linux-kernel - Re: [patch-3.18.7-rt1] sched/context-tracking: fix PREEMPT

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Message-ID: <20150309134535.GA13768@linutronix.de>
Date:	Mon, 9 Mar 2015 14:45:35 +0100
From:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:	Mike Galbraith <umgwanakikbuti@...il.com>
Cc:	linux-rt-users <linux-rt-users@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>, rostedt@...dmis.org,
	John Kacur <jkacur@...hat.com>
Subject: Re: [patch-3.18.7-rt1] sched/context-tracking: fix PREEMPT_LAZY
 explosions

* Mike Galbraith | 2015-02-18 12:21:54 [+0100]:

>On Mon, 2015-02-16 at 12:18 +0100, Sebastian Andrzej Siewior wrote:
>
>> Known issues:
>>
>>       - lazy preempt on x86_64 leads to a crash with some load.
>
>The below still works for me.  (it doesn't make nohz_full actually work
>in rt, but at least folks who want to tinker with it can do so)
So your box still crashes without it?

The thing is I tried to reproduce it and it does not occur anymore.
Neither in KVM nor on real HW.

Sebastian
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