linux-kernel - Several OOPSes in net/sched/sch_generic.c, kernel/softirq.c (and other places)

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Date:	Sun, 31 Jan 2010 16:02:59 +0100
From:	Lee <lee-in-berlin@....de>
To:	linux-kernel@...r.kernel.org
Subject: Several OOPSes in net/sched/sch_generic.c, kernel/softirq.c (and
 other places)

Hello there,

I have witnessed several kernel oopses in a vanilla 2.6.32 kernel of different 
patch levels. The only observable effect of the kernel oops is that sometimes 
the throughput of the LAN NIC is extremly low (< 500kbit/s). I need some help 
as I have no idea why it is happening and where it's coming from (kernel bug? 
faulty h/w? config error?).

As I have no idea how I can trigger this oops -- it just happens after a few 
hours of running -- I'll list what I'm using the machine for: it's running 
Debian squeeze with a custom built kernel, vanilla 2.6.32.7 (.config 
attached). I use this machine as a router (two NICs), and use an USB ISDN 
device with asterisk. A WLAN AP is running over the USB wireless stick 
(rt73usb + hostapd 0.6.9), which is bridged with the LAN side of the one NIC. 
There is also a DVB-T card in there controlled by mythtv. I tried swapping the 
two PCI cards (r8169 and saa7134), guessing the problem may be IRQ related, 
but it didn't help.

I'm not experienced with the kernel programming, but I can patch and recompile 
my kernel if somebody gives me patches to test. Please tell me if other things 
are needed from me to isolate the problem.

Kind regards,
Lee

P.S. Keep me CC: as I'm off-list.

The oopses:
http://www.kerneloops.org/submitresult.php?number=1147708
http://www.kerneloops.org/submitresult.php?number=1149556
http://www.kerneloops.org/submitresult.php?number=1151131
http://www.kerneloops.org/submitresult.php?number=1154201
http://www.kerneloops.org/submitresult.php?number=1160155
http://www.kerneloops.org/submitresult.php?number=1128398
http://www.kerneloops.org/submitresult.php?number=1141755
http://www.kerneloops.org/submitresult.php?number=1145598
http://www.kerneloops.org/submitresult.php?number=1092906
http://www.kerneloops.org/submitresult.php?number=1095111

attached:
two last oopses (which didn't get reported by the program kerneloops)
kernel config
cat /proc/interrupts > proc_interrupts
lspci > lspci
lsusb > lsusb

View attachment "oops Jan 29 2010.txt" of type "text/plain" (3003 bytes)

View attachment "oops Jan 30 2010.txt" of type "text/plain" (3301 bytes)

View attachment "lspci" of type "text/plain" (1572 bytes)

View attachment "lsusb" of type "text/plain" (408 bytes)

View attachment "proc_interupts" of type "text/plain" (1045 bytes)

View attachment "config-2.6.32.7-motoko" of type "text/plain" (57789 bytes)