From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932134AbWFRHdR (ORCPT ); Sun, 18 Jun 2006 03:33:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932123AbWFRHdQ (ORCPT ); Sun, 18 Jun 2006 03:33:16 -0400 Received: from mail06.syd.optusnet.com.au ([211.29.132.187]:49129 "EHLO mail06.syd.optusnet.com.au") by vger.kernel.org with ESMTP id S932149AbWFRHc4 (ORCPT ); Sun, 18 Jun 2006 03:32:56 -0400 From: Con Kolivas To: linux list Subject: [ckpatch][15/29] hz-no_default_250.patch Date: Sun, 18 Jun 2006 17:32:48 +1000 User-Agent: KMail/1.9.3 Cc: ck list MIME-Version: 1.0 Content-Disposition: inline X-Length: 2073 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <200606181732.48952.kernel@kolivas.org> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Make 250 HZ a value that is not selected by default and give some better recommendations in help. Signed-off-by: Con Kolivas kernel/Kconfig.hz | 15 +++++++++------ 1 files changed, 9 insertions(+), 6 deletions(-) Index: linux-ck-dev/kernel/Kconfig.hz =================================================================== --- linux-ck-dev.orig/kernel/Kconfig.hz 2006-06-18 15:23:58.000000000 +1000 +++ linux-ck-dev/kernel/Kconfig.hz 2006-06-18 15:24:28.000000000 +1000 @@ -21,14 +21,17 @@ choice help 100 HZ is a typical choice for servers, SMP and NUMA systems with lots of processors that may show reduced performance if - too many timer interrupts are occurring. + too many timer interrupts are occurring. Laptops may also show + improved battery life. - config HZ_250 + config HZ_250_NODEFAULT bool "250 HZ" help - 250 HZ is a good compromise choice allowing server performance - while also showing good interactive responsiveness even - on SMP and NUMA systems. + 250 HZ is a lousy compromise choice allowing server interactivity + while also showing desktop throughput and no extra power saving on + laptops. Good for when you can't make up your mind. + + Recommend 100 or 1000 instead. config HZ_1000 bool "1000 HZ" @@ -41,6 +44,6 @@ endchoice config HZ int default 100 if HZ_100 - default 250 if HZ_250 + default 250 if HZ_250_NODEFAULT default 1000 if HZ_1000 -- -ck