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 07685C3A5A6 for ; Sun, 22 Sep 2019 18:56:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CB52E21907 for ; Sun, 22 Sep 2019 18:56:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569178576; bh=/ok+yJILJ8USFatLtQTy93jwL1cEUtOxh6rBIm5eFvQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ybfmRdA4Idj+/eP5ttv7LriEL+tLhxrvjpgPYz3CjFqe9Eg0PJnKrAtewTwhTUx1J gYsKB+VvROnsfiRG9SDzh4QnO9/g+/m4aOMCAnaNALd2Gil6UMpIl/mKOgi/GhwnJ6 GU+/QIWn68Yjzd/dm+AtJoDzpFt0ZAtfvsZHeALY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2438541AbfIVS4Q (ORCPT ); Sun, 22 Sep 2019 14:56:16 -0400 Received: from mail.kernel.org ([198.145.29.99]:58154 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2438532AbfIVS4O (ORCPT ); Sun, 22 Sep 2019 14:56:14 -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 21C00206C2; Sun, 22 Sep 2019 18:56:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569178573; bh=/ok+yJILJ8USFatLtQTy93jwL1cEUtOxh6rBIm5eFvQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=psV78whlQ3R7oq5G+yTXm3R61eCnEDPGCkakIn6Lx6UuBgAF2kdeGuvCbysFsHAWy w72Fgdj0tsRpw6PyzwslREh/A7+y6OSrvbtBL0xiF3/FaU5BFlJJo5z2cKDXK9Oi2d QzwBKFuLNvnzPCAe9G2sAEFW/1W7+Cf6v6LMp8fg= 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 4.19 085/128] sched/cpufreq: Align trace event behavior of fast switching Date: Sun, 22 Sep 2019 14:53:35 -0400 Message-Id: <20190922185418.2158-85-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190922185418.2158-1-sashal@kernel.org> References: <20190922185418.2158-1-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 64d54acc99282..54fcff656ecd7 100644 --- a/kernel/sched/cpufreq_schedutil.c +++ b/kernel/sched/cpufreq_schedutil.c @@ -118,6 +118,7 @@ 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; @@ -127,7 +128,11 @@ 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