[PlanetCCRMA] CCRMA - Kernel Bug ?

[Fernando Lopez-Lezcano]

On Fri, 2010-03-19 at 15:01 +0000, Spencer Goh wrote:
> I noticed this in my dmesg output...  are you aware of this problem?
> Is there something wrong with the CCRMA kernel?
> Should I be worried?  Appears to be related to my network card driver
> [igb] and the Intel Direct Cache Access [dca] module.
> 
> I have installed the same kernel to several machines and am seeing the
> same problem.
> Anyone else seen anything similar?

I have seen similar BUG reports. I don't remember if exactly the same
one. If the machine works fine otherwise you could ignore them (it is
what I have done in the past). I'll see if I can post it to the linux
kernel mailing list...

-- Fernando



> Thanks
> Spencer
> 
> BUG: sleeping function called from invalid context at
> kernel/rtmutex.c:684
> in_atomic(): 1, irqs_disabled(): 0, pid: 7, name: sirq-net-rx/0
> Pid: 7, comm: sirq-net-rx/0 Tainted: G   M
> 2.6.31.12-1.rt21.1.fc12.ccrma.x86_64.rt #1
> Call Trace:
>  [<ffffffff81042002>] __might_sleep+0xe6/0xe8
>  [<ffffffff81083ade>] rt_spin_lock_fastlock.clone.1+0x34/0x79
>  [<ffffffff814514bd>] rt_spin_lock+0xe/0x10
>  [<ffffffffa002b1ac>] dca_common_get_tag+0x3c/0x86 [dca]
>  [<ffffffffa002b21f>] dca3_get_tag+0x15/0x17 [dca]
>  [<ffffffffa00498d1>] igb_update_dca+0xb1/0x270 [igb]
>  [<ffffffffa004d757>] igb_poll+0xb07/0xf20 [igb]
>  [<ffffffff81010797>] ? __switch_to+0x18b/0x217
>  [<ffffffff8144ffdc>] ? thread_return+0x53/0xc8
>  [<ffffffff813ad3d7>] net_rx_action+0xb0/0x20e
>  [<ffffffff8105ba28>] ksoftirqd+0x192/0x2ba
>  [<ffffffff8105b896>] ? ksoftirqd+0x0/0x2ba
>  [<ffffffff810720ff>] kthread+0x91/0x99
>  [<ffffffff81012f1a>] child_rip+0xa/0x20
>  [<ffffffff8107206e>] ? kthread+0x0/0x99
>  [<ffffffff81012f10>] ? child_rip+0x0/0x20
> 
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