From patchwork Tue Jan 10 13:36:22 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Baolin Wang X-Patchwork-Id: 41471 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:4e01:0:0:0:0:0 with SMTP id p1csp2751873wrt; Tue, 10 Jan 2023 05:40:42 -0800 (PST) X-Google-Smtp-Source: AMrXdXvfxnH3QEck0z3Le24zWif8NKxiYUcVDy81kwclLxdRYc0DnGxS6bKkhuTDqChStDzVNq08 X-Received: by 2002:a17:906:d217:b0:7af:1139:de77 with SMTP id w23-20020a170906d21700b007af1139de77mr58207847ejz.4.1673358041864; Tue, 10 Jan 2023 05:40:41 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1673358041; cv=none; d=google.com; s=arc-20160816; b=dNhvXN5MGtm2WTnR2MKMBihSOCM6ApGvbE3PTm9VkgHKgAlZcWWc9xE4GSGmgrjdOs 0eGuk90C2jU2PtJHxxoVmo4NOvc971ljTYHg2Y94tyZ+RDOw83HDoVgboWTE++8Fou70 yVe4axHJzo0nKeO0Fo1RiKMzo3kKeuiVpQKBmnv810S6wcWJx18fOf7h1OHqcU14w1Av dP7i5aQ4I/nHKYbI4hupJ5HFjnGwiXm4XDt6kPSzJMqFUfeEsNadC5PdTCIlByFL63th ENf5E6kH781dkuCkMNaanouAm/I6WnVqq5+Og/Ipvp7hovZAiVYsPy7cqF7QDXiK9cLd LxzQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from; bh=aUz5wuXddfVU8PbRGdBJ86wOUc4sRQaM/iFEVaa7T9s=; b=yUJccwcVgZYbT0eXsPIINUsDqiv4n+bK1jafgEzSpe9ygswgUgmOUGVl/ckHKwmLqY LlqcA3RzmMi54+HRYI0kZi6KE5Ov+cS/MGLE2fyNENxf9N8PGKLwziivI2sG+K+5Kf/q vBG1ABTgiQQGzBcqLo1tnh8gn0kMcoG/aQgGWOQasBBZm4MYJFE324bciqPr+2Frc1u5 40uoCdU6SjyszBTMrhRfAKBZlrOe1wUNCdDd1gRLpwT4TfT/33PlkP+9mnQm2itgj4/k S8KaqwFX1AxsmEffaDfFezkt/6BDgY7mpr0ghFgqhq1R/LUnr6ZSgPtohrGASrInRm2k Op3w== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=alibaba.com Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id ds19-20020a170907725300b0073dd7598686si10332454ejc.270.2023.01.10.05.40.17; Tue, 10 Jan 2023 05:40:41 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=alibaba.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231534AbjAJNgp (ORCPT + 99 others); Tue, 10 Jan 2023 08:36:45 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32826 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232932AbjAJNgf (ORCPT ); Tue, 10 Jan 2023 08:36:35 -0500 Received: from out30-130.freemail.mail.aliyun.com (out30-130.freemail.mail.aliyun.com [115.124.30.130]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1B2ECBA4 for ; Tue, 10 Jan 2023 05:36:33 -0800 (PST) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R181e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018045192;MF=baolin.wang@linux.alibaba.com;NM=1;PH=DS;RN=4;SR=0;TI=SMTPD_---0VZJUhjw_1673357790; Received: from localhost(mailfrom:baolin.wang@linux.alibaba.com fp:SMTPD_---0VZJUhjw_1673357790) by smtp.aliyun-inc.com; Tue, 10 Jan 2023 21:36:30 +0800 From: Baolin Wang To: akpm@linux-foundation.org Cc: baolin.wang@linux.alibaba.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH 5/5] mm: compaction: Avoid fragmentation score calculation for empty zones Date: Tue, 10 Jan 2023 21:36:22 +0800 Message-Id: <100331ad9d274a9725e687b00d85d75d7e4a17c7.1673342761.git.baolin.wang@linux.alibaba.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: References: MIME-Version: 1.0 X-Spam-Status: No, score=-9.9 required=5.0 tests=BAYES_00, ENV_AND_HDR_SPF_MATCH,RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H2, SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,USER_IN_DEF_SPF_WL autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1754643081970610230?= X-GMAIL-MSGID: =?utf-8?q?1754643081970610230?= There is no need to calculate the fragmentation score for empty zones. Signed-off-by: Baolin Wang --- mm/compaction.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/mm/compaction.c b/mm/compaction.c index 0fd6c81a7809..b758b00a4885 100644 --- a/mm/compaction.c +++ b/mm/compaction.c @@ -2025,6 +2025,8 @@ static unsigned int fragmentation_score_node(pg_data_t *pgdat) struct zone *zone; zone = &pgdat->node_zones[zoneid]; + if (!populated_zone(zone)) + continue; score += fragmentation_score_zone_weighted(zone); }