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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 299BCC32792 for ; Thu, 3 Oct 2019 17:19:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E46B52086A for ; Thu, 3 Oct 2019 17:19:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570123195; bh=/ok+yJILJ8USFatLtQTy93jwL1cEUtOxh6rBIm5eFvQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Upe/WPOsEhBWHzqub+Za78KK/PVMCiN4iezmUMXp9hRRi++qHmWoaxlige+smzGq8 mcao8fa/cEXylzI8u8VSkEOjKh4UwS0rMlTC5PrcAj7XMzn4lexz9QNYII+p8beqt7 UudFhfzSeZAkPFERRVTmgKC26IabyLly2TMTKmlo= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388247AbfJCQTS (ORCPT ); Thu, 3 Oct 2019 12:19:18 -0400 Received: from mail.kernel.org ([198.145.29.99]:46216 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389487AbfJCQTQ (ORCPT ); Thu, 3 Oct 2019 12:19:16 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 7A21B20865; Thu, 3 Oct 2019 16:19:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570119556; bh=/ok+yJILJ8USFatLtQTy93jwL1cEUtOxh6rBIm5eFvQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Jncjc/sLOJ5v6uUz14GWHWURr8+FInnI9Q+tcz1JWBgpv4dmJKXUqrbih7UTuysmK mmuVmBhhk9o9DXbfS+037txFO4/XBFGz55+/jM6jdBJHTOqJID+juS04amkqpS6XTV yJgadwC7q/eSxN6FkOOD7SxW4p3cOA4EXjnFkfZI= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Douglas RAILLARD , "Peter Zijlstra (Intel)" , "Rafael J. Wysocki" , Sasha Levin Subject: [PATCH 4.19 107/211] sched/cpufreq: Align trace event behavior of fast switching Date: Thu, 3 Oct 2019 17:52:53 +0200 Message-Id: <20191003154511.856176954@linuxfoundation.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191003154447.010950442@linuxfoundation.org> References: <20191003154447.010950442@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 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