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GET /api/patches/806900/?format=api
{ "id": 806900, "url": "http://patchwork.ozlabs.org/api/patches/806900/?format=api", "web_url": "http://patchwork.ozlabs.org/project/sparclinux/patch/1503972142-289376-7-git-send-email-pasha.tatashin@oracle.com/", "project": { "id": 10, "url": "http://patchwork.ozlabs.org/api/projects/10/?format=api", "name": "Linux SPARC Development ", "link_name": "sparclinux", "list_id": "sparclinux.vger.kernel.org", "list_email": "sparclinux@vger.kernel.org", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<1503972142-289376-7-git-send-email-pasha.tatashin@oracle.com>", "list_archive_url": null, "date": "2017-08-29T02:02:17", "name": "[v7,06/11] mm: zero struct pages during initialization", "commit_ref": null, "pull_url": null, "state": "not-applicable", "archived": false, "hash": "bbba9dd70f2b4ea93ef2afb134b614f5c710b8fc", "submitter": { "id": 71010, "url": "http://patchwork.ozlabs.org/api/people/71010/?format=api", "name": "Pavel Tatashin", "email": "pasha.tatashin@oracle.com" }, "delegate": { "id": 34, "url": "http://patchwork.ozlabs.org/api/users/34/?format=api", "username": "davem", "first_name": "David", "last_name": "Miller", "email": "davem@davemloft.net" }, "mbox": "http://patchwork.ozlabs.org/project/sparclinux/patch/1503972142-289376-7-git-send-email-pasha.tatashin@oracle.com/mbox/", "series": [ { "id": 285, "url": "http://patchwork.ozlabs.org/api/series/285/?format=api", "web_url": "http://patchwork.ozlabs.org/project/sparclinux/list/?series=285", "date": "2017-08-29T02:02:11", "name": "complete deferred page initialization", "version": 7, "mbox": "http://patchwork.ozlabs.org/series/285/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/806900/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/806900/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<sparclinux-owner@vger.kernel.org>", "X-Original-To": "patchwork-incoming@ozlabs.org", "Delivered-To": "patchwork-incoming@ozlabs.org", "Authentication-Results": "ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=vger.kernel.org\n\t(client-ip=209.132.180.67; helo=vger.kernel.org;\n\tenvelope-from=sparclinux-owner@vger.kernel.org;\n\treceiver=<UNKNOWN>)", "Received": [ "from vger.kernel.org (vger.kernel.org [209.132.180.67])\n\tby ozlabs.org (Postfix) with ESMTP id 3xhBmM5TQzz9s7c\n\tfor <patchwork-incoming@ozlabs.org>;\n\tTue, 29 Aug 2017 12:05:07 +1000 (AEST)", "(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n\tid S1751443AbdH2CEL (ORCPT <rfc822;patchwork-incoming@ozlabs.org>);\n\tMon, 28 Aug 2017 22:04:11 -0400", "from userp1040.oracle.com ([156.151.31.81]:44652 \"EHLO\n\tuserp1040.oracle.com\" rhost-flags-OK-OK-OK-OK) by vger.kernel.org\n\twith ESMTP id S1751257AbdH2CEJ (ORCPT\n\t<rfc822; sparclinux@vger.kernel.org>); Mon, 28 Aug 2017 22:04:09 -0400", "from userv0021.oracle.com (userv0021.oracle.com [156.151.31.71])\n\tby userp1040.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2) with\n\tESMTP id v7T22Zrs022420\n\t(version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256\n\tverify=OK); Tue, 29 Aug 2017 02:02:36 GMT", "from userv0121.oracle.com (userv0121.oracle.com [156.151.31.72])\n\tby userv0021.oracle.com (8.14.4/8.14.4) with ESMTP id v7T22Zmn007054\n\t(version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256\n\tverify=OK); Tue, 29 Aug 2017 02:02:35 GMT", "from abhmp0011.oracle.com (abhmp0011.oracle.com [141.146.116.17])\n\tby userv0121.oracle.com (8.14.4/8.13.8) with ESMTP id\n\tv7T22Yh5011205; Tue, 29 Aug 2017 02:02:34 GMT", "from