From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-io0-f198.google.com (mail-io0-f198.google.com [209.85.223.198]) by kanga.kvack.org (Postfix) with ESMTP id A8AC96B0006 for ; Tue, 13 Feb 2018 14:32:15 -0500 (EST) Received: by mail-io0-f198.google.com with SMTP id z6so18121046iob.3 for ; Tue, 13 Feb 2018 11:32:15 -0800 (PST) Received: from aserp2130.oracle.com (aserp2130.oracle.com. [141.146.126.79]) by mx.google.com with ESMTPS id h101si1770629ioi.229.2018.02.13.11.32.13 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 13 Feb 2018 11:32:14 -0800 (PST) From: Pavel Tatashin Subject: [PATCH v3 0/4] optimize memory hotplug Date: Tue, 13 Feb 2018 14:31:55 -0500 Message-Id: <20180213193159.14606-1-pasha.tatashin@oracle.com> Sender: owner-linux-mm@kvack.org List-ID: To: steven.sistare@oracle.com, daniel.m.jordan@oracle.com, akpm@linux-foundation.org, mgorman@techsingularity.net, mhocko@suse.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, gregkh@linuxfoundation.org, vbabka@suse.cz, bharata@linux.vnet.ibm.com, tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, x86@kernel.org, dan.j.williams@intel.com, kirill.shutemov@linux.intel.com, bhe@redhat.com Changelog: v2 - v3 Fixed two issues found during testing Addressed Kbuild warning reports v1 - v2 Added struct page poisoning checking in order to verify that struct pages are never accessed until initialized during memory hotplug This patchset: - Improves hotplug performance by eliminating a number of struct page traverses during memory hotplug. - Fixes some issues with hotplugging, where boundaries were not properly checked. And on x86 block size was not properly aligned with end of memory - Also, potentially improves boot performance by eliminating condition from __init_single_page(). - Adds robustness by verifying that that struct pages are correctly poisoned when flags are accessed. The following experiments were performed on Xeon(R) CPU E7-8895 v3 @ 2.60GHz with 1T RAM: booting in qemu with 960G of memory, time to initialize struct pages: no-kvm: TRY1 TRY2 BEFORE: 39.433668 39.39705 AFTER: 36.903781 36.989329 with-kvm: BEFORE: 10.977447 11.103164 AFTER: 10.929072 10.751885 Hotplug 896G memory: no-kvm: TRY1 TRY2 BEFORE: 848.740000 846.910000 AFTER: 783.070000 786.560000 with-kvm: TRY1 TRY2 BEFORE: 34.410000 33.57 AFTER: 29.810000 29.580000 Pavel Tatashin (4): mm/memory_hotplug: enforce block size aligned range check x86/mm/memory_hotplug: determine block size based on the end of boot memory mm: uninitialized struct page poisoning sanity checking mm/memory_hotplug: optimize memory hotplug arch/x86/mm/init_64.c | 33 +++++++++++++++++++++++++++++---- drivers/base/memory.c | 38 +++++++++++++++++++++----------------- drivers/base/node.c | 17 ++++++++++------- include/linux/memory_hotplug.h | 2 ++ include/linux/mm.h | 4 +++- include/linux/node.h | 4 ++-- include/linux/page-flags.h | 22 +++++++++++++++++----- mm/memblock.c | 2 +- mm/memory_hotplug.c | 36 ++++++++++-------------------------- mm/page_alloc.c | 28 ++++++++++------------------ mm/sparse.c | 29 ++++++++++++++++++++++++++--- 11 files changed, 131 insertions(+), 84 deletions(-) -- 2.16.1 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org