From patchwork Fri Feb 14 00:30:14 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wei Yang X-Patchwork-Id: 11381477 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 69517921 for ; Fri, 14 Feb 2020 00:30:20 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 4CD6F218AC for ; Fri, 14 Feb 2020 00:30:20 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4CD6F218AC Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 5D0AB6B05BD; Thu, 13 Feb 2020 19:30:19 -0500 (EST) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 5816C6B05BF; Thu, 13 Feb 2020 19:30:19 -0500 (EST) 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 4E50E6B05C0; Thu, 13 Feb 2020 19:30:19 -0500 (EST) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0180.hostedemail.com [216.40.44.180]) by kanga.kvack.org (Postfix) with ESMTP id 3A0A86B05BD for ; Thu, 13 Feb 2020 19:30:19 -0500 (EST) Received: from smtpin23.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id EDAAF8248076 for ; Fri, 14 Feb 2020 00:30:18 +0000 (UTC) X-FDA: 76486850916.23.fifth09_1fc4ae8112c28 X-Spam-Summary: 1,0,0,,d41d8cd98f00b204,richardw.yang@linux.intel.com,:akpm@linux-foundation.org::linux-kernel@vger.kernel.org:mhocko@suse.com:yang.shi@linux.alibaba.com:rientjes@google.com:david@redhat.com:richardw.yang@linux.intel.com,RULES_HIT:30046:30054:30070,0,RBL:192.55.52.151:@linux.intel.com:.lbl8.mailshell.net-62.18.0.100 64.95.201.95,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fn,MSBL:0,DNSBL:none,Custom_rules:0:0:0,LFtime:25,LUA_SUMMARY:none X-HE-Tag: fifth09_1fc4ae8112c28 X-Filterd-Recvd-Size: 2243 Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by imf03.hostedemail.com (Postfix) with ESMTP for ; Fri, 14 Feb 2020 00:30:18 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga107.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 13 Feb 2020 16:30:15 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,438,1574150400"; d="scan'208";a="227246059" Received: from richard.sh.intel.com (HELO localhost) ([10.239.159.54]) by fmsmga007.fm.intel.com with ESMTP; 13 Feb 2020 16:30:14 -0800 From: Wei Yang To: akpm@linux-foundation.org Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, mhocko@suse.com, yang.shi@linux.alibaba.com, rientjes@google.com, david@redhat.com, Wei Yang Subject: [Patch v5 1/4] mm/migrate.c: no need to check for i > start in do_pages_move() Date: Fri, 14 Feb 2020 08:30:14 +0800 Message-Id: <20200214003017.25558-2-richardw.yang@linux.intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200214003017.25558-1-richardw.yang@linux.intel.com> References: <20200214003017.25558-1-richardw.yang@linux.intel.com> 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: At this point, we always have i >= start. If i == start, store_status() will return 0. So we can drop the check for i > start. [david@redhat.com rephrase changelog] Signed-off-by: Wei Yang Acked-by: Michal Hocko Reviewed-by: David Hildenbrand --- mm/migrate.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/mm/migrate.c b/mm/migrate.c index b1092876e537..6d466de4d1d0 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -1675,11 +1675,9 @@ static int do_pages_move(struct mm_struct *mm, nodemask_t task_nodes, err += nr_pages - i - 1; goto out; } - if (i > start) { - err = store_status(status, start, current_node, i - start); - if (err) - goto out; - } + err = store_status(status, start, current_node, i - start); + if (err) + goto out; current_node = NUMA_NO_NODE; } out_flush: