I was writing a bug report (parport slow, resources
problems?),
when I tried something strange and OOPS.
The original report is included in the last part of this
email.
After writing the report, I disabled parport resources in BIOS
and I maked:
cate3:~# modprobe parport_pc
Unable to handle kernel paging request at virtual address
c3a5f640
printing eip:
.....
Segmentation fault
cate3:~#
OOPS via ksymoops:
ksymoops 2.3.7 on i686 2.4.2. Options used
-V (default)
-k /proc/ksyms (default)
-l /proc/modules (default)
-o /lib/modules/2.4.2/ (default)
-m /boot/System.map-2.4.2 (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 paging request at virtual address
c3a5f640
c0177907
*pde = 011e6063
Oops: 0002
CPU: 0
EIP: 0010:[<c0177907>]
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010286
eax: c3a5f640 ebx: 00000000 ecx: c2f41000 edx: 00000000
esi: c3a23640 edi: 00000000 ebp: c3a23700 esp: c127dec8
ds: 0018 es: 0018 ss: 0018
Process modprobe (pid: 486, stackpage=c127d000)
Stack: 00000000 fffffffd 00000000 c3a217a2 c3a23640 fffffffd
fffffffe c3a23660
c3a236a0 c3a236e0 c3a2185c fffffffd fffffffe 00000000
00000001 00000001
00004860 00000000 00000000 c3a21951 c3a23660 c3a236a0
c3a23700 c3a236e0
Call Trace: [<c3a217a2>] [<c3a23640>] [<c3a23660>]
[<c3a236a0>] [<c3a236e0>] [<c3a2185c>] [<c3a21951>]
[<c3a23660>] [<c3a236a0>] [<c3a23700>] [<c3a236e0>]
[<c3a1f000>] [<c012a264>] [<c011576d>] [<c3a17000>]
[<c3a1f060>] [<c0108d5f>]
Code: 89 30 8b 1d 48 8c 1f c0 31 ff 81 fb 48 8c 1f c0 74 2a 8d
b4
>>EIP; c0177907 <pci_register_driver+1b/60> <=====
Trace; c3a217a2 <[parport_pc]parport_pc_find_ports+26/3c>
Trace; c3a23640 <[parport_pc]parport_pc_pci_driver+0/20>
Trace; c3a23660 <[parport_pc]io+0/40>
Trace; c3a236a0 <[parport_pc]io_hi+0/40>
Trace; c3a236e0 <[parport_pc]dmaval+0/20>
Trace; c3a2185c <[parport_pc]parport_pc_init+a4/b8>
Trace; c3a21951 <[parport_pc]init_module+e1/f0>
Trace; c3a23660 <[parport_pc]io+0/40>
Trace; c3a236a0 <[parport_pc]io_hi+0/40>
Trace; c3a23700 <[parport_pc]irqval+0/20>
Trace; c3a236e0 <[parport_pc]dmaval+0/20>
Trace; c3a1f000 <[parport_pc]__module_kernel_version+0/20>
Trace; c012a264 <free_pages+24/28>
Trace; c011576d <sys_init_module+4f5/598>
Trace; c3a17000 <_end+37b6eb0/37b6f10>
Trace; c3a1f060 <[parport_pc]__module_description+0/0>
Trace; c0108d5f <system_call+33/38>
Code; c0177907 <pci_register_driver+1b/60>
00000000 <_EIP>:
Code; c0177907 <pci_register_driver+1b/60> <=====
0: 89 30 mov %esi,(%eax) <=====
Code; c0177909 <pci_register_driver+1d/60>
2: 8b 1d 48 8c 1f c0 mov 0xc01f8c48,%ebx
Code; c017790f <pci_register_driver+23/60>
8: 31 ff xor %edi,%edi
Code; c0177911 <pci_register_driver+25/60>
a: 81 fb 48 8c 1f c0 cmp $0xc01f8c48,%ebx
Code; c0177917 <pci_register_driver+2b/60>
10: 74 2a je 3c <_EIP+0x3c>
c0177943 <pci_register_driver
+57/60>
Code; c0177919 <pci_register_driver+2d/60>
12: 8d b4 00 00 00 00 00 lea 0x0(%eax,%eax,1),%esi
1 warning issued. Results may not be reliable.
cate3:~# lsmod
Module Size Used by
parport_pc 18528 1 (initializing)
parport 26464 0 [parport_pc]
cate3:~#
+++++++++++++++++++++++++++++++++++++++++++++++
Was: 2.4.x: Slow parport. Parport resources bug?
