linux-kernel - Re: [ANNOUNCE] 3.8-rc6-nohz4

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Message-ID: <20130207195539.GD25223@gmail.com>
Date:	Thu, 7 Feb 2013 20:55:39 +0100
From:	Ingo Molnar <mingo@...nel.org>
To:	Christoph Lameter <cl@...ux.com>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Alessio Igor Bogani <abogani@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Chris Metcalf <cmetcalf@...era.com>,
	Geoff Levand <geoff@...radead.org>,
	Gilad Ben Yossef <gilad@...yossef.com>,
	Hakan Akkan <hakanakkan@...il.com>,
	Li Zhong <zhong@...ux.vnet.ibm.com>,
	Namhyung Kim <namhyung.kim@....com>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Paul Gortmaker <paul.gortmaker@...driver.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [ANNOUNCE] 3.8-rc6-nohz4


* Christoph Lameter <cl@...ux.com> wrote:

> On Thu, 7 Feb 2013, Frederic Weisbecker wrote:
> 
> > Not with hrtick.
> 
> hrtick? Did we not already try that a couple of years back and 
> it turned out that the overhead of constantly reprogramming a 
> timer via the PCI bus was causing too much of a performance 
> regression?

No, it was simply buggy.

Thanks,

	Ingo
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