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DateSat, 19 Jul 2003 12:41:42 +0200
FromSteffen Klassert <>
SubjectRe: kernel BUG at kernel/timer.c:380!
I have exactly the same problem. Tested on several machines with 
different hardware and and configs.
The problem appears since 2.5.70. Last working version was 2.5.69.
Steffen

On Fri, Jul 18, 2003 at 10:25:25PM -0400 Christian Mautner wrote:
> I have a very reproducible problem with 2.6.0-test1. 
> The system is a fairly recent installation of Debian Sarge.
> > Linux version 2.6.0-test1 (chm@data) (gcc version 3.3.1 20030626 (Debian prerelease)) #1 Thu Jul 17 18:03:58 EDT 2003
> > The hardware is a VIA board. Can't tell what exactly it is, it's not
> mine. I have no manual.> > vendor_id       : CentaurHauls> cpu family      : 6> model           : 7> model name      : VIA Ezra> stepping        : 8> cpu MHz         : 665.148> > eth0, eth1, eth2: RealTek RTL8139 Fast Ethernet (8139too.c)
> > I am experimenting with the ethernet bridging code. I do:
> > % brctl addbr br0> % brctl stp br0 off> % brctl addif br0 eth1> % brctl addif br0 eth2> % > % ifconfig eth1 up> % ifconfig eth2 up> % ifconfig br0 up> > At which point the kernel tells me:> > --------------------------------------------------------------------------------
> > kernel BUG at kernel/timer.c:380!> invalid operand: 0000 [#1]> CPU:    0> EIP:    0060:[<c0126c6a>]    Not tainted> EFLAGS: 00010007> EIP is at cascade+0x3e/0x48> eax: cc171074   ebx: cc171074   ecx: 00048600   edx: cf757e98
> esi: c02fb850   edi: c02fb000   ebp: c035ff28   esp: c035ff1c
> ds: 007b   es: 007b   ss: 0068> Process swapper (pid: 0, threadinfo=c035e000 task=c02f8420)
> Stack: 00000000 c0396608 c035e000 c035ff58 c012736e c02fb000 c02fb820 00000006 
>        c02f9ec0 c035ff40 c035ff40 c035ff68 00000001 c0396608 fffffffd c035ff74 
>        c012283b c0396608 00000046 c035e000 c035e000 00000002 c035ff94 c010d6b1 
> Call Trace:
>  [<c012736e>] run_timer_softirq+0x316/0x3c8
>  [<c012283b>] do_softirq+0x9f/0xa4
>  [<c010d6b1>] do_IRQ+0x221/0x328
>  [<c0108a2c>] default_idle+0x0/0x30
>  [<c0105000>] _stext+0x0/0xd0
>  [<c010bbd4>] common_interrupt+0x18/0x20
>  [<c0108a2c>] default_idle+0x0/0x30
>  [<c0105000>] _stext+0x0/0xd0
>  [<c0108a52>] default_idle+0x26/0x30
>  [<c0108abd>] cpu_idle+0x29/0x3c
>  [<c03606b1>] start_kernel+0x1c5/0x224
> 
> Code: 0f 0b 7c 01 07 dd 2c c0 eb d7 0f bf 05 36 c0 2f c0 55 03 05 
>  <0>Kernel panic: Fatal exception in interrupt
> In interrupt handler - not syncing
> 
> --------------------------------------------------------------------------------
> 
> If I do the steps mentioned above in different order, e.g. ifconfig
> eth[12] up first, then it might not happen. But if I do it exactly as
> said, the bug happens reliably.
> 
> The .config is available at http://66.11.173.144/tmp/config-2.6.0-test1
> everything else on request.
> 
> chm.
> 
> -- 
> christian mautner -- chm bei istop punkt com -- ottawa, canada
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