From patchwork Fri Nov 13 14:10:48 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hui Su X-Patchwork-Id: 11903563 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 95BC8697 for ; Fri, 13 Nov 2020 14:11:05 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 3FE4922240 for ; Fri, 13 Nov 2020 14:11:05 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b="TrwUQ6hz" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3FE4922240 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=163.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 3E1CF6B005C; Fri, 13 Nov 2020 09:11:04 -0500 (EST) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 392FD6B0068; Fri, 13 Nov 2020 09:11:04 -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 2D0826B006C; Fri, 13 Nov 2020 09:11:04 -0500 (EST) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0251.hostedemail.com [216.40.44.251]) by kanga.kvack.org (Postfix) with ESMTP id 00FC66B005C for ; Fri, 13 Nov 2020 09:11:03 -0500 (EST) Received: from smtpin01.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 96623180AD802 for ; Fri, 13 Nov 2020 14:11:03 +0000 (UTC) X-FDA: 77479581606.01.owl42_331688f2730f Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin01.hostedemail.com (Postfix) with ESMTP id 73E221004BE27 for ; Fri, 13 Nov 2020 14:11:03 +0000 (UTC) X-Spam-Summary: 50,0,0,54bb5c604bdc198e,d41d8cd98f00b204,sh_def@163.com,,RULES_HIT:41:355:379:582:800:960:973:988:989:1152:1260:1277:1312:1313:1314:1345:1437:1516:1518:1519:1534:1540:1593:1594:1595:1596:1711:1714:1730:1747:1777:1792:2393:2559:2562:3138:3139:3140:3141:3142:3350:3865:3868:3870:3872:4321:5007:6261:6653:10004:10400:11026:11334:11658:11914:12043:12114:12296:12297:12438:12555:12895:13069:13311:13357:13439:13895:14096:14097:14181:14394:14721:21080:21627:21990:30054,0,RBL:220.181.12.11:@163.com:.lbl8.mailshell.net-62.50.2.100 66.100.201.100;04ygw6ier8uqz3scm1ajfxyuxojzuyp989rh9oct6m1dwjkga56cf7kzwokas8t.qge81zgyqbpaf1pbsu3pjugq6f8kaqbx8hc96k5za4icipqcxox34nkewg8zc1m.n-lbl8.mailshell.net-223.238.255.100;220.181.12.11-irl.urbl.hostedemail.com-127.0.0.150,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:69,LUA_SUMMARY:none X-HE-Tag: owl42_331688f2730f X-Filterd-Recvd-Size: 2364 Received: from m12-11.163.com (m12-11.163.com [220.181.12.11]) by imf29.hostedemail.com (Postfix) with ESMTP for ; Fri, 13 Nov 2020 14:10:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=Date:From:Subject:Message-ID:MIME-Version; bh=BPvet 3Bokc0CBtDtXhqknCUn3oJg8vZczH3XlVV+zN8=; b=TrwUQ6hzN1xsUAbWBf6Kj dwmNw/ro1i7kxnvtlTDzpid+RETNrODJZhjsFXREfYah5fzjZ8eMw5rB1EnF4s9K FzeUQIOUQEIy/llma5zJjQ6eHbaWgCncRi/6GIY8f6bQCtDqtNSnULp735w81zF3 RftE1X2X/sn899oikWGa1o= Received: from localhost (unknown [101.86.208.122]) by smtp7 (Coremail) with SMTP id C8CowAAXm3Dok65fL9JXBg--.38573S2; Fri, 13 Nov 2020 22:10:48 +0800 (CST) Date: Fri, 13 Nov 2020 22:10:48 +0800 From: Hui Su To: akpm@linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: sh_def@163.com Subject: [PATCH] mm/page_counter: use page_counter_read in page_counter_set_max Message-ID: <20201113141048.GA178922@rlk> MIME-Version: 1.0 Content-Disposition: inline X-CM-TRANSID: C8CowAAXm3Dok65fL9JXBg--.38573S2 X-Coremail-Antispam: 1Uf129KBjvdXoWruw1xAr1xCrWfZFWfZFWxCrg_yoW3twc_Aw 1kXF1DJrsIga47Ar1Ut3W3Xrn5t3s29rWkXryxtFyYy3WYqrySqF18AF13Jr4DJr4rXrs8 Gw1Fva4xur9xtjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7IUU1xRDUUUUU== X-Originating-IP: [101.86.208.122] X-CM-SenderInfo: xvkbvvri6rljoofrz/1tbiIAnbX10TCJdzZwAAso X-Bogosity: Ham, tests=bogofilter, spamicity=0.001980, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: use page_counter_read() in page_counter_set_max(). Signed-off-by: Hui Su Reviewed-by: Pankaj Gupta --- mm/page_counter.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/mm/page_counter.c b/mm/page_counter.c index b24a60b28bb0..c6860f51b6c6 100644 --- a/mm/page_counter.c +++ b/mm/page_counter.c @@ -183,14 +183,14 @@ int page_counter_set_max(struct page_counter *counter, unsigned long nr_pages) * the limit, so if it sees the old limit, we see the * modified counter and retry. */ - usage = atomic_long_read(&counter->usage); + usage = page_counter_read(counter); if (usage > nr_pages) return -EBUSY; old = xchg(&counter->max, nr_pages); - if (atomic_long_read(&counter->usage) <= usage) + if (page_counter_read(counter) <= usage) return 0; counter->max = old;