From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 465BFC43382 for ; Wed, 26 Sep 2018 23:29:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C452F21565 for ; Wed, 26 Sep 2018 23:29:11 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C452F21565 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726561AbeI0Fo3 (ORCPT ); Thu, 27 Sep 2018 01:44:29 -0400 Received: from mga04.intel.com ([192.55.52.120]:33789 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726186AbeI0Fo3 (ORCPT ); Thu, 27 Sep 2018 01:44:29 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga104.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 26 Sep 2018 16:29:09 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.54,308,1534834800"; d="scan'208";a="86873123" Received: from ahduyck-mobl.amr.corp.intel.com (HELO localhost.localdomain) ([10.7.198.154]) by orsmga003.jf.intel.com with ESMTP; 26 Sep 2018 16:28:20 -0700 Subject: [RFC mm PATCH 0/5] mm: Deferred page init improvements From: Alexander Duyck To: sparclinux@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: pavel.tatashin@microsoft.com, mhocko@suse.com, dave.jiang@intel.com, alexander.h.duyck@linux.intel.com, dan.j.williams@intel.com, willy@infradead.org, mingo@kernel.org, khalid.aziz@oracle.com, rppt@linux.vnet.ibm.com, vbabka@suse.cz, akpm@linux-foundation.org, ldufour@linux.vnet.ibm.com, davem@davemloft.net, kirill.shutemov@linux.intel.com Date: Wed, 26 Sep 2018 16:28:20 -0700 Message-ID: <20180926232117.17365.72207.stgit@localhost.localdomain> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patchset is essentially a refactor of the page initialization logic to provide for better code reuse while providing a significant improvement in deferred page initialization performance. In my testing I have seen a 3:1 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 initialization are just code clean-up to allow for reuse. I had been considering using a large memset for the entire pageblock I was initializing which showed a significant speedup for persistent memory init however that showed no improvements to a slight regression for regular deferred initialization of standard memory. --- Alexander Duyck (5): 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: 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 | 33 ++ mm/memblock.c | 63 ++++ mm/page_alloc.c | 555 +++++++++++++++++++++-------------- 5 files changed, 485 insertions(+), 254 deletions(-) --