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=-2.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS, T_DKIMWL_WL_HIGH,UNPARSEABLE_RELAY,USER_AGENT_GIT 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 1097DC43144 for ; Thu, 28 Jun 2018 17:34:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BB82724889 for ; Thu, 28 Jun 2018 17:34:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="DT7KOKRN" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BB82724889 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=oracle.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 S965951AbeF1Rdr (ORCPT ); Thu, 28 Jun 2018 13:33:47 -0400 Received: from userp2130.oracle.com ([156.151.31.86]:50372 "EHLO userp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965048AbeF1Rdp (ORCPT ); Thu, 28 Jun 2018 13:33:45 -0400 Received: from pps.filterd (userp2130.oracle.com [127.0.0.1]) by userp2130.oracle.com (8.16.0.22/8.16.0.22) with SMTP id w5SHSTgb009848; Thu, 28 Jun 2018 17:30:19 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : subject : date : message-id; s=corp-2017-10-26; bh=Uu1TXHVoCh1VJycZExMXiIp0BMZr175rrSkXntgkytg=; b=DT7KOKRNSaTdPMWMPc1aREqicmJSbrfnFSWD+3pFt3qV7PlAZhr/okQCQ7dI+rGvJE4/ K/aTmG8yBEzooNscI14L3ldHN2gdPy8LXOEdIDEa32z4ioNWpUavKVhMS2v1iwC8Xcfk pn0FP1adtd0Ylb3Tqoz6PCOcyvhIg0Rhr7Tvz8aqvl1U8v8YP4n5252u/sQy/5e2xHA5 8d//g+hNm/fIlb8cJslQjUkATQfoa3t4y9FTRkLgKNHQ4GympDzZRSAGHe9/W6Y3XIWH Ul/eayrLaEbJzlEBGKyF1+Cv/n9E5j8p4hBM3etPut928yCZWJ7WzRCGfRcj/TXySxAa Lg== Received: from userv0022.oracle.com (userv0022.oracle.com [156.151.31.74]) by userp2130.oracle.com with ESMTP id 2jum5838fj-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 28 Jun 2018 17:30:19 +0000 Received: from aserv0122.oracle.com (aserv0122.oracle.com [141.146.126.236]) by userv0022.oracle.com (8.14.4/8.14.4) with ESMTP id w5SHUIfD007226 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 28 Jun 2018 17:30:18 GMT Received: from abhmp0019.oracle.com (abhmp0019.oracle.com [141.146.116.25]) by aserv0122.oracle.com (8.14.4/8.14.4) with ESMTP id w5SHUFd2010468; Thu, 28 Jun 2018 17:30:16 GMT Received: from localhost.localdomain (/73.69.118.222) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 28 Jun 2018 10:30:15 -0700 From: Pavel Tatashin To: steven.sistare@oracle.com, daniel.m.jordan@oracle.com, linux-kernel@vger.kernel.org, akpm@linux-foundation.org, kirill.shutemov@linux.intel.com, mhocko@suse.com, linux-mm@kvack.org, dan.j.williams@intel.com, jack@suse.cz, jglisse@redhat.com, jrdr.linux@gmail.com, bhe@redhat.com, gregkh@linuxfoundation.org, vbabka@suse.cz, richard.weiyang@gmail.com, dave.hansen@intel.com, rientjes@google.com, mingo@kernel.org Subject: [PATCH v1 0/2] sparse_init rewrite Date: Thu, 28 Jun 2018 13:30:08 -0400 Message-Id: <20180628173010.23849-1-pasha.tatashin@oracle.com> X-Mailer: git-send-email 2.18.0 X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=8938 signatures=668703 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=533 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1806210000 definitions=main-1806280197 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org In sparse_init() we allocate two large buffers to temporary hold usemap and memmap for the whole machine. However, we can avoid doing that if we changed sparse_init() to operated on per-node bases instead of doing it on the whole machine beforehand. As shown by Baoquan http://lkml.kernel.org/r/20180628062857.29658-1-bhe@redhat.com The buffers are large enough to cause machine stop to boot on small memory systems. These patches should be applied on top of Baoquan's work, as CONFIG_SPARSEMEM_ALLOC_MEM_MAP_TOGETHER is removed in that work. For the ease of review, I split this work so the first patch only adds new interfaces, the second patch enables them, and removes the old ones. Pavel Tatashin (2): mm/sparse: add sparse_init_nid() mm/sparse: start using sparse_init_nid(), and remove old code include/linux/mm.h | 9 +- mm/sparse-vmemmap.c | 44 ++++--- mm/sparse.c | 285 ++++++++++++++------------------------------ 3 files changed, 125 insertions(+), 213 deletions(-) -- 2.18.0