From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756316Ab3BFCrs (ORCPT ); Tue, 5 Feb 2013 21:47:48 -0500 Received: from mail-oa0-f50.google.com ([209.85.219.50]:50995 "EHLO mail-oa0-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753390Ab3BFCrq (ORCPT ); Tue, 5 Feb 2013 21:47:46 -0500 MIME-Version: 1.0 In-Reply-To: <1360116290-23849-2-git-send-email-nzimmer@sgi.com> References: <74F10842A85F514CA8D8C487E74474BB2D2F925E@P-EXMB1-DC21.corp.sgi.com> <1360116290-23849-1-git-send-email-nzimmer@sgi.com> <1360116290-23849-2-git-send-email-nzimmer@sgi.com> Date: Wed, 6 Feb 2013 08:17:45 +0530 Message-ID: Subject: Re: [PATCH v2 linux-next 1/2] cpufreq: Convert the cpufreq_driver_lock to a rwlock From: Viresh Kumar To: Nathan Zimmer Cc: rjw@sisk.pl, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, cpufreq@vger.kernel.org Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 6 February 2013 07:34, Nathan Zimmer wrote: > This eliminates the contention I am seeing in __cpufreq_cpu_get. > It also nicely stages the lock to be replaced by the rcu. > > Cc: Viresh Kumar > Cc: "Rafael J. Wysocki" > Signed-off-by: Nathan Zimmer > --- > drivers/cpufreq/cpufreq.c | 42 +++++++++++++++++++++--------------------- > 1 file changed, 21 insertions(+), 21 deletions(-) Acked-by: Viresh Kumar