[Ethernet Pro 100] (#2)
fea00000-feafffff : Intel Corporation 82557
[Ethernet Pro 100]
feb7d000-feb7dfff : PCI device 1166:0220
(ServerWorks)
feb7d000-feb7dfff : usb-ohci
feb7e000-feb7efff : Intel Corporation 82557
[Ethernet Pro 100] (#2)
feb7e000-feb7efff : eepro100
feb7f000-feb7ffff : Intel Corporation 82557
[Ethernet Pro 100]
feb7f000-feb7ffff : eepro100
feb80000-febfffff : S3 Inc. Savage 4
fec00000-ffffffff : reserved
Here is uname -a
Linux 2.4.2-2smp #1 SMP Sun Apr 8 20:21:34
EDT 2001 i686 unknown
I have more then sufficient physical memory
and swap space
Here is some swap space detail form top
Mem: 1543868K av, 507684K used, 1036184K
free, 0K shrd, 317576K
buff
Swap: 5116576K av, 0K used, 5116576K
free 33076K
cached
I am running n number of IBM X
Series server every now and
then
one or two servers crashes and don't allow
me to do anything except
reset.
The /var/log/messages says something like:
Jan 6 17:59:45 kernel: Unable to handle
kernel NULL pointer
dereference at virtual address 00000014
Jan 6 17:59:45 kernel: printing eip:
Jan 6 17:59:45 kernel: f8b510b2
Jan 6 17:59:45 kernel: pgd entry eb571000:
0000000000000000
Jan 6 17:59:45 kernel: pmd entry eb571000:
0000000000000000
Jan 6 17:59:45 kernel: ... pmd not
present!
Jan 6 17:59:45 kernel: Oops: 0000
Jan 6 17:59:45 kernel: CPU: 1
Jan 6 17:59:45 kernel: EIP:
0010:[<f8b510b2>]
Jan 6 17:59:45 kernel: EFLAGS: 00010246
Jan 6 17:59:45 kernel: eax: d951f220
ebx: 00000040 ecx: c027e140
edx: 00000000
Jan 6 17:59:45 kernel: esi: 00000000
edi: ea10fe60 ebp: ea10fe20
esp: ea10fde8
Jan 6 17:59:45 kernel: ds: 0018 es: 0018
ss: 0018
Jan 6 17:59:45 kernel: Process tcsh (pid:
31185, stackpage=ea10f000)
Jan 6 17:59:45 kernel: Stack: 00000040
f68c86c4 ea10fea0 d32e2ca0
00000040 f68c86c4 ea10fea0 00000000
Jan 6 17:59:45 kernel: 00000000
00000000 f68c86c4 d951f220
00029508 00000002 ea10fe70 f8b4c6cf
Jan 6 17:59:45 kernel: 00000001
ea10fe60 d32e2ca0 f8b4c423
00000040 f68c86c4 d32e2ca0 000079d1
Jan 6 17:59:45 kernel: Call Trace:
[<f8b4c6cf>] [<f8b4c423>]
[<f8b56034>] [<f8b8a764>] [<f8b4d497>]
[<f8b754cc>] [<f8b7042a>]
Jan 6 17:59:45 kernel: [<f8b70420>]
[<f8b6fbef>] [dput+59/416]
[permission+69/144] [<f8b6ee70>]
[path_walk+2392/2432]
[__user_walk+58/96] [sys_stat64+19/112]
Jan 6 17:59:45 kernel: [<f8b70420>]
[<f8b6fbef>] [<c014e8cb>]
[<c01458a5>] [<f8b6ee70>] [<c01465f8>]
[<c0146b0a>] [<c0143143>]
Jan 6 17:59:45 kernel:
[error_code+52/60] [system_call+51/56]
Jan 6 17:59:45 kernel: [<c0109300>]
[<c01091cb>]
Jan 6 17:59:45 kernel:
Jan 6 17:59:45 kernel: Code: 83 7e 14 06
0f 85 f7 00 00 00 83 c4 f8 6a
00 56 e8 3d a8 ff
Jan 6 17:59:45 kernel: Unable to handle
kernel NULL pointer
dereference at virtual address 00000014
Jan 6 17:59:45 kernel: printing eip:
Jan 6 17:59:45 kernel: f8b510b2
Jan 6 17:59:45 kernel: pgd entry d4f8d000:
0000000000000000
Jan 6 17:59:45 kernel: pmd entry d4f8d000:
0000000000000000
Jan 6 17:59:45 kernel: ... pmd not
present!
Jan 6 17:59:45 kernel: Oops: 0000
Jan 6 17:59:45 kernel: CPU: 0
Jan 6 17:59:45 kernel: EIP:
0010:[<f8b510b2>]
Jan 6 17:59:45 kernel: EFLAGS: 00010246
Jan 6 17:59:45 kernel: eax: d951f220
ebx: 00000040 ecx: c027e140
edx: 00000000
Jan 6 17:59:45 kernel: esi: 00000000
edi: e6041e60 ebp: e6041e20
esp: e6041de8
Jan 6 17:59:45 kernel: ds: 0018 es: 0018
ss: 0018
Jan 6 17:59:45 kernel: Process tcsh (pid:
31184, stackpage=e6041000)
Jan 6 17:59:45 kernel: Stack: 00000040
f68c8ec8 e6041ea0 eca3ace0
00000040 f68c8ec8 e6041ea0 00000000
Jan 6 17:59:45 kernel: 00000000
00000000 f68c8ec8 d951f220
00029508 00000002 e6041e70 f8b4c6cf
Jan 6 17:59:45 kernel: 00000001
e6041e60 eca3ace0 f8b4c423
00000040 f68c8ec8 eca3ace0 000079d0
Jan 6 17:59:45 kernel: Call Trace:
[<f8b4c6cf>] [<f8b4c423>]
[<f8b56034>] [<f8b8a764>] [<f8b4d497>]
[<f8b754cc>] [<f8b7042a>]
Jan 6 17:59:45 kernel: [<f8b70420>]
[<f8b6fbef>] [dput+59/416]
[permission+69/144] [<f8b6ee70>]
[path_walk+2392/2432]
[__user_walk+58/96] [sys_stat64+19/112]
Jan 6 17:59:45 kernel: [<f8b70420>]
[<f8b6fbef>] [<c014e8cb>]
[<c01458a5>] [<f8b6ee70>] [<c01465f8>]
[<c0146b0a>] [<c0143143>]
I am unable to find any information
on it.Can any one help me
out.