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[1.] One line summary of the problem:    

PROBLEM: various oops's in 2.2.19 SMP kernel.

[2.] Full description of the problem/report:

The machine runs along fine for a couple of weeks, and will eventually hang
with an oops. I have had this happen approximately 5 times to date with
different 2.2.x kernels, but have not reported it until now. The ooops's are
not always the same.

Latest oops (2.2.19 SMP)
-------------------------------------------
Unable to handle kernel NULL pointer dereference at virtual address 00000100
current->tss.cr3 = 1c6ad000, %%cr3 = 1c6ad000
*pde = 00000000
Oops: 0000
CPU: 0
EIP: 0010:[find_buffer+104/144]
EFLAGS: 00010206
eax: 00000100 ebx: 00000007 ecx: 0005ff98 edx: 00000100
esi: 0000000d edi: 00003006 ebp: 0003198f esp: e426dee4
ds: 0018 es: 0018 ss: 0018
Process postmaster (pid: 13314, process nr: 30, stackpage=e426d000)
Stack: edffc498 00000000 0005ff98 c012bd04 00003006 0003198f 00001000 00000000
c0142d42 00003006 0003198f 00001000 000003fc 00000000 c0142ece edffc498
d9eecff0 00000000 0000001b 00000000 edffc498 00000000 d18c5320 c0142f4e
Call Trace: [get_hash_table+24/76] [sync_block+46/216] [sync_indirect+78/128] [sync_dindirect+78/128] [ext2_sync_file+103/164] [sys_fsync+143/200] [system_call+52/56] [_stext+43/164]
-------------------------------------------

An older oops (2.2.16 SMP (redhat's kernel - redhats patches))
-------------------------------------------
Unable to handle kernel NULL pointer dereference at virtual address 00000134
current->tss.cr3 = 03b8f000, %%cr3 = 03b8f000
*pde = 00000000
Oops: 0002
CPU: 1
EIP: 0010:[remove_from_queues+169/328]
EFLAGS: 00010206
eax: 00000100 ebx: de47ae40 ecx: de47ae40 edx: e4b886c0
esi: 0000000c edi: 00000000 ebp: 00000007 esp: c2339ed0
ds: 0018 es: 0018 ss: 0018
Process postmaster (pid: 18747, process nr: 54, stackpage=c2339000)
Stack: 0007a671 c012b752 de47ae40 de47ae40 ece48420 c012bf5a de47ae40 c0148b19
de47ae40 00000000 eb28c000 00000000 eb28c0d0 00001000 ec54d0b8 00000008
00000400 0007a66a 00000000 0000002e c0148edf eb28c000 0000000c eb28c0cc
Call Trace: [put_last_free+50/124] [__bforget+34/40] [trunc_indirect+505/692] [ext2_truncate+107/516] [do_truncate+85/132] [do_truncate+105/132] [filp_open+172/240] [sys_ftruncate+322/368] [system_call+52/56]
Code: 89 50 34 c7 01 00 00 00 00 89 02 c7 41 34 00 00 00 00 ff 0d

-------------------------------------------

THe machine is a dual CPU (both PIII 500's) SMP machine with a Mylex DAC960
raid controller

[3.] Keywords (i.e., modules, networking, kernel):

linux kernel 2.2.19 SMP oops 0000 [find_buffer+104/144]

loaded modules:
3c59x
DAC960

[4.] Kernel version (from /proc/version):

Linux version 2.2.19 (root@deathstar.gkg-com.com) (gcc version egcs-2.91.66 19990314/Linux (egcs-1.1.2 release)) #1 SMP Fri Apr 27 10:49:53 CDT 2001

[5.] Output of Oops.. message (if applicable) with symbolic information
resolved (see Documentation/oops-tracing.txt)

-----------------------------------------------------------------------
Latest oops (2.2.19 SMP vanilla)

Options used: -V (default)
-o /lib/modules/2.2.19/ (default)
-k /proc/ksyms (default)
-l /proc/modules (default)
-m /boot/System.map (specified)
-c 1 (default)

