From patchwork Thu Apr 15 10:35:44 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Oscar Salvador X-Patchwork-Id: 12205059 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=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 76639C43460 for ; Thu, 15 Apr 2021 10:36:06 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 37F36613A9 for ; Thu, 15 Apr 2021 10:36:06 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 37F36613A9 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 4051B6B0075; Thu, 15 Apr 2021 06:35:56 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 3DE486B0078; Thu, 15 Apr 2021 06:35:56 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 2321F6B007B; Thu, 15 Apr 2021 06:35:56 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0104.hostedemail.com [216.40.44.104]) by kanga.kvack.org (Postfix) with ESMTP id 018136B0075 for ; Thu, 15 Apr 2021 06:35:55 -0400 (EDT) Received: from smtpin40.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id AE220180F8BAB for ; Thu, 15 Apr 2021 10:35:55 +0000 (UTC) X-FDA: 78034245870.40.A680364 Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) by imf08.hostedemail.com (Postfix) with ESMTP id 10EA480192D4 for ; Thu, 15 Apr 2021 10:35:40 +0000 (UTC) X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 3A7F2B22F; Thu, 15 Apr 2021 10:35:54 +0000 (UTC) From: Oscar Salvador To: Andrew Morton Cc: Mike Kravetz , Vlastimil Babka , David Hildenbrand , Michal Hocko , Muchun Song , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Oscar Salvador Subject: [PATCH v8 7/7] mm,page_alloc: Drop unnecessary checks from pfn_range_valid_contig Date: Thu, 15 Apr 2021 12:35:44 +0200 Message-Id: <20210415103544.6791-8-osalvador@suse.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20210415103544.6791-1-osalvador@suse.de> References: <20210415103544.6791-1-osalvador@suse.de> MIME-Version: 1.0 X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 10EA480192D4 X-Stat-Signature: 59dod6irqb77euj1sma5oj53zk7z917k Received-SPF: none (suse.de>: No applicable sender policy available) receiver=imf08; identity=mailfrom; envelope-from=""; helo=mx2.suse.de; client-ip=195.135.220.15 X-HE-DKIM-Result: none/none X-HE-Tag: 1618482940-412707 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: pfn_range_valid_contig() bails out when it finds an in-use page or a hugetlb page, among other things. We can drop the in-use page check since __alloc_contig_pages can migrate away those pages, and the hugetlb page check can go too since isolate_migratepages_range is now capable of dealing with hugetlb pages. Either way, those checks are racy so let the end function handle it when the time comes. Signed-off-by: Oscar Salvador Suggested-by: David Hildenbrand Reviewed-by: David Hildenbrand Acked-by: Mike Kravetz Acked-by: Michal Hocko --- mm/page_alloc.c | 6 ------ 1 file changed, 6 deletions(-) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index b5a94de3cdde..c5338e912ace 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -8901,12 +8901,6 @@ static bool pfn_range_valid_contig(struct zone *z, unsigned long start_pfn, if (PageReserved(page)) return false; - - if (page_count(page) > 0) - return false; - - if (PageHuge(page)) - return false; } return true; }