From patchwork Sun Apr 12 19:48:58 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Rapoport X-Patchwork-Id: 11484767 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C3B0E112C for ; Sun, 12 Apr 2020 19:54:15 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 908122137B for ; Sun, 12 Apr 2020 19:54:15 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="G2zxEyan" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 908122137B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id C63B98E00E9; Sun, 12 Apr 2020 15:54:14 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id C3A828E00D0; Sun, 12 Apr 2020 15:54:14 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id B29558E00E9; Sun, 12 Apr 2020 15:54:14 -0400 (EDT) X-Original-To: linux-mm@kvack.org 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 985FD8E00D0 for ; Sun, 12 Apr 2020 15:54:14 -0400 (EDT) Received: from smtpin23.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 52DB2824556B for ; Sun, 12 Apr 2020 19:54:14 +0000 (UTC) X-FDA: 76700254428.23.coil21_24f37f3617212 X-Spam-Summary: 2,0,0,855cb2af9d1a515d,d41d8cd98f00b204,rppt@kernel.org,,RULES_HIT:41:69:355:379:541:800:960:973:988:989:1260:1311:1314:1345:1359:1437:1515:1534:1541:1711:1730:1747:1777:1792:2393:2559:2562:3138:3139:3140:3141:3142:3352:3865:3867:3868:3870:4250:5007:6119:6261:6653:6742:6743:7576:7875:7903:9592:10004:11026:11658:11914:12043:12114:12296:12297:12438:12517:12519:12555:12679:12895:13069:13161:13229:13311:13357:13894:13972:14181:14384:14394:14721:21080:21324:21627:21990:30054,0,RBL:198.145.29.99:@kernel.org:.lbl8.mailshell.net-64.100.201.201 62.2.0.100,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:24,LUA_SUMMARY:none X-HE-Tag: coil21_24f37f3617212 X-Filterd-Recvd-Size: 4966 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf07.hostedemail.com (Postfix) with ESMTP for ; Sun, 12 Apr 2020 19:54:13 +0000 (UTC) Received: from aquarius.haifa.ibm.com (nesher1.haifa.il.ibm.com [195.110.40.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 0707B214AF; Sun, 12 Apr 2020 19:53:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586721253; bh=myYkWprg+WWiUHcdd6ZwCH3br4gnq7CtJsGPm4IVpVQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=G2zxEyanO6auX9PlgDUIwafXaMtYsug93RcjOLLHmt/Mx4m5WfSWEfSMjB/3vOco8 HD6WsW6NQOCBPpWxm7mQPG5SxNsta85Ooh54ZaibuDr4VLhx9Kf6+MK770FacD1L+U R99Kq+yNI2/XUURnheTplxnGlHscZKCl6IyGM+yo= From: Mike Rapoport To: linux-kernel@vger.kernel.org Cc: Andrew Morton , Baoquan He , Brian Cain , Catalin Marinas , "David S. Miller" , Geert Uytterhoeven , Greentime Hu , Greg Ungerer , Guan Xuetao , Guo Ren , Heiko Carstens , Helge Deller , Hoan Tran , "James E.J. Bottomley" , Jonathan Corbet , Ley Foon Tan , Mark Salter , Matt Turner , Max Filippov , Michael Ellerman , Michal Hocko , Michal Simek , Mike Rapoport , Nick Hu , Paul Walmsley , Richard Weinberger , Rich Felker , Russell King , Stafford Horne , Thomas Bogendoerfer , Tony Luck , Vineet Gupta , x86@kernel.org, Yoshinori Sato , linux-alpha@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-c6x-dev@linux-c6x.org, linux-csky@vger.kernel.org, linux-doc@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-mm@kvack.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-um@lists.infradead.org, linux-xtensa@linux-xtensa.org, openrisc@lists.librecores.org, sparclinux@vger.kernel.org, uclinux-h8-devel@lists.sourceforge.jp, Mike Rapoport Subject: [PATCH 20/21] mm: simplify find_min_pfn_with_active_regions() Date: Sun, 12 Apr 2020 22:48:58 +0300 Message-Id: <20200412194859.12663-21-rppt@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200412194859.12663-1-rppt@kernel.org> References: <20200412194859.12663-1-rppt@kernel.org> MIME-Version: 1.0 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: From: Mike Rapoport The find_min_pfn_with_active_regions() calls find_min_pfn_for_node() with nid parameter set to MAX_NUMNODES. This makes the find_min_pfn_for_node() traverse all memblock memory regions although the first PFN in the system can be easily found with memblock_start_of_DRAM(). Use memblock_start_of_DRAM() in find_min_pfn_with_active_regions() and drop now unused find_min_pfn_for_node(). Signed-off-by: Mike Rapoport --- mm/page_alloc.c | 20 +------------------- 1 file changed, 1 insertion(+), 19 deletions(-) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 9af27ee784c7..e83f28d6074a 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -7071,24 +7071,6 @@ unsigned long __init node_map_pfn_alignment(void) return ~accl_mask + 1; } -/* Find the lowest pfn for a node */ -static unsigned long __init find_min_pfn_for_node(int nid) -{ - unsigned long min_pfn = ULONG_MAX; - unsigned long start_pfn; - int i; - - for_each_mem_pfn_range(i, nid, &start_pfn, NULL, NULL) - min_pfn = min(min_pfn, start_pfn); - - if (min_pfn == ULONG_MAX) { - pr_warn("Could not find start_pfn for node %d\n", nid); - return 0; - } - - return min_pfn; -} - /** * find_min_pfn_with_active_regions - Find the minimum PFN registered * @@ -7097,7 +7079,7 @@ static unsigned long __init find_min_pfn_for_node(int nid) */ unsigned long __init find_min_pfn_with_active_regions(void) { - return find_min_pfn_for_node(MAX_NUMNODES); + return PHYS_PFN(memblock_start_of_DRAM()); } /*