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=-3.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no 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 95318C43331 for ; Thu, 2 Apr 2020 04:10:05 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 4F76920784 for ; Thu, 2 Apr 2020 04:10:05 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="W3IOrE08" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4F76920784 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 01F678E0078; Thu, 2 Apr 2020 00:10:05 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id EEAAE8E000D; Thu, 2 Apr 2020 00:10:04 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id DDDD28E0078; Thu, 2 Apr 2020 00:10:04 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0075.hostedemail.com [216.40.44.75]) by kanga.kvack.org (Postfix) with ESMTP id C19258E000D for ; Thu, 2 Apr 2020 00:10:04 -0400 (EDT) Received: from smtpin04.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 91355180AD807 for ; Thu, 2 Apr 2020 04:10:04 +0000 (UTC) X-FDA: 76661587128.04.level67_57f0839784b2b X-HE-Tag: level67_57f0839784b2b X-Filterd-Recvd-Size: 2442 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf24.hostedemail.com (Postfix) with ESMTP for ; Thu, 2 Apr 2020 04:10:04 +0000 (UTC) Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 3ABED2074D; Thu, 2 Apr 2020 04:10:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585800603; bh=LKJK0ArsT3WY1hMVhLWuH3fyUIwaG3bpEWMSWPYyF/o=; h=Date:From:To:Subject:In-Reply-To:From; b=W3IOrE08wL5/rOYx9wl3glfruGoqVhVP/PAqIa50yzBJQQ/2+bCkAoTJGzF+ipnEr TRtsAppUN7jA13pY0kcJd34KY3ekG0+f8kQK8DI3kmDfyxctPdT+T5a1MMg3/JROUK bo3G7BcQNfX+e3Yz3AQdYYqZu4r9Nq+OXvhiNwI0= Date: Wed, 01 Apr 2020 21:10:02 -0700 From: Andrew Morton To: akpm@linux-foundation.org, david@redhat.com, linux-mm@kvack.org, mhocko@suse.com, mm-commits@vger.kernel.org, rientjes@google.com, torvalds@linux-foundation.org, yang.shi@linux.alibaba.com Subject: [patch 120/155] mm: vmpressure: use mem_cgroup_is_root API Message-ID: <20200402041002.qYammk-U7%akpm@linux-foundation.org> In-Reply-To: <20200401210155.09e3b9742e1c6e732f5a7250@linux-foundation.org> User-Agent: s-nail v14.8.16 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: From: Yang Shi Subject: mm: vmpressure: use mem_cgroup_is_root API Use mem_cgroup_is_root() API to check if memcg is root memcg instead of open coding. Link: http://lkml.kernel.org/r/1581398649-125989-2-git-send-email-yang.shi@linux.alibaba.com Signed-off-by: Yang Shi Reviewed-by: Andrew Morton Reviewed-by: David Hildenbrand Acked-by: Michal Hocko Acked-by: David Rientjes Signed-off-by: Andrew Morton --- mm/vmpressure.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/mm/vmpressure.c~mm-vmpressure-use-mem_cgroup_is_root-api +++ a/mm/vmpressure.c @@ -280,7 +280,7 @@ void vmpressure(gfp_t gfp, struct mem_cg enum vmpressure_levels level; /* For now, no users for root-level efficiency */ - if (!memcg || memcg == root_mem_cgroup) + if (!memcg || mem_cgroup_is_root(memcg)) return; spin_lock(&vmpr->sr_lock); _