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SubjectRe: Linux 2.4.20-pre2-ac6
Hi Alan, Andre,

I have tried all 2.4.20-pre2-acX and found them stable until I tried to
burn a CD with -ac6...

the burner is an ide device, and after reading the changelog I decided to
give it a try:

I used cdrecord (via Xcdroast) and the burning never started due to the
fact that a kernel bug appeeared and the first cdrecord instance became a
zombie and the second got stuck in D state.

meanwhile (after the bug) the kernel was spitting out these messages
(around 4-5 a second):
<snip>
Aug 22 00:16:27 gandalf kernel: SCSI host 0 abort (pid 1784) timed out -
resetting
Aug 22 00:16:27 gandalf kernel: SCSI bus is being reset for host 0 channel 0.
Aug 22 00:16:27 gandalf kernel: scsi : aborting command due to timeout :
pid 1785, scsi0, channel 0, id 1, lun 0 0x1e 00 00 00 01 00
Aug 22 00:16:27 gandalf kernel: SCSI host 0 abort (pid 1785) timed out -
resetting
Aug 22 00:16:27 gandalf kernel: SCSI bus is being reset for host 0 channel 0.
Aug 22 00:16:27 gandalf kernel: scsi : aborting command due to timeout :
pid 1782, scsi0, channel 0, id 1, lun 0 0x2a 00 00 00 00 00 00 00 1f 00
Aug 22 00:16:27 gandalf kernel: SCSI host 0 abort (pid 1782) timed out -
resetting
Aug 22 00:16:27 gandalf kernel: SCSI bus is being reset for host 0 channel 0.
Aug 22 00:16:27 gandalf kernel: scsi : aborting command due to timeout :
pid 1783, scsi0, channel 0, id 1, lun 0 0x00 00 00 00 00 00
Aug 22 00:16:27 gandalf kernel: SCSI host 0 abort (pid 1783) timed out -
resetting
Aug 22 00:16:27 gandalf kernel: SCSI bus is being reset for host 0 channel 0.
Aug 22 00:16:27 gandalf kernel: scsi : aborting command due to timeout :
pid 1784, scsi0, channel 0, id 1, lun 0 0x1e 00 00 00 01 00
Aug 22 00:16:27 gandalf kernel: SCSI host 0 abort (pid 1784) timed out -
resetting
Aug 22 00:16:27 gandalf kernel: SCSI bus is being reset for host 0 channel 0.
Aug 22 00:16:27 gandalf kernel: scsi : aborting command due to timeout :
pid 1785, scsi0, channel 0, id 1, lun 0 0x1e 00 00 00 01 00
<snip>

well the pid's are strange, since the two cdrecord instances were pid 433
and 434...

the oops (through ksymoops):

rudmer:~ # ksymoops -L -m /boot/System.map-2.4.20-pre2-ac6 < oops
ksymoops 2.4.3 on i686 2.4.20-pre2-ac6. Options used
-V (default)
-k /proc/ksyms (default)
-L (specified)
-o /lib/modules/2.4.20-pre2-ac6/ (default)
-m /boot/System.map-2.4.20-pre2-ac6 (specified)

No modules in ksyms, skipping objects
Warning (compare_maps): ksyms_base symbol GPLONLY_idle_cpu not found in
System.map. Ignoring ksyms_base entry
Warning (compare_maps): ksyms_base symbol
GPLONLY_ip_conntrack_expect_find_get not found in System.map. Ignoring
ksyms_base entry
Warning (compare_maps): ksyms_base symbol GPLONLY_ip_conntrack_expect_put
not found in System.map. Ignoring ksyms_base entry
Warning (compare_maps): ksyms_base symbol GPLONLY_ip_conntrack_find_get not
found in System.map. Ignoring ksyms_base entry
Warning (compare_maps): ksyms_base symbol GPLONLY_ip_conntrack_put not
found in System.map. Ignoring ksyms_base entry
Aug 22 00:02:21 gandalf kernel: kernel BUG in header file at line 157
Aug 22 00:02:21 gandalf kernel: kernel BUG at panic.c:286!
Aug 22 00:02:21 gandalf kernel: invalid operand: 0000
Aug 22 00:02:21 gandalf kernel: CPU: 0
Aug 22 00:02:21 gandalf kernel:
EIP: 0010:[__out_of_line_bug+15/32] Not tainted
Aug 22 00:02:21 gandalf kernel: EFLAGS: 00010286
Aug 22 00:02:21 gandalf kernel: eax: 00000026 ebx: 00007800 ecx:
cdb9002c edx: c32b0000
Aug 22 00:02:21 gandalf kernel: esi: 00000002 edi: c1360000 ebp:
00000000 esp: c32b1b90
Aug 22 00:02:21 gandalf kernel: ds: 0018 es: 0018 ss: 0018
Aug 22 00:02:21 gandalf kernel: Process cdrecord (pid: 433, stackpage=c32b1000)
Aug 22 00:02:21 gandalf kernel: Stack: c0229e40 0000009d c01c7be1 0000009d
c1363000 c02db588 ceacb140 ceacf800
Aug 22 00:02:21 gandalf kernel: 00000014 c1360014 00000002 c1360000
c01c7ddb c02db4d8 ceacb140 c02db4d8
Aug 22 00:02:21 gandalf kernel: c02db588 ceacb140 ceacf800 00000000
00000000 c02db4d8 c01c8389 c02db588
Aug 22 00:02:21 gandalf kernel: Call Trace: [ide_build_sglist+321/384]
[ide_build_dmatable+91/416] [__ide_dma_write+41/288] [<d1b74963>] [<d1b74acb>]
Aug 22 00:02:21 gandalf kernel: [<d1b67ed1>] [<d1b67376>] [<d1b673ca>]
[<d1b61802>] [<d1b88f0b>] [<d1b89dd0>]
Aug 22 00:02:21 gandalf kernel: [<d1b88d1b>] [<d1b89158>]
[__alloc_pages+99/704] [reclaim_page+567/608] [__alloc_pages_limit+108/144]
[__alloc_pages+152/704]
Aug 22 00:02:21 gandalf kernel: Code: 0f 0b 1e 01 66 9e 22 c0 eb fe 8d b4
26 00 00 00 00 8a 54 24
Using defaults from ksymoops -t elf32-i386 -a i386

