linux-kernel - PROBLEM: 2.6.20-1 not working on ibook g4 (BUG/Oops)

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Date:	Mon, 5 Mar 2007 14:13:41 +0100
From:	francesco foresti <frafore@...cali.it>
To:	linux-kernel@...r.kernel.org
Subject: PROBLEM: 2.6.20-1 not working on ibook g4 (BUG/Oops)

Hi,
i'm having problems trying to use 2.6.20-1 (taken from kernel.org, not 
patched) on my ibook g4 (debian testing/unstable): 
i'm getting two errors while trying to boot up, and i can only report the 
second one because the other slips offscreen before i can see what's going 
on. However, this is what i have been able to hand-copy:
 
kernel BUG at mm/slab.c:610!
Oops: Exception in kernel mode, sig: 5 [#2]

Modules linked in: snd_aoa_codec_tas snd_aoa_fabric_layout snd_aoa 
snd_aoa_i2sbus snd_pcm_oss snd_mixer_oss snd_pcm appletouch
snd_timer snd_page_alloc snd soundcore snd_aoa_soundbus uninorth_agp agpgart 
eth1394 evdev ext3 jbd mbcache dm_mirror dm_snapshot
dm_mod usbhid ff_memless ide_cd cdrom ide_disk sungem sungem_phy ohci1394 
ieee1394 ehci_hcd ohci_hcd usbcore i2c_powermac
NIP: C007B5A4 LR: C007B740 CTR: 00000000
REGS: effc7e50 TRAP: 0700  Not tainted  (2.6.20.1-powerpc)
MSR: 00021032 <ME,IR,DR>  CR: 42000048 XER: 00000000
TASK effc0bf0[3] 'events/0' THREAD: effc6000
GPR00: 00000001 EFFC7F00 EFFC0BF0 EFFEE6E0 C0B1E008 00000000 00000000 00000000
GPR08: C1D093Bc 00004000 FFFFFFF4 C031E000 00000000 00000000 00000000 00000000
GPR16: 00000000 00000000 00000000 00000000 00000000 00000000 0164B230 41400000
GPR24: 00000000 00311000 EFFF6920 00000018 00000000 00000000 C1C96A10 EFFEE6E0
NIP [C007b5a4] free_block+0x5c/0x160
LR [C007B740] drain_array+0x98/0xd8
Call Trace:
[EFFC7F00] [00000001] 0x1 (unreliable)
[EFFC7F20] [C007B740] drain_array+0x98/0xd8
[EFFC7F40] [C007CE0C] cache_reap+0x40/0x128
[EFFC7F50] [C003E2C8] run_workqueue+0xb4/0x15c
[EFFC7F70] [C003EB10] worker_thread+0x124/0x15c
[EFFC7FC0] [C00423FC] kthread+0xc4/0x100
[EFFC7FF0] [C0013998] kernel_thread+0x44/0x60
Instruction dump:
3d20c02e 81692688 3d254000 5529c9f4 7c09582e 7c895a14 70094000 41a20008
8084000c 80040000 5400cffe <0f000000> 80e4001c 5789103a 3c000010

Here are some (hopefully) useful infos about the problem:
- some output from ver_linux:
Gnu C                     4.1.2
Gnu make              3.81
binutils                   2.17
util-linux                 2.12r
mount                    2.12r
module-init-tools   3.3-pre2
e2fsprogs              1.40-WIP
pcmciautils            014
Linux C Library       2.3.6
Dynamic linker (ldd)   2.3.6
Procps                    3.2.7
Net-tools                1.60
Kbd                         1.12
Sh-utils                   5.97
udev                       105
wireless-tools         28
- the machine isn't completely unresponsive (if i unplug ethernet i can see
 a message "<6> eth0 : Link down").
- log files show no trace of the problem 
  (i've looked into syslog, kern.log, messages)
- 2.6.19-7 doesn't show this issue.
- last ordinary lines i can see before this happens are some  
  snd_aoa_ modules loading.
I'm attaching my .config hoping it'll be 
useful. If i can do something else to help just ask.
Please cc me if you answer.

Thank You for helping,

Best 
-- 
===================================================================
Francesco Foresti
Registered Linux User #332599
key fingerprint = 59D5 1E61 6631 5DEF DC88 C64C 7F53 2F45 99FB CD21

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