Unable to handle kernel NULL pointer dereference at virtual address 00000134
current->tss.cr3 = 03b8f000, %%cr3 = 03b8f000
*pde = 00000000
Oops: 0002
CPU: 1
EIP: 0010:[remove_from_queues+169/328]
EFLAGS: 00010206
eax: 00000100 ebx: de47ae40 ecx: de47ae40 edx: e4b886c0
esi: 0000000c edi: 00000000 ebp: 00000007 esp: c2339ed0
ds: 0018 es: 0018 ss: 0018
Process postmaster (pid: 18747, process nr: 54, stackpage=c2339000)
Stack: 0007a671 c012b752 de47ae40 de47ae40 ece48420 c012bf5a de47ae40 c0148b19
de47ae40 00000000 eb28c000 00000000 eb28c0d0 00001000 ec54d0b8 00000008
00000400 0007a66a 00000000 0000002e c0148edf eb28c000 0000000c eb28c0cc
Call Trace: [put_last_free+50/124] [__bforget+34/40] [trunc_indirect+505/692] [ext2_truncate+107/516] [do_truncate+85/132] [do_truncate+105/132] [filp_open+172/240] [sys_ftruncate+322/368] [system_call+52/56]
Code: 89 50 34 c7 01 00 00 00 00 89 02 c7 41 34 00 00 00 00 ff 0d

Code: 00000000 Before first symbol 00000000 <_IP>: <===
Code: 00000000 Before first symbol 0: 89 50 34 mov %edx,0x34(%eax) <===
Code: 00000003 Before first symbol 3: c7 01 00 00 00 00 movl $0x0,(%ecx)
Code: 00000009 Before first symbol 9: 89 02 mov %eax,(%edx)
Code: 0000000b Before first symbol b: c7 41 34 00 00 00 00 movl $0x0,0x34(%ecx)
Code: 00000012 Before first symbol 12: ff 0d 00 00 00 00 decl 0x0

833 warnings issued. Results may not be reliable.

-----------------------------------------------------------------------
Older oops (2.2.16-3 SMP (redhat stock)

Options used: -V (default)
-o /lib/modules/2.2.19/ (default)
-k /proc/ksyms (default)
-l /proc/modules (default)
-m /boot/System.map-2.2.16-3smp (specified)
-c 1 (default)

Unable to handle kernel NULL pointer dereference at virtual address 00000134
current->tss.cr3 = 03b8f000, %%cr3 = 03b8f000
*pde = 00000000
Oops: 0002
CPU: 1
EIP: 0010:[remove_from_queues+169/328]
EFLAGS: 00010206
eax: 00000100 ebx: de47ae40 ecx: de47ae40 edx: e4b886c0
esi: 0000000c edi: 00000000 ebp: 00000007 esp: c2339ed0
ds: 0018 es: 0018 ss: 0018
Process postmaster (pid: 18747, process nr: 54, stackpage=c2339000)
Stack: 0007a671 c012b752 de47ae40 de47ae40 ece48420 c012bf5a de47ae40 c0148b19
de47ae40 00000000 eb28c000 00000000 eb28c0d0 00001000 ec54d0b8 00000008
00000400 0007a66a 00000000 0000002e c0148edf eb28c000 0000000c eb28c0cc
Call Trace: [put_last_free+50/124] [__bforget+34/40] [trunc_indirect+505/692] [ext2_truncate+107/516] [do_truncate+85/132] [do_truncate+105/132] [filp_open+172/240] [sys_ftruncate+322/
368] [system_call+52/56]
Code: 89 50 34 c7 01 00 00 00 00 89 02 c7 41 34 00 00 00 00 ff 0d

Code: 00000000 Before first symbol 00000000 <_IP>: <===
Code: 00000000 Before first symbol 0: 89 50 34 mov %edx,0x34(%eax) <===
Code: 00000003 Before first symbol 3: c7 01 00 00 00 00 movl $0x0,(%ecx)
Code: 00000009 Before first symbol 9: 89 02 mov %eax,(%edx)
Code: 0000000b Before first symbol b: c7 41 34 00 00 00 00 movl $0x0,0x34(%ecx)
Code: 00000012 Before first symbol 12: ff 0d 00 00 00 00 decl 0x0


843 warnings issued. Results may not be reliable.

[6.] A small shell script or example program which triggers the
problem (if possible)

Not applicable. Cant reproduce easily. The oops's have been happening
anytime after 3 to 6 weeks of uptime.

