From patchwork Wed Jan 29 22:16:13 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wei Yang X-Patchwork-Id: 11356957 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 31EFC13A4 for ; Wed, 29 Jan 2020 22:16:34 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 16E95214AF for ; Wed, 29 Jan 2020 22:16:34 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 16E95214AF 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 C49B86B02A8; Wed, 29 Jan 2020 17:16:32 -0500 (EST) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id BA7566B02A9; Wed, 29 Jan 2020 17:16:32 -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 A6F6E6B02AA; Wed, 29 Jan 2020 17:16:32 -0500 (EST) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0069.hostedemail.com [216.40.44.69]) by kanga.kvack.org (Postfix) with ESMTP id 905A46B02A8 for ; Wed, 29 Jan 2020 17:16:32 -0500 (EST) Received: from smtpin08.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 191F7181AC9CC for ; Wed, 29 Jan 2020 22:16:32 +0000 (UTC) X-FDA: 76432081824.08.ice63_1bdb046691963 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:134.134.136.100:@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:23,LUA_SUMMARY:none X-HE-Tag: ice63_1bdb046691963 X-Filterd-Recvd-Size: 2283 Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by imf40.hostedemail.com (Postfix) with ESMTP for ; Wed, 29 Jan 2020 22:16:31 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga105.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 29 Jan 2020 14:16:30 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,379,1574150400"; d="scan'208";a="261959914" Received: from richard.sh.intel.com (HELO localhost) ([10.239.159.54]) by fmsmga002.fm.intel.com with ESMTP; 29 Jan 2020 14:16:28 -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 v4 1/4] mm/migrate.c: no need to check for i > start in do_pages_move() Date: Thu, 30 Jan 2020 06:16:13 +0800 Message-Id: <20200129221616.25432-2-richardw.yang@linux.intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200129221616.25432-1-richardw.yang@linux.intel.com> References: <20200129221616.25432-1-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 430fdccc733e..4c2a21856717 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -1661,11 +1661,9 @@ static int do_pages_move(struct mm_struct *mm, nodemask_t task_nodes, err = do_move_pages_to_node(mm, &pagelist, current_node); if (err) 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: