Re: 3.12.9-rt13: BUG: soft lockup

[Fernando Lopez-Lezcano]

On 02/13/2014 03:55 PM, Thomas Gleixner wrote:
> On Thu, 13 Feb 2014, Fernando Lopez-Lezcano wrote:
>
> > On 02/13/2014 02:25 PM, Thomas Gleixner wrote:
> > > On Wed, 12 Feb 2014, Fernando Lopez-Lezcano wrote:
> > > > [771508.546449] RIP: 0010:[<ffffffff810dc60a>]  [<ffffffff810dc60a>]
> > > > smp_call_function_many+0x2ca/0x330
> > >
> > > Can you decode the exact location inside of smp_call_function_many via
> > > addr2line please ?
> >
> > Hope this is useful (adding 0x2ce/0x330 as offsets does not make any
> > difference, don't know if it should)...
> >
> > # grep smp_call_function /var/log/messages|tail -1
> > Feb 12 14:18:21 cmn27 kernel: [771840.224419] RIP: 0010:[<ffffffff810dc60e>]
> > [<ffffffff810dc60e>] smp_call_function_many+0x2ce/0x330
> > # addr2line -e
> > /usr/lib/debug/lib/modules/3.12.10-300.rt15.1.fc20.ccrma.x86_64+rt/vmlinux
> > ffffffff810dc60e
> > /usr/src/debug/kernel-3.12.fc20.ccrma/linux-3.12.10-300.rt15.1.fc20.ccrma.x86_64/kernel/rtmutex.c:1295
>
> I can't see how the kernel decoder thinks it's smp_call_function_many
> but addr2line looks at rtmutex.c
>
> That doesn't make any sense at all. Version mismatch?

Indeed, sorry for the mixup... here I go again, hopefully this one will 
make sense:

# addr2line -e 
/usr/lib/debug/lib/modules/3.12.9-301.rt13.1.fc20.ccrma.x86_64+rt/vmlinux ffffffff810dc60e
/usr/src/debug/kernel-3.12.fc20.ccrma/linux-3.12.9-301.rt13.1.fc20.ccrma.x86_64/kernel/smp.c:108

-- Fernando
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