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Date: Tue, 21 Dec 2010 03:15:26 +0100 From: Frederic Weisbecker <fweisbec@...il.com> To: Steven Rostedt <rostedt@...dmis.org> Cc: LKML <linux-kernel@...r.kernel.org>, Thomas Gleixner <tglx@...utronix.de>, Peter Zijlstra <a.p.zijlstra@...llo.nl>, "Paul E . McKenney" <paulmck@...ux.vnet.ibm.com>, Lai Jiangshan <laijs@...fujitsu.com>, Andrew Morton <akpm@...ux-foundation.org>, Anton Blanchard <anton@....ibm.com>, Tim Pepper <lnxninja@...ux.vnet.ibm.com> Subject: Re: [RFC PATCH 00/15] Nohz task support On Mon, Dec 20, 2010 at 08:36:39PM -0500, Steven Rostedt wrote: > 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. Indeed, but may be let's stage that first as a conditional attribute and if it proves better results most of the time, then let's make it the default. Hm? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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