From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D630AC433E6 for ; Tue, 1 Sep 2020 01:46:59 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id A54432098B for ; Tue, 1 Sep 2020 01:46:59 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A54432098B 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 CF3A2900003; Mon, 31 Aug 2020 21:46:52 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id CCCFF8E0005; Mon, 31 Aug 2020 21:46:52 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id B1EBA900003; Mon, 31 Aug 2020 21:46:52 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0092.hostedemail.com [216.40.44.92]) by kanga.kvack.org (Postfix) with ESMTP id 922CA8E0006 for ; Mon, 31 Aug 2020 21:46:52 -0400 (EDT) Received: from smtpin08.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 5897A824556B for ; Tue, 1 Sep 2020 01:46:52 +0000 (UTC) X-FDA: 77212803864.08.jail88_5702b9b27094 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin08.hostedemail.com (Postfix) with ESMTP id 2ECB31819E76B for ; Tue, 1 Sep 2020 01:46:52 +0000 (UTC) X-HE-Tag: jail88_5702b9b27094 X-Filterd-Recvd-Size: 2253 Received: from out30-131.freemail.mail.aliyun.com (out30-131.freemail.mail.aliyun.com [115.124.30.131]) by imf09.hostedemail.com (Postfix) with ESMTP for ; Tue, 1 Sep 2020 01:46:50 +0000 (UTC) X-Alimail-AntiSpam:AC=PASS;BC=-1|-1;BR=01201311R191e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e01358;MF=richard.weiyang@linux.alibaba.com;NM=1;PH=DS;RN=6;SR=0;TI=SMTPD_---0U7Txib9_1598924805; Received: from localhost(mailfrom:richard.weiyang@linux.alibaba.com fp:SMTPD_---0U7Txib9_1598924805) by smtp.aliyun-inc.com(127.0.0.1); Tue, 01 Sep 2020 09:46:46 +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 v4 6/7] mm/hugetlb: narrow the hugetlb_lock protection area during preparing huge page Date: Tue, 1 Sep 2020 09:46:35 +0800 Message-Id: <20200901014636.29737-7-richard.weiyang@linux.alibaba.com> X-Mailer: git-send-email 2.20.1 (Apple Git-117) In-Reply-To: <20200901014636.29737-1-richard.weiyang@linux.alibaba.com> References: <20200901014636.29737-1-richard.weiyang@linux.alibaba.com> MIME-Version: 1.0 X-Rspamd-Queue-Id: 2ECB31819E76B X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam02 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000489, 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 c9b292e664c4..7b3357c1dcec 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -1493,9 +1493,9 @@ static void prep_new_huge_page(struct hstate *h, st= ruct 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); --=20 2.20.1 (Apple Git-117)