From patchwork Thu Dec 23 06:23:40 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Youquan Song X-Patchwork-Id: 429111 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.3) with ESMTP id oBNJ5f3Z026223 for ; Thu, 23 Dec 2010 19:05:51 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752044Ab0LWGVS (ORCPT ); Thu, 23 Dec 2010 01:21:18 -0500 Received: from mga02.intel.com ([134.134.136.20]:28796 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751931Ab0LWGVR (ORCPT ); Thu, 23 Dec 2010 01:21:17 -0500 Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga101.jf.intel.com with ESMTP; 22 Dec 2010 22:21:07 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.60,217,1291622400"; d="scan'208";a="690075293" Received: from linux-otc0903.bj.intel.com (HELO localhost.localdomain) ([10.238.154.141]) by orsmga001.jf.intel.com with ESMTP; 22 Dec 2010 22:21:04 -0800 From: Youquan Song To: davej@redhat.com, cpufreq@vger.kernel.org Cc: venki@google.com, arjan@linux.intel.com, lenb@kernel.org, suresh.b.siddha@intel.com, kent.liu@intel.com, chaohong.guo@intel.com, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, Youquan Song , Youquan Song Subject: [PATCH 2/6] cpufreq: Add sampling_window tunable Date: Thu, 23 Dec 2010 14:23:40 +0800 Message-Id: <1293085424-18212-3-git-send-email-youquan.song@intel.com> X-Mailer: git-send-email 1.6.4.2 In-Reply-To: <1293085424-18212-2-git-send-email-youquan.song@intel.com> References: <1293085424-18212-1-git-send-email-youquan.song@intel.com> <1293085424-18212-2-git-send-email-youquan.song@intel.com> Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter1.kernel.org [140.211.167.41]); Thu, 23 Dec 2010 19:05:51 +0000 (UTC) diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c index e49b2e1..87aec7f 100644 --- a/drivers/cpufreq/cpufreq_ondemand.c +++ b/drivers/cpufreq/cpufreq_ondemand.c @@ -295,6 +295,7 @@ show_one(up_threshold, up_threshold); show_one(sampling_down_factor, sampling_down_factor); show_one(ignore_nice_load, ignore_nice); show_one(powersave_bias, powersave_bias); +show_one(sampling_window, sampling_window); /*** delete after deprecation time ***/ @@ -455,12 +456,36 @@ static ssize_t store_powersave_bias(struct kobject *a, struct attribute *b, return count; } +static ssize_t store_sampling_window(struct kobject *a, struct attribute *b, + const char *buf, size_t count) +{ + unsigned int input; + int ret; + ret = sscanf(buf, "%u", &input); + + if (ret != 1) + return -EINVAL; + + if (input > 1000000) + input = 1000000; + + if (input < 10000) + input = 10000; + + mutex_lock(&dbs_mutex); + dbs_tuners_ins.sampling_window = input; + mutex_unlock(&dbs_mutex); + + return count; +} + define_one_global_rw(sampling_rate); define_one_global_rw(io_is_busy); define_one_global_rw(up_threshold); define_one_global_rw(sampling_down_factor); define_one_global_rw(ignore_nice_load); define_one_global_rw(powersave_bias); +define_one_global_rw(sampling_window); static struct attribute *dbs_attributes[] = { &sampling_rate_max.attr, @@ -471,6 +496,7 @@ static struct attribute *dbs_attributes[] = { &ignore_nice_load.attr, &powersave_bias.attr, &io_is_busy.attr, + &sampling_window.attr, NULL };