From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752137AbdF2F2w (ORCPT ); Thu, 29 Jun 2017 01:28:52 -0400 Received: from mail-pf0-f175.google.com ([209.85.192.175]:36553 "EHLO mail-pf0-f175.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751922AbdF2F2D (ORCPT ); Thu, 29 Jun 2017 01:28:03 -0400 From: Viresh Kumar To: Rafael Wysocki , Ingo Molnar , Peter Zijlstra , Srinivas Pandruvada , Len Brown , Viresh Kumar Cc: linux-pm@vger.kernel.org, Vincent Guittot , linux-kernel@vger.kernel.org, smuckle.linux@gmail.com, juri.lelli@arm.com, Morten.Rasmussen@arm.com, patrick.bellasi@arm.com, eas-dev@lists.linaro.org Subject: [PATCH V2 3/4] intel_pstate: Ignore scheduler cpufreq callbacks on remote CPUs Date: Thu, 29 Jun 2017 10:56:32 +0530 Message-Id: X-Mailer: git-send-email 2.13.0.71.gd7076ec9c9cb In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Steve Muckle In preparation for the scheduler cpufreq callback happening on remote CPUs, check for this case in intel_pstate which currently requires the callback run on the local CPU. Such callbacks are ignored for now. Signed-off-by: Steve Muckle Signed-off-by: Viresh Kumar --- drivers/cpufreq/intel_pstate.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index 4ce501148790..7a2a8ee579ef 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -1755,6 +1755,9 @@ static void intel_pstate_update_util(struct update_util_data *data, u64 time, struct cpudata *cpu = container_of(data, struct cpudata, update_util); u64 delta_ns; + if (smp_processor_id() != data->cpu) + return; + if (flags & SCHED_CPUFREQ_IOWAIT) { cpu->iowait_boost = int_tofp(1); } else if (cpu->iowait_boost) { -- 2.13.0.71.gd7076ec9c9cb