Subject: Re: [RFC PATCH 00/15] Nohz task support
From: Steven Rostedt <rostedt@goodmis.org>
To: Frederic Weisbecker <fweisbec@gmail.com>
Cc: LKML <linux-kernel@vger.kernel.org>, Thomas Gleixner <tglx@linutronix.de>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>,
        "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>,
        Lai Jiangshan <laijs@cn.fujitsu.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Anton Blanchard <anton@au1.ibm.com>,
        Tim Pepper <lnxninja@linux.vnet.ibm.com>
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Date: Mon, 20 Dec 2010 20:36:39 -0500
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On Tue, 2010-12-21 at 00:33 +0100, Frederic Weisbecker wrote:
>  
> > I wounder if we could just have this happen automatically.
> 
> But this would add some global overhead, especially in the syscall
> path as we need to take the slow path to hook userspace resume/exit.
>  

I guess we could measure the overhead. See if the timer causes more
overhead than the added overhead of the syscall, or not.

-- Steve


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