From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e8.ny.us.ibm.com (e8.ny.us.ibm.com [32.97.182.138]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "e8.ny.us.ibm.com", Issuer "Equifax" (verified OK)) by ozlabs.org (Postfix) with ESMTPS id 9F3A9B89DC for ; Sat, 6 Feb 2010 07:58:23 +1100 (EST) Received: from d01relay05.pok.ibm.com (d01relay05.pok.ibm.com [9.56.227.237]) by e8.ny.us.ibm.com (8.14.3/8.13.1) with ESMTP id o15KnNIF025412 for ; Fri, 5 Feb 2010 15:49:23 -0500 Received: from d03av03.boulder.ibm.com (d03av03.boulder.ibm.com [9.17.195.169]) by d01relay05.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id o15KwKxe135012 for ; Fri, 5 Feb 2010 15:58:20 -0500 Received: from d03av03.boulder.ibm.com (loopback [127.0.0.1]) by d03av03.boulder.ibm.com (8.14.3/8.13.1/NCO v10.0 AVout) with ESMTP id o15KvnGU018985 for ; Fri, 5 Feb 2010 13:57:49 -0700 Subject: [PATCHv4 0/2] sched: arch_scale_smt_powers From: Joel Schopp To: Peter Zijlstra In-Reply-To: <1264720808.9660.18.camel@jschopp-laptop> References: <1264017638.5717.121.camel@jschopp-laptop> <1264548479.12239.54.camel@jschopp-laptop> <1264720808.9660.18.camel@jschopp-laptop> Content-Type: text/plain; charset="UTF-8" Date: Fri, 05 Feb 2010 14:57:46 -0600 Message-ID: <1265403466.6089.39.camel@jschopp-laptop> Mime-Version: 1.0 Cc: ego@in.ibm.com, linux-kernel@vger.kernel.org, Ingo Molnar , linuxppc-dev@lists.ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , The new Power7 processor has 4 way SMT. This 4 way SMT benefits from dynamic power updates that arch_scale_smt_power was designed to provide. The first patch fixes a generic scheduler bug necessary for arch_scale_smt to properly function. The second patch implements arch_scale_smt_power for powerpc, and in particular for Power7 processors. Version 2 changes: - Drop Patch 1 from the original series since it's in the -tip tree now - Move enabling the cpu feature into it's own patch (now patch 1) - Add stubbing out broken x86 implementation to patch 1 - clean up coding style in patch 2 Version 3 changes: - Added a comment to Patch 2 Version 4 changes: - Wrap arch_scale_smt_power() in #ifdef CONFIG_SCHED_SMT in Patch 2 --- Joel Schopp (2): sched: enable ARCH_POWER powerpc: implement arch_scale_smt_power for Power7 arch/powerpc/include/asm/cputable.h | 3 + arch/powerpc/kernel/smp.c | 58 ++++++++++++++++++++++++++++++++++++ arch/x86/kernel/cpu/sched.c | 6 +-- kernel/sched_features.h | 2 - 4 files changed, 63 insertions(+), 6 deletions(-)