From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753384AbYKLM2b (ORCPT ); Wed, 12 Nov 2008 07:28:31 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751988AbYKLM1n (ORCPT ); Wed, 12 Nov 2008 07:27:43 -0500 Received: from one.firstfloor.org ([213.235.205.2]:39781 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751816AbYKLM1l (ORCPT ); Wed, 12 Nov 2008 07:27:41 -0500 From: Andi Kleen References: <20081112145.328971960@firstfloor.org> In-Reply-To: <20081112145.328971960@firstfloor.org> To: mingo@elte.hu, linux-kernel@vger.kernel.org, peterz@infradead.org Subject: [PATCH] [2/4] SCHED: Mark all frequently used sysctls __read_mostly Message-Id: <20081112124510.652EB3E6611@basil.firstfloor.org> Date: Wed, 12 Nov 2008 13:45:10 +0100 (CET) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org There are more optimizations possible here, but that's for another patch. Signed-off-by: Andi Kleen --- kernel/sched.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) Index: linux-2.6.28-rc4-test/kernel/sched.c =================================================================== --- linux-2.6.28-rc4-test.orig/kernel/sched.c 2008-11-12 12:32:52.000000000 +0100 +++ linux-2.6.28-rc4-test/kernel/sched.c 2008-11-12 12:52:52.000000000 +0100 @@ -686,7 +686,7 @@ #define SCHED_FEAT(name, enabled) \ (1UL << __SCHED_FEAT_##name) * enabled | -const_debug unsigned int sysctl_sched_features = +const_debug unsigned int sysctl_sched_features __read_mostly = #include "sched_features.h" 0; @@ -809,26 +809,26 @@ * Number of tasks to iterate in a single balance run. * Limited because this is done with IRQs disabled. */ -const_debug unsigned int sysctl_sched_nr_migrate = 32; +const_debug unsigned int sysctl_sched_nr_migrate __read_mostly = 32; /* * ratelimit for updating the group shares. * default: 0.25ms */ -unsigned int sysctl_sched_shares_ratelimit = 250000; +unsigned int sysctl_sched_shares_ratelimit __read_mostly = 250000; /* * Inject some fuzzyness into changing the per-cpu group shares * this avoids remote rq-locks at the expense of fairness. * default: 4 */ -unsigned int sysctl_sched_shares_thresh = 4; +unsigned int sysctl_sched_shares_thresh __read_mostly = 4; /* * period over which we measure -rt task cpu usage in us. * default: 1s */ -unsigned int sysctl_sched_rt_period = 1000000; +unsigned int sysctl_sched_rt_period __read_mostly = 1000000; static __read_mostly int scheduler_running;