From patchwork Fri Jun 18 03:44:40 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Feng Tang X-Patchwork-Id: 12330051 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 24CA4C49EA4 for ; Fri, 18 Jun 2021 03:45:01 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id CCA2B61245 for ; Fri, 18 Jun 2021 03:45:00 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CCA2B61245 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 738396B0072; Thu, 17 Jun 2021 23:45:00 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 6E9C86B0073; Thu, 17 Jun 2021 23:45:00 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 58A1C6B0074; Thu, 17 Jun 2021 23:45:00 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0106.hostedemail.com [216.40.44.106]) by kanga.kvack.org (Postfix) with ESMTP id 1C1BF6B0072 for ; Thu, 17 Jun 2021 23:45:00 -0400 (EDT) Received: from smtpin28.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id ABABC181AEF09 for ; Fri, 18 Jun 2021 03:44:59 +0000 (UTC) X-FDA: 78265453518.28.4C543EC Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by imf12.hostedemail.com (Postfix) with ESMTP id 5B91454C for ; Fri, 18 Jun 2021 03:44:57 +0000 (UTC) IronPort-SDR: Ol7W+JBy6umjJwdIbQJHdqs2vhoq5UBg3Gh6854y6wNuo/kgvnaIZy8ujagD+wzW6u5OyGJa7C jHLU7kXglQfw== X-IronPort-AV: E=McAfee;i="6200,9189,10018"; a="203467016" X-IronPort-AV: E=Sophos;i="5.83,281,1616482800"; d="scan'208";a="203467016" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Jun 2021 20:44:57 -0700 IronPort-SDR: qre1y2t9vg8YJgpkUnAjXB2PyDD2TieBtFaqjrZwNpX7uwE4Asp0FAL2iItFqRdEwdrcEAWOyc vVNaUyf4WDHQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.83,281,1616482800"; d="scan'208";a="485539825" Received: from shbuild999.sh.intel.com ([10.239.147.94]) by orsmga001.jf.intel.com with ESMTP; 17 Jun 2021 20:44:54 -0700 From: Feng Tang To: linux-mm@kvack.org, Andrew Morton , Michal Hocko , David Rientjes , Dave Hansen , Ben Widawsky Cc: linux-kernel@vger.kernel.org, linux-api@vger.kernel.org, Andrea Arcangeli , Mel Gorman , Mike Kravetz , Randy Dunlap , Vlastimil Babka , Andi Kleen , Dan Williams , ying.huang@intel.com, Feng Tang Subject: [PATCH v5 -mm 2/6] mm/memplicy: add page allocation function for MPOL_PREFERRED_MANY policy Date: Fri, 18 Jun 2021 11:44:40 +0800 Message-Id: <1623987884-43576-3-git-send-email-feng.tang@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1623987884-43576-1-git-send-email-feng.tang@intel.com> References: <1623987884-43576-1-git-send-email-feng.tang@intel.com> X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 5B91454C X-Stat-Signature: 7uaw3tzzer8byg6xh38qw5e9u61zxok4 Authentication-Results: imf12.hostedemail.com; dkim=none; spf=none (imf12.hostedemail.com: domain of feng.tang@intel.com has no SPF policy when checking 192.55.52.93) smtp.mailfrom=feng.tang@intel.com; dmarc=fail reason="No valid SPF, No valid DKIM" header.from=intel.com (policy=none) X-HE-Tag: 1623987897-276047 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: The semantics of MPOL_PREFERRED_MANY is similar to MPOL_PREFERRED, that it will first try to allocate memory from the preferred node(s), and fallback to all nodes in system when first try fails. Add a dedicated function for it just like 'interleave' policy. Link: https://lore.kernel.org/r/20200630212517.308045-9-ben.widawsky@intel.com Suggested-by: Michal Hocko Co-developed-by: Ben Widawsky Signed-off-by: Ben Widawsky Signed-off-by: Feng Tang --- mm/mempolicy.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/mm/mempolicy.c b/mm/mempolicy.c index 17b5800b7dcc..d17bf018efcc 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -2153,6 +2153,25 @@ static struct page *alloc_page_interleave(gfp_t gfp, unsigned order, return page; } +static struct page *alloc_page_preferred_many(gfp_t gfp, unsigned int order, + struct mempolicy *pol) +{ + struct page *page; + + /* + * This is a two pass approach. The first pass will only try the + * preferred nodes but skip the direct reclaim and allow the + * allocation to fail, while the second pass will try all the + * nodes in system. + */ + page = __alloc_pages(((gfp | __GFP_NOWARN) & ~__GFP_DIRECT_RECLAIM), + order, first_node(pol->nodes), &pol->nodes); + if (!page) + page = __alloc_pages(gfp, order, numa_node_id(), NULL); + + return page; +} + /** * alloc_pages_vma - Allocate a page for a VMA. * @gfp: GFP flags.