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Date: Wed, 17 Feb 2016 17:37:47 +0100
From: Peter Zijlstra <peterz@infradead.org>
To: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>,
        Oleg Nesterov <oleg@redhat.com>,
        Intel graphics driver community testing & development 
	<intel-gfx@lists.freedesktop.org>,
        Linux kernel development <linux-kernel@vger.kernel.org>,
        Ingo Molnar <mingo@kernel.org>,
        David Hildenbrand <dahi@linux.vnet.ibm.com>,
        "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
        "Gautham R. Shenoy" <ego@linux.vnet.ibm.com>,
        Chris Wilson <chris@chris-wilson.co.uk>
Subject: Re: [Intel-gfx] [PATCH] [RFC] kernel/cpu: Use lockref for online CPU
 reference counting
Message-ID: <20160217163747.GJ6357@twins.programming.kicks-ass.net>
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On Wed, Feb 17, 2016 at 05:33:51PM +0100, Daniel Vetter wrote:
> On Wed, Feb 17, 2016 at 05:14:57PM +0100, Peter Zijlstra wrote:
> > On Wed, Feb 17, 2016 at 05:13:21PM +0100, Daniel Vetter wrote:
> > > And for context we're hitting this on CI in a bunch of our machines, which
> > 
> > What's CI ?
> 
> Continuous integration, aka our own farm of machines dedicated to running
> i915.ko testcases. Kinda like 0day (it does pre-merge testing on the m-l
> and also post-merge on our own little integration tree), but for just the
> graphics team and our needs.

So what patch triggered this new issue? Did cpufreq change or what?