From patchwork Fri Aug 7 09:12:49 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wei Yang X-Patchwork-Id: 11705209 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 1493B722 for ; Fri, 7 Aug 2020 09:13:47 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id DB4CE22C9F for ; Fri, 7 Aug 2020 09:13:46 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DB4CE22C9F 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 20BC48D009C; Fri, 7 Aug 2020 05:13:37 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 1EC968D0097; Fri, 7 Aug 2020 05:13:37 -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 0AA468D009C; Fri, 7 Aug 2020 05:13:36 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0106.hostedemail.com [216.40.44.106]) by kanga.kvack.org (Postfix) with ESMTP id DFA538D0097 for ; Fri, 7 Aug 2020 05:13:36 -0400 (EDT) Received: from smtpin06.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 92144180AD802 for ; Fri, 7 Aug 2020 09:13:36 +0000 (UTC) X-FDA: 77123209632.06.wire34_1612d3226fbf Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin06.hostedemail.com (Postfix) with ESMTP id 3BC11100994A7 for ; Fri, 7 Aug 2020 09:13:36 +0000 (UTC) X-Spam-Summary: 1,0,0,80911f6b816e8da0,d41d8cd98f00b204,richard.weiyang@linux.alibaba.com,,RULES_HIT:41:69:355:379:541:960:966:973:988:989:1260:1261:1311:1314:1345:1359:1437:1515:1534:1541:1711:1730:1747:1777:1792:2196:2199:2393:2559:2562:2898:3138:3139:3140:3141:3142:3352:3865:3866:3868:3870:4321:4385:5007:6261:9010:10004:11026:11658:11914:12043:12297:12438:12555:12895:13069:13255:13311:13357:13894:14181:14384:14394:14721:21080:21627:21990:30054:30065:30070,0,RBL:115.124.30.42:@linux.alibaba.com:.lbl8.mailshell.net-62.20.2.100 64.201.201.201;04yf9gcsd3ei19wuyxiqmfh9kdezcopyh66zzd4b7k9yzjtkmgr8k9pekbonkxu.xkgieno7dcjianomx7mos661ifducu8bmdat8tb7aq1bnmsp3assgds5gw4w7e4.1-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:neutral,Custom_rules:0:0:0,LFtime:23,LUA_SUMMARY:none X-HE-Tag: wire34_1612d3226fbf X-Filterd-Recvd-Size: 2801 Received: from out30-42.freemail.mail.aliyun.com (out30-42.freemail.mail.aliyun.com [115.124.30.42]) by imf28.hostedemail.com (Postfix) with ESMTP for ; Fri, 7 Aug 2020 09:13:34 +0000 (UTC) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R311e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e07488;MF=richard.weiyang@linux.alibaba.com;NM=1;PH=DS;RN=5;SR=0;TI=SMTPD_---0U5.6f7D_1596791599; Received: from localhost(mailfrom:richard.weiyang@linux.alibaba.com fp:SMTPD_---0U5.6f7D_1596791599) by smtp.aliyun-inc.com(127.0.0.1); Fri, 07 Aug 2020 17:13:20 +0800 From: Wei Yang To: mike.kravetz@oracle.com, akpm@linux-foundation.org Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Wei Yang Subject: [PATCH 08/10] mm/hugetlb: return non-isolated page in the loop instead of break and check Date: Fri, 7 Aug 2020 17:12:49 +0800 Message-Id: <20200807091251.12129-9-richard.weiyang@linux.alibaba.com> X-Mailer: git-send-email 2.20.1 (Apple Git-117) In-Reply-To: <20200807091251.12129-1-richard.weiyang@linux.alibaba.com> References: <20200807091251.12129-1-richard.weiyang@linux.alibaba.com> MIME-Version: 1.0 X-Rspamd-Queue-Id: 3BC11100994A7 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam03 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: Function dequeue_huge_page_node_exact() iterates the free list and return the first non-isolated one. Instead of break and check the loop variant, we could return in the loop directly. This could reduce some redundant check. Signed-off-by: Wei Yang Reviewed-by: Mike Kravetz --- mm/hugetlb.c | 26 ++++++++++++-------------- 1 file changed, 12 insertions(+), 14 deletions(-) diff --git a/mm/hugetlb.c b/mm/hugetlb.c index b8e844911b5a..9473eb6800e9 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -1035,20 +1035,18 @@ static struct page *dequeue_huge_page_node_exact(struct hstate *h, int nid) { struct page *page; - list_for_each_entry(page, &h->hugepage_freelists[nid], lru) - if (!PageHWPoison(page)) - break; - /* - * if 'non-isolated free hugepage' not found on the list, - * the allocation fails. - */ - if (&h->hugepage_freelists[nid] == &page->lru) - return NULL; - list_move(&page->lru, &h->hugepage_activelist); - set_page_refcounted(page); - h->free_huge_pages--; - h->free_huge_pages_node[nid]--; - return page; + list_for_each_entry(page, &h->hugepage_freelists[nid], lru) { + if (PageHWPoison(page)) + continue; + + list_move(&page->lru, &h->hugepage_activelist); + set_page_refcounted(page); + h->free_huge_pages--; + h->free_huge_pages_node[nid]--; + return page; + } + + return NULL; } static struct page *dequeue_huge_page_nodemask(struct hstate *h, gfp_t gfp_mask, int nid,