Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759363Ab2JKUth (ORCPT ); Thu, 11 Oct 2012 16:49:37 -0400 Received: from mga14.intel.com ([143.182.124.37]:53033 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759263Ab2JKUte (ORCPT ); Thu, 11 Oct 2012 16:49:34 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.80,573,1344236400"; d="scan'208";a="203427539" From: Alexander Duyck Subject: [PATCH v2 0/8] Improve performance of VM translation on x86_64 To: tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, andi@firstfloor.org Cc: linux-kernel@vger.kernel.org, x86@kernel.org Date: Thu, 11 Oct 2012 13:49:52 -0700 Message-ID: <20121011204324.12787.30514.stgit@gitlad.jf.intel.com> User-Agent: StGIT/0.14.2 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2567 Lines: 50 This patch series is meant to address several issues I encountered with VM translations on x86_64. In my testing I found that swiotlb was incurring up to a 5% processing overhead due to calls to __phys_addr. To address that I have updated swiotlb to use physical addresses instead of virtual addresses to reduce the need to call __phys_addr. However those patches didn't address the other callers. With these patches applied I am able to achieve an additional 1% to 2% performance gain on top of the changes to swiotlb. The first 2 patches are the performance optimizations that result in the 1% to 2% increase in overall performance. The remaining patches are various cleanups for a number of spots where __pa or virt_to_phys was being called and was not needed or __pa_symbol could have been used. --- Alexander Duyck (8): x86/lguest: Use __pa_symbol instead of __pa on C visible symbols x86/acpi: Use __pa_symbol instead of __pa on C visible symbols x86/xen: Use __pa_symbol instead of __pa on C visible symbols x86/ftrace: Use __pa_symbol instead of __pa on C visible symbols x86: Use __pa_symbol instead of __pa on C visible symbols x86: Drop 4 unnecessary calls to __pa_symbol x86: Make it so that __pa_symbol can only process kernel symbols on x86_64 x86: Improve __phys_addr performance by making use of carry flags and inlining arch/x86/include/asm/page.h | 3 ++- arch/x86/include/asm/page_32.h | 1 + arch/x86/include/asm/page_64_types.h | 20 +++++++++++++++++-- arch/x86/kernel/acpi/sleep.c | 2 +- arch/x86/kernel/cpu/intel.c | 2 +- arch/x86/kernel/ftrace.c | 4 ++-- arch/x86/kernel/head32.c | 4 ++-- arch/x86/kernel/head64.c | 4 ++-- arch/x86/kernel/setup.c | 16 ++++++++-------- arch/x86/kernel/x8664_ksyms_64.c | 3 +++ arch/x86/lguest/boot.c | 3 ++- arch/x86/mm/pageattr.c | 8 ++++---- arch/x86/mm/physaddr.c | 35 ++++++++++++++++++++++++++++------ arch/x86/platform/efi/efi.c | 4 ++-- arch/x86/realmode/init.c | 8 ++++---- arch/x86/xen/mmu.c | 19 ++++++++++-------- 16 files changed, 91 insertions(+), 45 deletions(-) -- -- 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/