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Date: Sun, 27 Mar 2016 22:54:39 +0200
From: Peter Zijlstra <peterz@infradead.org>
To: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: paulmck@linux.vnet.ibm.com, Josh Triplett <josh@joshtriplett.org>,
        Ross Green <rgkernel@gmail.com>,
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        Oleg Nesterov <oleg@redhat.com>, pranith kumar <bobby.prani@gmail.com>,
        "Chatre, Reinette" <reinette.chatre@intel.com>
Subject: Re: rcu_preempt self-detected stall on CPU from 4.5-rc3, since 3.17
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On Mon, Mar 21, 2016 at 09:22:30AM -0700, Jacob Pan wrote:
> > > We're seeing a similar stall (~60 seconds) on an x86 development
> > > system here.  Any luck tracking down the cause of this?  If not, any
> > > suggestions for traces that might be helpful?

> +Reinette, she has the system that can reproduce the issue. I
> believe she is having some other problems with it at the moment. But
> the .config should be available. Version is v4.5.

Does that system have MONITOR/MWAIT errata?