From patchwork Fri Aug 28 03:32:42 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wei Yang X-Patchwork-Id: 11742129 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 E885513A4 for ; Fri, 28 Aug 2020 03:33:08 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id C114A2080C for ; Fri, 28 Aug 2020 03:33:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C114A2080C 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 6EA818E0009; Thu, 27 Aug 2020 23:33:02 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 6490C8E0003; Thu, 27 Aug 2020 23:33:02 -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 474F18E0009; Thu, 27 Aug 2020 23:33:02 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0214.hostedemail.com [216.40.44.214]) by kanga.kvack.org (Postfix) with ESMTP id 2389D8E0003 for ; Thu, 27 Aug 2020 23:33:02 -0400 (EDT) Received: from smtpin08.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id E31B8181AEF1A for ; Fri, 28 Aug 2020 03:33:01 +0000 (UTC) X-FDA: 77198556162.08.burn81_4904fb827072 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin08.hostedemail.com (Postfix) with ESMTP id BA8231819E76B for ; Fri, 28 Aug 2020 03:33:01 +0000 (UTC) X-Spam-Summary: 1,0,0,08b2e0b3c4dc2579,d41d8cd98f00b204,richard.weiyang@linux.alibaba.com,,RULES_HIT:41:355:379:541:800:960:973:988:989:1260:1261:1311:1314:1345:1359:1437:1515:1534:1540:1711:1714:1730:1747:1777:1792:2393:2559:2562:3138:3139:3140:3141:3142:3350:3867:3871:4321:5007:6261:7903:10004:11026:11473:11658:11914:12043:12296:12297:12438:12555:12895:12986:13069:13255:13311:13357:13894:14181:14384:14721:21080:21451:21627:30054:30064:30065,0,RBL:115.124.30.130:@linux.alibaba.com:.lbl8.mailshell.net-64.201.201.201 62.20.2.100;04yfmcgre6aoxw3n1incyzp3xcwegoc4bswa55i1mwbnjc6ji1gst68rgasns4x.dwnopnfzp477wm9j9xxit8ttek84758yje35uc87afxrtwxigjmpg3egmuk9j6r.g-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: burn81_4904fb827072 X-Filterd-Recvd-Size: 2250 Received: from out30-130.freemail.mail.aliyun.com (out30-130.freemail.mail.aliyun.com [115.124.30.130]) by imf13.hostedemail.com (Postfix) with ESMTP for ; Fri, 28 Aug 2020 03:33:00 +0000 (UTC) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R161e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04407;MF=richard.weiyang@linux.alibaba.com;NM=1;PH=DS;RN=6;SR=0;TI=SMTPD_---0U736V23_1598585574; Received: from localhost(mailfrom:richard.weiyang@linux.alibaba.com fp:SMTPD_---0U736V23_1598585574) by smtp.aliyun-inc.com(127.0.0.1); Fri, 28 Aug 2020 11:32:54 +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 7/7] mm/hugetlb: narrow the hugetlb_lock protection area during preparing huge page Date: Fri, 28 Aug 2020 11:32:42 +0800 Message-Id: <20200828033242.8787-8-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: BA8231819E76B X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam03 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000003, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: set_hugetlb_cgroup_[rsvd] just manipulate page local data, which is not necessary to be protected by hugetlb_lock. Let's take this out. Signed-off-by: Wei Yang Reviewed-by: Baoquan He Reviewed-by: Mike Kravetz --- mm/hugetlb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 6ad365dd1e96..ae840dc09197 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -1492,9 +1492,9 @@ static void prep_new_huge_page(struct hstate *h, struct page *page, int nid) { INIT_LIST_HEAD(&page->lru); set_compound_page_dtor(page, HUGETLB_PAGE_DTOR); - spin_lock(&hugetlb_lock); set_hugetlb_cgroup(page, NULL); set_hugetlb_cgroup_rsvd(page, NULL); + spin_lock(&hugetlb_lock); h->nr_huge_pages++; h->nr_huge_pages_node[nid]++; spin_unlock(&hugetlb_lock);