ca-ldom-ol-build-1.us.oracle.com (/10.129.68.23)\n\tby default (Oracle Beehive Gateway v4.0)\n\twith ESMTP ; Mon, 28 Aug 2017 19:02:34 -0700" ], "From": "Pavel Tatashin <pasha.tatashin@oracle.com>", "To": "linux-kernel@vger.kernel.org, sparclinux@vger.kernel.org,\n\tlinux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org,\n\tlinux-s390@vger.kernel.org, linux-arm-kernel@lists.infradead.org,\n\tx86@kernel.org, kasan-dev@googlegroups.com, borntraeger@de.ibm.com,\n\theiko.carstens@de.ibm.com, davem@davemloft.net,\n\twilly@infradead.org, mhocko@kernel.org, ard.biesheuvel@linaro.org,\n\twill.deacon@arm.com, catalin.marinas@arm.com, sam@ravnborg.org,\n\tmgorman@techsingularity.net, Steven.Sistare@oracle.com,\n\tdaniel.m.jordan@oracle.com, bob.picco@oracle.com", "Subject": "[PATCH v7 06/11] mm: zero struct pages during initialization", "Date": "Mon, 28 Aug 2017 22:02:17 -0400", "Message-Id": "<1503972142-289376-7-git-send-email-pasha.tatashin@oracle.com>", "X-Mailer": "git-send-email 1.7.1", "In-Reply-To": "<1503972142-289376-1-git-send-email-pasha.tatashin@oracle.com>", "References": "<1503972142-289376-1-git-send-email-pasha.tatashin@oracle.com>", "X-Source-IP": "userv0021.oracle.com [156.151.31.71]", "Sender": "sparclinux-owner@vger.kernel.org", "Precedence": "bulk", "List-ID": "<sparclinux.vger.kernel.org>", "X-Mailing-List": "sparclinux@vger.kernel.org" }, "content": "Add struct page zeroing as a part of initialization of other fields in\n__init_single_page().\n\nThis single thread performance collected on: Intel(R) Xeon(R) CPU E7-8895\nv3 @ 2.60GHz with 1T of memory (268400646 pages in 8 nodes):\n\n BASE FIX\nsparse_init 11.244671836s 0.007199623s\nzone_sizes_init 4.879775891s 8.355182299s\n --------------------------\nTotal 16.124447727s 8.362381922s\n\nsparse_init is where memory for struct pages is zeroed, and the zeroing\npart is moved later in this patch into __init_single_page(), which is\ncalled from zone_sizes_init().\n\nSigned-off-by: Pavel Tatashin <pasha.tatashin@oracle.com>\nReviewed-by: Steven Sistare <steven.sistare@oracle.com>\nReviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com>\nReviewed-by: Bob Picco <bob.picco@oracle.com>\nAcked-by: Michal Hocko <mhocko@suse.com>\n---\n include/linux/mm.h | 9 +++++++++\n mm/page_alloc.c | 1 +\n 2 files changed, 10 insertions(+)", "diff": "diff --git a/include/linux/mm.h b/include/linux/mm.h\nindex 46b9ac5e8569..183ac5e733db 100644\n--- a/include/linux/mm.h\n+++ b/include/linux/mm.h\n@@ -93,6 +93,15 @@ extern int mmap_rnd_compat_bits __read_mostly;\n #define mm_forbids_zeropage(X)\t(0)\n #endif\n \n+/*\n+ * On some architectures it is expensive to call memset() for small sizes.\n+ * Those architectures should provide their own implementation of \"struct page\"\n+ * zeroing by defining this macro in <asm/pgtable.h>.\n+ */\n+#ifndef mm_zero_struct_page\n+#define mm_zero_struct_page(pp) ((void)memset((pp), 0, sizeof(struct page)))\n+#endif\n+\n /*\n * Default maximum number of active map areas, this limits the number of vmas\n * per mm struct. Users can overwrite this number by sysctl but there is a\ndiff --git a/mm/page_alloc.c b/mm/page_alloc.c\nindex 8293815ca85d..4d67fe3dd172 100644\n--- a/mm/page_alloc.c\n+++ b/mm/page_alloc.c\n@@ -1169,6 +1169,7 @@ static void free_one_page(struct zone *zone,\n static void __meminit __init_single_page(struct page *page, unsigned long pfn,\n \t\t\t\tunsigned long zone, int nid)\n {\n+\tmm_zero_struct_page(page);\n \tset_page_links(page, zone, nid, pfn);\n \tinit_page_count(page);\n \tpage_mapcount_reset(page);\n", "prefixes": [ "v7", "06/11" ] }