Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757536Ab0BEU6X (ORCPT ); Fri, 5 Feb 2010 15:58:23 -0500 Received: from e7.ny.us.ibm.com ([32.97.182.137]:41751 "EHLO e7.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757495Ab0BEU6V (ORCPT ); Fri, 5 Feb 2010 15:58:21 -0500 Subject: [PATCHv4 1/2] sched: enable ARCH_POWER From: Joel Schopp To: Peter Zijlstra Cc: ego@in.ibm.com, linuxppc-dev@lists.ozlabs.org, Ingo Molnar , linux-kernel@vger.kernel.org, benh@kernel.crashing.org, jschopp@austin.ibm.com In-Reply-To: <1264720833.9660.21.camel@jschopp-laptop> References: <1264017638.5717.121.camel@jschopp-laptop> <1264017764.5717.127.camel@jschopp-laptop> <1264548486.12239.55.camel@jschopp-laptop> <1264720833.9660.21.camel@jschopp-laptop> Content-Type: text/plain; charset="UTF-8" Date: Fri, 05 Feb 2010 14:57:52 -0600 Message-ID: <1265403472.6089.40.camel@jschopp-laptop> Mime-Version: 1.0 X-Mailer: Evolution 2.28.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1480 Lines: 44 Enable the scheduler feature that allows use of arch_scale_smt_power. Stub out the broken x86 implementation. Signed-off-by: Joel Schopp --- Index: linux-2.6.git/kernel/sched_features.h =================================================================== --- linux-2.6.git.orig/kernel/sched_features.h +++ linux-2.6.git/kernel/sched_features.h @@ -102,7 +102,7 @@ SCHED_FEAT(CACHE_HOT_BUDDY, 1) /* * Use arch dependent cpu power functions */ -SCHED_FEAT(ARCH_POWER, 0) +SCHED_FEAT(ARCH_POWER, 1) SCHED_FEAT(HRTICK, 0) SCHED_FEAT(DOUBLE_TICK, 0) Index: linux-2.6.git/arch/x86/kernel/cpu/sched.c =================================================================== --- linux-2.6.git.orig/arch/x86/kernel/cpu/sched.c +++ linux-2.6.git/arch/x86/kernel/cpu/sched.c @@ -44,11 +44,9 @@ unsigned long arch_scale_freq_power(stru unsigned long arch_scale_smt_power(struct sched_domain *sd, int cpu) { /* - * aperf/mperf already includes the smt gain + * aperf/mperf already includes the smt gain, but represents capacity + * as 0 when idle. So for now just return default. */ - if (boot_cpu_has(X86_FEATURE_APERFMPERF)) - return SCHED_LOAD_SCALE; - return default_scale_smt_power(sd, cpu); } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/