linux-kernel - Re: [tip: sched/core] sched/core: Initialize the idle task with preemption disabled

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Date:   Wed, 07 Jul 2021 15:57:17 +0100
From:   Valentin Schneider <valentin.schneider@....com>
To:     Alexey Kardashevskiy <aik@...abs.ru>,
        Guenter Roeck <linux@...ck-us.net>,
        Frederic Weisbecker <frederic@...nel.org>
Cc:     linux-kernel@...r.kernel.org, linux-tip-commits@...r.kernel.org,
        Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>, x86@...nel.org
Subject: Re: [tip: sched/core] sched/core: Initialize the idle task with preemption disabled

On 08/07/21 00:35, Alexey Kardashevskiy wrote:
> On 08/07/2021 00:14, Guenter Roeck wrote:
>>
>> Can you reproduce the problem with a powerpc qemu emulation ?
>> If so, how do you reproduce it there ? Reason for asking is that I don't
>> see
>> the problem with any of my powerpc emulations, and I would like to add test
>> case(s) if possible.
>
> I can reproduce the problem on powerpc easily - qemu with "-smp 2" does it.
>

So on powerpc I'm chasing a slightly different problem, reported at
[1]. I couldn't get it to trigger on qemu for powerpc64, and I'm still
struggling with powerpc. Could you please share you qemu invocation &
kernel .config? Thanks.

[1]: https://lore.kernel.org/linux-next/YNSq3UQTjm6HWELA@in.ibm.com/

>
> --
> Alexey