From mboxrd@z Thu Jan  1 00:00:00 1970
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Subject: Re: [PATCH] cpu/hotplug: fix rollback during error-out in
 __cpu_disable()
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From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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Date: Thu, 7 Apr 2016 17:14:00 +0200
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To: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>, linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, rt@linutronix.de, Martin Schwidefsky <schwidefsky@de.ibm.com>, Anna-Maria Gleixner <anna-maria@linutronix.de>
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On 04/06/2016 09:51 PM, Heiko Carstens wrote:
> This fixes the issue that a second cpu_down() will take forever, if
> __cpu_disable() fails.

Yes. But even without the second take down your CPU isn't complete up.

> However it does not fix the issue that CPU_DOWN_FAILED will be seen on a
> different cpu than the cpu that was supposed to be taken offline.

This is correct. It fixes only the regression you reported.
The CPU_DOWN_FAILED patches are on hold for now.

Sebastian