Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752210Ab0LWGOw (ORCPT ); Thu, 23 Dec 2010 01:14:52 -0500 Received: from mga09.intel.com ([134.134.136.24]:54294 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752091Ab0LWGOt (ORCPT ); Thu, 23 Dec 2010 01:14:49 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.60,218,1291622400"; d="scan'208";a="690073872" From: Youquan Song To: davej@redhat.com, cpufreq@vger.kernle.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 5/6] cpufreq: Add down_differential tunable Date: Thu, 23 Dec 2010 14:17:05 +0800 Message-Id: <1293085026-18173-6-git-send-email-youquan.song@intel.com> X-Mailer: git-send-email 1.6.4.2 In-Reply-To: <1293085026-18173-5-git-send-email-youquan.song@intel.com> References: <1293085026-18173-1-git-send-email-youquan.song@intel.com> <1293085026-18173-2-git-send-email-youquan.song@intel.com> <1293085026-18173-3-git-send-email-youquan.song@intel.com> <1293085026-18173-4-git-send-email-youquan.song@intel.com> <1293085026-18173-5-git-send-email-youquan.song@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2288 Lines: 71 Add down_differential tuable for user adjust ondemand governor decrease frequency threshold. down_differential is used in original ondemand governor code, but it does not add it as tunable, so I add it as tunable in this patch Signed-off-by: Youquan Song --- drivers/cpufreq/cpufreq_ondemand.c | 26 ++++++++++++++++++++++++++ 1 files changed, 26 insertions(+), 0 deletions(-) diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c index 5dd3770..85ca136 100644 --- a/drivers/cpufreq/cpufreq_ondemand.c +++ b/drivers/cpufreq/cpufreq_ondemand.c @@ -292,6 +292,7 @@ static ssize_t show_##file_name \ show_one(sampling_rate, sampling_rate); show_one(io_is_busy, io_is_busy); show_one(up_threshold, up_threshold); +show_one(down_differential, down_differential); show_one(sampling_down_factor, sampling_down_factor); show_one(ignore_nice_load, ignore_nice); show_one(powersave_bias, powersave_bias); @@ -513,9 +514,33 @@ static ssize_t store_window_is_dynamic(struct kobject *a, struct attribute *b, return count; } +static ssize_t store_down_differential(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 > 30) + input = 30; + + if (input < 0) + input = 0; + + mutex_lock(&dbs_mutex); + dbs_tuners_ins.down_differential = 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(down_differential); define_one_global_rw(sampling_down_factor); define_one_global_rw(ignore_nice_load); define_one_global_rw(powersave_bias); @@ -527,6 +552,7 @@ static struct attribute *dbs_attributes[] = { &sampling_rate_min.attr, &sampling_rate.attr, &up_threshold.attr, + &down_differential.attr, &sampling_down_factor.attr, &ignore_nice_load.attr, &powersave_bias.attr, -- 1.6.4.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/