Date: Mon, 16 Nov 2015 23:01:12 +0100 (CET)
From: Thomas Gleixner <tglx@linutronix.de>
To: Jacob Pan <jacob.jun.pan@linux.intel.com>
cc: Peter Zijlstra <peterz@infradead.org>, Ingo Molnar <mingo@redhat.com>,
        John Stultz <john.stultz@linaro.org>,
        LKML <linux-kernel@vger.kernel.org>,
        Arjan van de Ven <arjan@linux.intel.com>,
        Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>,
        Len Brown <len.brown@intel.com>,
        Rafael Wysocki <rafael.j.wysocki@intel.com>,
        Eduardo Valentin <edubezval@gmail.com>, Paul Turner <pjt@google.com>,
        Josh Triplett <josh@joshtriplett.org>,
        "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Subject: Re: [PATCH 2/4] timer: relax tick stop in idle entry
In-Reply-To: <20151116135126.5a50e45d@icelake>
Message-ID: <alpine.DEB.2.11.1511162255430.3761@nanos>
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 <20151116135126.5a50e45d@icelake>
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On Mon, 16 Nov 2015, Jacob Pan wrote:

> For the second case, which is much more rare, I think we do have next
> timer exactly one tick away. Just don't know why tick will continue into
> idle loop.

Well, it should not be hard to figure that out. There are not so many
checks involved when tick_nohz_irq_exit() is called.

Thanks,

	tglx
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