From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BB691C3A5A6 for ; Sun, 22 Sep 2019 19:24:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 88D7121907 for ; Sun, 22 Sep 2019 19:24:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569180266; bh=kjUYmaBo4PVq9u9yyQ+YpRHxns2z/f+WYQMw69UXDSc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=giDVL4BmAMVHz+mKJMHkvAPYxuyVoZITjtSQcT0zrY2rELp7FBNSLiaxZmaCmSBwm 53Nu2LB8/8q6VXoLcOM0fHYYNntEyLRD82qIHZBwq207H01khsx4734shQV01G4DG2 7QvsET0fKiumH1hcUymb/kpBP9JBWjCeYeMj/OjQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727750AbfIVTYZ (ORCPT ); Sun, 22 Sep 2019 15:24:25 -0400 Received: from mail.kernel.org ([198.145.29.99]:52230 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388594AbfIVSwy (ORCPT ); Sun, 22 Sep 2019 14:52:54 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 86B662190F; Sun, 22 Sep 2019 18:52:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569178374; bh=kjUYmaBo4PVq9u9yyQ+YpRHxns2z/f+WYQMw69UXDSc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RTDKEaMdI+HPrkP4B6NmOzGM2uG7vNm5WylNbhjJcIVWkObwmLDG02k8WwsuvV/FM 6TlKcOZ9iLB8tNtV7wDoxK89kJmctvg4Ki6eAtU0Mfwwquj5sMODTzsMUSKjsZjCDG J38dauooYRWPrc0I2oRnbL8SEPvrdFKd0iQzmU7A= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Douglas RAILLARD , Peter Zijlstra , "Rafael J . Wysocki" , Sasha Levin Subject: [PATCH AUTOSEL 5.2 124/185] sched/cpufreq: Align trace event behavior of fast switching Date: Sun, 22 Sep 2019 14:48:22 -0400 Message-Id: <20190922184924.32534-124-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190922184924.32534-1-sashal@kernel.org> References: <20190922184924.32534-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Douglas RAILLARD [ Upstream commit 77c84dd1881d0f0176cb678d770bfbda26c54390 ] Fast switching path only emits an event for the CPU of interest, whereas the regular path emits an event for all the CPUs that had their frequency changed, i.e. all the CPUs sharing the same policy. With the current behavior, looking at cpu_frequency event for a given CPU that is using the fast switching path will not give the correct frequency signal. Signed-off-by: Douglas RAILLARD Acked-by: Peter Zijlstra (Intel) Signed-off-by: Rafael J. Wysocki Signed-off-by: Sasha Levin --- kernel/sched/cpufreq_schedutil.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/kernel/sched/cpufreq_schedutil.c b/kernel/sched/cpufreq_schedutil.c index ae3ec77bb92f6..e139b54716b4a 100644 --- a/kernel/sched/cpufreq_schedutil.c +++ b/kernel/sched/cpufreq_schedutil.c @@ -117,6 +117,7 @@ static void sugov_fast_switch(struct sugov_policy *sg_policy, u64 time, unsigned int next_freq) { struct cpufreq_policy *policy = sg_policy->policy; + int cpu; if (!sugov_update_next_freq(sg_policy, time, next_freq)) return; @@ -126,7 +127,11 @@ static void sugov_fast_switch(struct sugov_policy *sg_policy, u64 time, return; policy->cur = next_freq; - trace_cpu_frequency(next_freq, smp_processor_id()); + + if (trace_cpu_frequency_enabled()) { + for_each_cpu(cpu, policy->cpus) + trace_cpu_frequency(next_freq, cpu); + } } static void sugov_deferred_update(struct sugov_policy *sg_policy, u64 time, -- 2.20.1