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Fri, 24 Apr 2020 13:41:04 +0200 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 6A0DE100038; Fri, 24 Apr 2020 13:41:04 +0200 (CEST) Received: from Webmail-eu.st.com (sfhdag3node3.st.com [10.75.127.9]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 576082B3DA2; Fri, 24 Apr 2020 13:41:04 +0200 (CEST) Received: from localhost (10.75.127.49) by SFHDAG3NODE3.st.com (10.75.127.9) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Fri, 24 Apr 2020 13:41:03 +0200 From: Benjamin Gaignard To: , , , , , , , Subject: [RFC 2/3] cpufreq: governor: Use minimum load QoS Date: Fri, 24 Apr 2020 13:40:57 +0200 Message-ID: <20200424114058.21199-3-benjamin.gaignard@st.com> X-Mailer: git-send-email 2.15.0 In-Reply-To: <20200424114058.21199-1-benjamin.gaignard@st.com> References: <20200424114058.21199-1-benjamin.gaignard@st.com> MIME-Version: 1.0 X-Originating-IP: [10.75.127.49] X-ClientProxiedBy: SFHDAG5NODE2.st.com (10.75.127.14) To SFHDAG3NODE3.st.com (10.75.127.9) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138, 18.0.676 definitions=2020-04-24_04:2020-04-23, 2020-04-24 signatures=0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200424_044115_718044_2F06A392 X-CRM114-Status: GOOD ( 11.88 ) X-Spam-Score: -0.9 (/) X-Spam-Report: SpamAssassin version 3.4.4 on bombadil.infradead.org summary: Content analysis details: (-0.9 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at https://www.dnswl.org/, low trust [91.207.212.93 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Benjamin Gaignard , linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Make sure that the returned load is above the system-wide minimum load QoS. Devices could set this specific QoS to inform governors about their need in terms of CPU load when computing it from idle time isn't accurate. Signed-off-by: Benjamin Gaignard --- drivers/cpufreq/cpufreq_governor.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/cpufreq/cpufreq_governor.c b/drivers/cpufreq/cpufreq_governor.c index f99ae45efaea..1494e5e4c788 100644 --- a/drivers/cpufreq/cpufreq_governor.c +++ b/drivers/cpufreq/cpufreq_governor.c @@ -118,6 +118,7 @@ unsigned int dbs_update(struct cpufreq_policy *policy) unsigned int ignore_nice = dbs_data->ignore_nice_load; unsigned int max_load = 0, idle_periods = UINT_MAX; unsigned int sampling_rate, io_busy, j; + unsigned int qos_min_load; /* * Sometimes governors may use an additional multiplier to increase @@ -225,6 +226,10 @@ unsigned int dbs_update(struct cpufreq_policy *policy) policy_dbs->idle_periods = idle_periods; + qos_min_load = cpufreq_minload_qos_limit(); + if (qos_min_load > max_load) + max_load = qos_min_load; + return max_load; } EXPORT_SYMBOL_GPL(dbs_update);