From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932317AbdCILqJ (ORCPT ); Thu, 9 Mar 2017 06:46:09 -0500 Received: from mail-pg0-f53.google.com ([74.125.83.53]:34420 "EHLO mail-pg0-f53.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932258AbdCILqF (ORCPT ); Thu, 9 Mar 2017 06:46:05 -0500 From: Viresh Kumar To: Rafael Wysocki , Ingo Molnar , Peter Zijlstra , Srinivas Pandruvada , Len Brown , Viresh Kumar Cc: linaro-kernel@lists.linaro.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, Vincent Guittot , smuckle.linux@gmail.com, juri.lelli@arm.com, Morten.Rasmussen@arm.com, patrick.bellasi@arm.com, eas-dev@lists.linaro.org Subject: [RFC 8/9] intel_pstate: ignore scheduler cpufreq callbacks on remote CPUs Date: Thu, 9 Mar 2017 17:15:18 +0530 Message-Id: X-Mailer: git-send-email 2.7.1.410.g6faf27b 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 3d37219a0dd7..bd60f1cd7ea6 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -1930,6 +1930,9 @@ 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 (pstate_funcs.get_target_pstate == get_target_pstate_use_cpu_load) { if (flags & SCHED_CPUFREQ_IOWAIT) { cpu->iowait_boost = int_tofp(1); -- 2.7.1.410.g6faf27b