Trace; d1b67ed0 <END_OF_CODE+118870bc/????>
Trace; d1b67376 <END_OF_CODE+11886562/????>
Trace; d1b673ca <END_OF_CODE+118865b6/????>
Trace; d1b61802 <END_OF_CODE+118809ee/????>
Trace; d1b88f0a <END_OF_CODE+118a80f6/????>
Trace; d1b89dd0 <END_OF_CODE+118a8fbc/????>
Trace; d1b88d1a <END_OF_CODE+118a7f06/????>
Trace; d1b89158 <END_OF_CODE+118a8344/????>
Code; 00000000 Before first symbol
00000000 <_EIP>:
Code; 00000000 Before first symbol
0: 0f 0b ud2a
Code; 00000002 Before first symbol
2: 1e push %ds
Code; 00000002 Before first symbol
3: 01 66 9e add %esp,0xffffff9e(%esi)
Code; 00000006 Before first symbol
6: 22 c0 and %al,%al
Code; 00000008 Before first symbol
8: eb fe jmp 8 <_EIP+0x8> 00000008 Before
first symbol
Code; 0000000a Before first symbol
a: 8d b4 26 00 00 00 00 lea 0x0(%esi,1),%esi
Code; 00000010 Before first symbol
11: 8a 54 24 00 mov 0x0(%esp,1),%dl


5 warnings issued. Results may not be reliable.



messages after loading the scsi-ide and friends modules:
Aug 21 23:57:25 gandalf kernel: Vendor: IOMEGA Model: ZIP
100 Rev: 23.D
Aug 21 23:57:25 gandalf
kernel: Type: Direct-Access ANSI SCSI revision: 00
Aug 21 23:57:25 gandalf kernel: Vendor: HL-DT-ST Model: CD-RW
GCE-8240B Rev: 1.06
Aug 21 23:57:25 gandalf
kernel: Type: CD-ROM ANSI SCSI revision: 02
Aug 21 23:57:25 gandalf kernel: Attached scsi CD-ROM sr0 at scsi0, channel
0, id 1, lun 0
Aug 21 23:57:25 gandalf kernel: sr0: scsi3-mmc drive: 32x/40x writer cd/rw
xa/form2 cdda tray
Aug 21 23:57:35 gandalf kernel: Attached scsi CD-ROM sr0 at scsi0, channel
0, id 1, lun 0
Aug 21 23:57:35 gandalf kernel: sr0: scsi3-mmc drive: 32x/40x writer cd/rw
xa/form2 cdda tray

lspci:
00:00.0 Host bridge: Silicon Integrated Systems [SiS]: Unknown device 0735
(rev 01)
00:01.0 PCI bridge: Silicon Integrated Systems [SiS] 5591/5592 AGP
00:02.0 ISA bridge: Silicon Integrated Systems [SiS] 85C503/5513
00:02.5 IDE interface: Silicon Integrated Systems [SiS] 5513 [IDE] (rev d0)
00:0b.0 Ethernet controller: Winbond Electronics Corp W89C940
00:0f.0 Multimedia audio controller: Ensoniq 5880 AudioPCI (rev 02)
00:11.0 Ethernet controller: Winbond Electronics Corp W89C940
01:00.0 VGA compatible controller: Matrox Graphics, Inc. MGA G200 AGP (rev 01)


If you need more info, please ask

Rudmer

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