From nobody Mon Jun 22 14:26:09 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B1A24C433EF for ; Tue, 22 Mar 2022 11:37:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234267AbiCVLjB (ORCPT ); Tue, 22 Mar 2022 07:39:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35804 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232890AbiCVLi6 (ORCPT ); Tue, 22 Mar 2022 07:38:58 -0400 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3D11B83007 for ; Tue, 22 Mar 2022 04:37:31 -0700 (PDT) Received: from dggpemm500023.china.huawei.com (unknown [172.30.72.56]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4KN8Z50YpqzfYqb; Tue, 22 Mar 2022 19:35:57 +0800 (CST) Received: from dggpemm500002.china.huawei.com (7.185.36.229) by dggpemm500023.china.huawei.com (7.185.36.83) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.21; Tue, 22 Mar 2022 19:37:29 +0800 Received: from localhost.localdomain (10.175.112.125) by dggpemm500002.china.huawei.com (7.185.36.229) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.21; Tue, 22 Mar 2022 19:37:29 +0800 From: Chen Wandun To: , , Subject: [PATCH] mm/page_alloc: simplify update of pgdat in wake_all_kswapds Date: Tue, 22 Mar 2022 19:56:35 +0800 Message-ID: <20220322115635.2708989-1-chenwandun@huawei.com> X-Mailer: git-send-email 2.18.0.huawei.25 MIME-Version: 1.0 X-Originating-IP: [10.175.112.125] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To dggpemm500002.china.huawei.com (7.185.36.229) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" There is no need to update last_pgdat for each zone, only update last_pgdat when iterating the first zone of a node. Signed-off-by: Chen Wandun --- mm/page_alloc.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index f648decfe39d..ea282630aedc 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -4674,9 +4674,10 @@ static void wake_all_kswapds(unsigned int order, gfp= _t gfp_mask, =20 for_each_zone_zonelist_nodemask(zone, z, ac->zonelist, highest_zoneidx, ac->nodemask) { - if (last_pgdat !=3D zone->zone_pgdat) + if (last_pgdat !=3D zone->zone_pgdat) { wakeup_kswapd(zone, gfp_mask, order, highest_zoneidx); - last_pgdat =3D zone->zone_pgdat; + last_pgdat =3D zone->zone_pgdat; + } } } =20 --=20 2.18.0.huawei.25