From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf1-f199.google.com (mail-pf1-f199.google.com [209.85.210.199]) by kanga.kvack.org (Postfix) with ESMTP id 94B0C6B0003 for ; Thu, 11 Oct 2018 18:16:57 -0400 (EDT) Received: by mail-pf1-f199.google.com with SMTP id a64-v6so9932757pfg.16 for ; Thu, 11 Oct 2018 15:16:57 -0700 (PDT) Received: from mga18.intel.com (mga18.intel.com. [134.134.136.126]) by mx.google.com with ESMTPS id r29-v6si24916614pff.262.2018.10.11.15.16.55 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 11 Oct 2018 15:16:56 -0700 (PDT) Subject: [mm PATCH v2 0/6] Deferred page init improvements From: Alexander Duyck Date: Thu, 11 Oct 2018 15:13:28 -0700 Message-ID: <20181011221237.1925.85591.stgit@localhost.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: linux-mm@kvack.org, akpm@linux-foundation.org Cc: pavel.tatashin@microsoft.com, mhocko@suse.com, dave.jiang@intel.com, alexander.h.duyck@linux.intel.com, linux-kernel@vger.kernel.org, willy@infradead.org, davem@davemloft.net, yi.z.zhang@linux.intel.com, khalid.aziz@oracle.com, rppt@linux.vnet.ibm.com, vbabka@suse.cz, sparclinux@vger.kernel.org, dan.j.williams@intel.com, ldufour@linux.vnet.ibm.com, mgorman@techsingularity.net, mingo@kernel.org, kirill.shutemov@linux.intel.com This patchset is essentially a refactor of the page initialization logic that is meant to provide for better code reuse while providing a significant improvement in deferred page initialization performance. In my testing I have seen a 60% reduction in the time needed for deferred memory initialization on two different x86_64 based test systems I have. In addition this provides a very slight improvement for the hotplug memory initialization, although the improvement doesn't exceed 5% from what I can tell and that is to be expected since most of the changes related to hotplug init are mostly just code clean-up to allow for reuse. The biggest gains of this patchset come from not having to test each pfn multiple times to see if it is valid and if it is actually a part of the node being initialized. v1->v2: Fixed build issue on PowerPC due to page struct size being 56 Added new patch that removed __SetPageReserved call for hotplug --- Alexander Duyck (6): mm: Use mm_zero_struct_page from SPARC on all 64b architectures mm: Drop meminit_pfn_in_nid as it is redundant mm: Use memblock/zone specific iterator for handling deferred page init mm: Do not set reserved flag for hotplug memory mm: Move hot-plug specific memory init into separate functions and optimize mm: Use common iterator for deferred_init_pages and deferred_free_pages arch/sparc/include/asm/pgtable_64.h | 30 -- include/linux/memblock.h | 58 ++++ include/linux/mm.h | 34 ++ mm/memblock.c | 63 ++++ mm/page_alloc.c | 552 +++++++++++++++++++++-------------- 5 files changed, 483 insertions(+), 254 deletions(-) --