Hello!
In 2.4.x (and also in 2.3.x) the parport is slow!
Now [2.4.2] I noticed that parport don't use some resources!
also:
/etc/modules.conf:
...
options parport 0x378,5,3
...
cate3:~# lsmod
Module Size Used by
cate3:~# modprobe parport_pc
cate3:~# lsmod
Module Size Used by
parport_pc 18528 0
parport 26464 0 [parport_pc]
cate3:~#
In syslog:
Feb 22 21:02:25 cate3 kernel: 0x378: FIFO is 16 bytes
Feb 22 21:02:25 cate3 kernel: 0x378: writeIntrThreshold is 8
Feb 22 21:02:25 cate3 kernel: 0x378: readIntrThreshold is 8
Feb 22 21:02:25 cate3 kernel: 0x378: PWord is 8 bits
Feb 22 21:02:25 cate3 kernel: 0x378: Interrupts are ISA-Pulses
Feb 22 21:02:25 cate3 kernel: 0x378: ECP port cfgA=0x14
cfgB=0x7b
Feb 22 21:02:25 cate3 kernel: 0x378: ECP settings irq=5 dma=3
Feb 22 21:02:25 cate3 kernel: parport0: PC-style at 0x378
(0x778) [PCSPP,TRISTATE,COM
PAT,ECP]
Feb 22 21:02:25 cate3 kernel: parport0: irq 5 detected
Feb 22 21:02:25 cate3 kernel: parport0: Found 1 daisy-chained
devices
Feb 22 21:02:25 cate3 kernel: parport0: No more nibble data (1
bytes)
Feb 22 21:02:25 cate3 kernel: parport0: device reported
incorrect length field (61, s
hould be 62)
Feb 22 21:02:25 cate3 kernel: parport0 (addr 0): SCSI adapter,
IMG VP1
You see that parport0 claims irq5, and above seem that ir5 and
dma=3 is ok!
But no irq 5, nor dma used, but only the ioports:
cate3:~# cat /proc/interrupts
CPU0
0: 56688 XT-PIC timer
1: 2561 XT-PIC keyboard
2: 0 XT-PIC cascade
8: 1 XT-PIC rtc
12: 7759 XT-PIC PS/2 Mouse
14: 3167 XT-PIC ide0
15: 32 XT-PIC ide1
NMI: 0
ERR: 0
cate3:~# cat /proc/dma
4: cascade
cate3:~# cat /proc/ioports
0000-001f : dma1
0020-003f : pic1
0040-005f : timer
0060-006f : keyboard
0070-007f : rtc
0080-008f : dma page reg
00a0-00bf : pic2
00c0-00df : dma2
00f0-00ff : fpu
0170-0177 : ide1
01f0-01f7 : ide0
0376-0376 : ide1
0378-037a : parport0
03c0-03df : vga+
03c0-03df : matrox
03f6-03f6 : ide0
0778-077a : parport0
0cf8-0cff : PCI conf1
1000-101f : Intel Corporation 82371SB PIIX3 USB [Natoma/Triton
II]
1020-102f : Intel Corporation 82371SB PIIX3 IDE [Natoma/Triton
II]
1020-1027 : ide0
1028-102f : ide1
Kernel 2.4.2, on a Compaq Computer, PentiumPro 200, Debian
Sid.
imm (iomega zip 250) attached to the parport.
What is wrong?
giacomo
PS: please CC: to me [due ECN problems :-( ]
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