Re: Machine stuck when userspace 100% busy

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On Mon, Oct 22, 2012 at 10:07 AM, Rolf Eike Beer <eike-kernel@xxxxxxxxx> wrote:
>> Get on the serial console and see if you can login?
>
>
> Was not possible, but because of something I broke on the other side of the
> serial line (i.e. no fault of the C3600).
>
>
>> Then issue a magic-sysrq+t? What's userspace doing?
>
>
> I went down to the machine and it was happily heartbeating as expected when
> the kernel still is able to send out ping replies. I pushed the power button
> and it shut down cleanly in something like half a minute. Poweron did work
> fine.
>
> I see in the logs one OOM event during the CMake tests. Afterwards I see for
> another 10 minutes some nagios events, so it took a while after the OOM for
> the machine to freak out, and things like creating new processes was no
> problem until then.
>
> I have no deeper insight in what happened later beyond what I already have
> written.

Without more information it's hard to determine what went wrong.

Cheers,
Carlos.
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