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Date:   Fri, 21 Jun 2019 21:08:53 +0200 (CEST)
From:   Thomas Gleixner <tglx@linutronix.de>
To:     kernel test robot <rong.a.chen@intel.com>
cc:     LKML <linux-kernel@vger.kernel.org>,
        Ingo Molnar <mingo@kernel.org>,
        "H. Peter Anvin" <hpa@zytor.com>, tipbuild@zytor.com, lkp@01.org
Subject: Re: [x86/hotplug] e1056a25da:
 WARNING:at_arch/x86/kernel/apic/apic.c:#setup_local_APIC
In-Reply-To: <20190620021856.GP7221@shao2-debian>
Message-ID: <alpine.DEB.2.21.1906212108150.5503@nanos.tec.linutronix.de>
References: <20190620021856.GP7221@shao2-debian>
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On Thu, 20 Jun 2019, kernel test robot wrote:

> FYI, we noticed the following commit (built with gcc-7):
> 
> commit: e1056a25daa6460c95e92d7d6853d05ad62458f7 ("x86/hotplug: Silence APIC and NMI when CPU is dead")
> https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git WIP.x86/ipi
> 
> in testcase: locktorture
> with following parameters:
> 
> 	runtime: 300s
> 	test: cpuhotplug
> 
> test-description: This torture test consists of creating a number of kernel threads which acquire the lock and hold it for specific amount of time, thus simulating different critical region behaviors.
> test-url: https://www.kernel.org/doc/Documentation/locking/locktorture.txt
> 
> 
> on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 2G

I cannot reproduce that issue. What's the underlying hardware machine?

Thanks,

	tglx