Re: Sparc64 kernel rcu_sched stalls

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From: Pierre Muller <pierre@xxxxxxxxxxxxxx>
Date: Wed, 2 Aug 2017 11:04:20 +0200

> 
> 
> Le 27/07/2017 à 01:41, David Miller a écrit :
>> From: John Paul Adrian Glaubitz <glaubitz@xxxxxxxxxxxxxxxxxxx>
>> Date: Fri, 21 Jul 2017 16:28:01 +0200
>> 
>>> When running the attached, statically linked binary on a recent
>>> kernel, the kernel locks up with:
>> 
>> Thanks a lot, as soon as I sort through the RCU stall bug I'll take
>> a close look at this!
>> 
> 
> 
> Hi David,
> 
>   is this responsible for the fact that sometimes
> my bash sleep commands do not return after the argument given time is elapsed?
> 
>   Is there a way to 'shake' the system?
> 
>   I do have a lot of
> INFO: rcu_sched detected stalls on CPUs/tasks
> messages in dmesg output, but I do not see
> directly any user program that is causing the problem
> in the output.
> 
> There are however a lot of segfault reports that are generated
> by the Free Pascal sparc64 testuite runs, on Debian stadler machine.
> 
> Are the two related?

I have no idea if these two things are related.
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