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SubjectRe: 2.6.33.6-rt26: oops (network related?)
On Sat, 31 Jul 2010, Fernando Lopez-Lezcano wrote:

> On Thu, 2010-07-29 at 20:30 -0700, Fernando Lopez-Lezcano wrote:
> > Hi all...
> > This may not be rt related but here it goes anyway. It happened when I
> > tried to restart my iptables service (/sbin/service iptables start). I
> > think a day or two ago I had another network related hang, but it was a
> > complete hang (no clues left behind - power button to reset).
>
> Ok this one is rt related (apparently). The workstation (4 core, intel
> based) hang hard while a process was starting a daily backup but the
> logs captured the BUG:
>
> --------
> Jul 31 06:48:35 localhost kernel: ------------[ cut here ]------------
> Jul 31 06:48:35 localhost kernel: kernel BUG at kernel/rtmutex.c:808!

Weird, line 808 is a comment. The BUG_ON in rt_spin_lock_slowlock() is
at line 831.

> Jul 31 06:48:35 localhost kernel: [<c0792332>] ? rt_spin_lock+0x8/0xa
> Jul 31 06:48:35 localhost kernel: [<c075f896>] ? ipt_do_table+0xce/0x4f0

Yeah, that's the iptables locking problem, which is fixed in rt27.

Thanks,

tglx



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