[7.] Environment

Machine is an SMP dual PIII 500 machine with 768MB RAM,
Mylex DAC960 RAID controller in RAID 5 configuration with
5 active disks, 1 standby disk.

this machine functions as a postgresql (7.0.3) server. Nothing else signifigant
is running on this machine. The machine is running redhat 6.2 with all of the
released updates applied, and is running a stock 2.2.19 kernel that was
downloaded from ftp.us.kernel.org and was compiled on this same machine.

[7.1.] Software (add the output of the ver_linux script here)

Linux deathstar.gkg-com.com 2.2.19 #1 SMP Fri Apr 27 10:49:53 CDT 2001 i686 unknown

Gnu C egcs-2.91.66
Gnu make 3.78.1
binutils 2.9.5.0.22
util-linux 2.10r
modutils 2.3.21
e2fsprogs 1.18
pcmcia-cs 3.1.8
Linux C Library 2.1.3
Dynamic linker (ldd) 2.1.3
Procps 2.0.6
Net-tools 1.54
Console-tools 0.3.3
Sh-utils 2.0
Modules Loaded 3c59x DAC960

[7.2.] Processor information (from /proc/cpuinfo):

processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 7
model name : Pentium III (Katmai)
stepping : 3
cpu MHz : 501.147
cache size : 512 KB
fdiv_bug : no
hlt_bug : no
sep_bug : no
f00f_bug : no
coma_bug : no
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 xmm
bogomips : 999.42

processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 7
model name : Pentium III (Katmai)
stepping : 3
cpu MHz : 501.147
cache size : 512 KB
fdiv_bug : no
hlt_bug : no
sep_bug : no
f00f_bug : no
coma_bug : no
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 xmm
bogomips : 999.42

[7.3.] Module information (from /proc/modules):

3c59x 22480 2 (autoclean)
DAC960 60848 3

[7.4.] SCSI information (from /proc/scsi/scsi)

/proc/scsi/scsi:
Attached devices: none

/proc/rd/c0/current_status:
***** DAC960 RAID Driver Version 2.2.10 of 1 February 2001 *****
Copyright 1998-2001 by Leonard N. Zubkoff <lnz@dandelion.com>
Configuring Mylex DAC960PTL1 PCI RAID Controller
Firmware Version: 4.07-0-29, Channels: 1, Memory Size: 8MB
PCI Bus: 0, Device: 18, Function: 1, I/O Address: Unassigned
PCI Address: 0xFC8FE000 mapped at 0xF0810000, IRQ Channel: 18
Controller Queue Depth: 124, Maximum Blocks per Command: 128
Driver Queue Depth: 123, Scatter/Gather Limit: 33 of 33 Segments
Stripe Size: 64KB, Segment Size: 8KB, BIOS Geometry: 255/63
Physical Devices:
0:0 Vendor: SEAGATE Model: ST39175LW Revision: 0001
Serial Number: 3AL0NXK100007008KQ52
Disk Status: Online, 17782784 blocks
0:1 Vendor: SEAGATE Model: ST39175LW Revision: 0001
Serial Number: 3AL0P60T00007012R69K
Disk Status: Online, 17782784 blocks
0:2 Vendor: SEAGATE Model: ST39175LW Revision: 0001
Serial Number: 3AL0P4VE00007012R7QV
Disk Status: Online, 17782784 blocks
0:3 Vendor: SEAGATE Model: ST39175LW Revision: 0001
Serial Number: 3AL0P3V700001005HKUC
Disk Status: Standby, 17782784 blocks
0:4 Vendor: SEAGATE Model: ST39175LW Revision: 0001
Serial Number: 3AL0P3SW000070113RRF
Disk Status: Online, 17782784 blocks
0:5 Vendor: SEAGATE Model: ST39175LW Revision: 0001
Serial Number: 3AL0P1MV00007012RDGX
Disk Status: Online, 17782784 blocks
Logical Drives:
/dev/rd/c0d0: RAID-5, Online, 71131136 blocks, Write Thru
No Rebuild or Consistency Check in Progress

[7.5.] Other information that might be relevant to the problem
(please look in /proc and include all information that you
think to be relevant):

None.S

[X.] Other notes, patches, fixes, workarounds:

None. Please email me directly if you need any additional
information on this problem.


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