From patchwork Fri Aug 28 03:32:38 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wei Yang X-Patchwork-Id: 11742121 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 A3FFE722 for ; Fri, 28 Aug 2020 03:32:59 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 7B7EA2080C for ; Fri, 28 Aug 2020 03:32:59 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7B7EA2080C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.alibaba.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 229816B0003; Thu, 27 Aug 2020 23:32:57 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 18AA18E0003; Thu, 27 Aug 2020 23:32:57 -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 EF8A56B0006; Thu, 27 Aug 2020 23:32:56 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0087.hostedemail.com [216.40.44.87]) by kanga.kvack.org (Postfix) with ESMTP id D17658E0003 for ; Thu, 27 Aug 2020 23:32:56 -0400 (EDT) Received: from smtpin21.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 9FB68180AD804 for ; Fri, 28 Aug 2020 03:32:56 +0000 (UTC) X-FDA: 77198555952.21.mark01_4005eec27072 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin21.hostedemail.com (Postfix) with ESMTP id 74A6F180442C0 for ; Fri, 28 Aug 2020 03:32:56 +0000 (UTC) X-Spam-Summary: 1,0,0,acc7bd7542779309,d41d8cd98f00b204,richard.weiyang@linux.alibaba.com,,RULES_HIT:41:355:379:541:800:960:973:988:989:1260:1261:1311:1314:1345:1359:1437:1515:1534:1541:1711:1730:1747:1777:1792:2194:2199:2393:2559:2562:2902:3138:3139:3140:3141:3142:3352:3865:3866:3867:3870:4321:5007:6261:7903:9010:9012:10004:11026:11658:11914:12043:12296:12297:12438:12555:12895:13069:13146:13230:13311:13357:13894:14096:14181:14384:14721:21080:21092:21451:21627:21939:21990:30034:30054:30064:30065,0,RBL:115.124.30.131:@linux.alibaba.com:.lbl8.mailshell.net-64.201.201.201 62.20.2.100;04ygijwofxfmyeemjg4hy7ojf4796ocj83ac7ub7zs8j5t895kpsaqf7ku666s9.jnc637mi9s3mm8z1m8ppxobc6w7weae66bsnbh1y4mipz7dbyezctjj6zdshfnd.a-lbl8.mailshell.net-223.238.255.100,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:none,Custom_rules:0:0:0,LFtime:24,LUA_SUMMARY:none X-HE-Tag: mark01_4005eec27072 X-Filterd-Recvd-Size: 2306 Received: from out30-131.freemail.mail.aliyun.com (out30-131.freemail.mail.aliyun.com [115.124.30.131]) by imf35.hostedemail.com (Postfix) with ESMTP for ; Fri, 28 Aug 2020 03:32:55 +0000 (UTC) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R181e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01f04455;MF=richard.weiyang@linux.alibaba.com;NM=1;PH=DS;RN=6;SR=0;TI=SMTPD_---0U741Gbc_1598585571; Received: from localhost(mailfrom:richard.weiyang@linux.alibaba.com fp:SMTPD_---0U741Gbc_1598585571) by smtp.aliyun-inc.com(127.0.0.1); Fri, 28 Aug 2020 11:32:52 +0800 From: Wei Yang To: mike.kravetz@oracle.com, akpm@linux-foundation.org Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, bhe@redhat.com, Wei Yang Subject: [Patch v2 3/7] mm/hugetlb: use list_splice to merge two list at once Date: Fri, 28 Aug 2020 11:32:38 +0800 Message-Id: <20200828033242.8787-4-richard.weiyang@linux.alibaba.com> X-Mailer: git-send-email 2.20.1 (Apple Git-117) In-Reply-To: <20200828033242.8787-1-richard.weiyang@linux.alibaba.com> References: <20200828033242.8787-1-richard.weiyang@linux.alibaba.com> MIME-Version: 1.0 X-Rspamd-Queue-Id: 74A6F180442C0 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam02 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000067, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Instead of add allocated file_region one by one to region_cache, we could use list_splice to merge two list at once. Also we know the number of entries in the list, increase the number directly. Signed-off-by: Wei Yang Reviewed-by: Baoquan He Reviewed-by: Mike Kravetz --- mm/hugetlb.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/mm/hugetlb.c b/mm/hugetlb.c index f325839be617..cbe67428bf99 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -441,11 +441,8 @@ static int allocate_file_region_entries(struct resv_map *resv, spin_lock(&resv->lock); - list_for_each_entry_safe(rg, trg, &allocated_regions, link) { - list_del(&rg->link); - list_add(&rg->link, &resv->region_cache); - resv->region_cache_count++; - } + list_splice(&allocated_regions, &resv->region_cache); + resv->region_cache_count += to_allocate; } return 0;