linux-kernel - Re: [PREEMPT-RT] [PATCH] s390/cpum_sf: Remove superfluous SMP function call

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Message-ID: <20160405115129.GE30124@linutronix.de>
Date:	Tue, 5 Apr 2016 13:51:29 +0200
From:	rcochran@...utronix.de
To:	Heiko Carstens <heiko.carstens@...ibm.com>
Cc:	Sebastian Andrzej Siewior <sebastian.siewior@...utronix.de>,
	Anna-Maria Gleixner <anna-maria@...utronix.de>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	linux-s390@...r.kernel.org, linux-kernel@...r.kernel.org,
	rt@...utronix.de
Subject: Re: [PREEMPT-RT] [PATCH] s390/cpum_sf: Remove superfluous SMP
 function call

On Tue, Apr 05, 2016 at 01:36:38PM +0200, Heiko Carstens wrote:
> On Tue, Apr 05, 2016 at 01:23:36PM +0200, Heiko Carstens wrote:
> > Subsequently, in this case, the setup_pmc_cpu() call will be executed on
> > the wrong cpu.
> 
> .. or to illustrate this behaviour: the following patch (white space
> damaged due to copy-paste) results in the following:

I guess you are missing the following commit?


commit 1cf4f629d9d246519a1e76c021806f2a51ddba4d
Author: Thomas Gleixner <tglx@...utronix.de>
Date:   Fri Feb 26 18:43:39 2016 +0000

    cpu/hotplug: Move online calls to hotplugged cpu


Thanks,
Richard