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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id F1052C433F5 for ; Mon, 18 Apr 2022 15:14:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343506AbiDRPRA (ORCPT ); Mon, 18 Apr 2022 11:17:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54498 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243746AbiDRPPn (ORCPT ); Mon, 18 Apr 2022 11:15:43 -0400 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2C9A0B918F for ; Mon, 18 Apr 2022 07:12:31 -0700 (PDT) Received: from canpemm500002.china.huawei.com (unknown [172.30.72.56]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4KhplQ4z6qzfYx6; Mon, 18 Apr 2022 22:11:46 +0800 (CST) Received: from huawei.com (10.175.124.27) by canpemm500002.china.huawei.com (7.192.104.244) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Mon, 18 Apr 2022 22:12:29 +0800 From: Miaohe Lin To: CC: , , , , , Subject: [PATCH 05/12] mm: compaction: clean up comment about suitable migration target recheck Date: Mon, 18 Apr 2022 22:12:46 +0800 Message-ID: <20220418141253.24298-6-linmiaohe@huawei.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20220418141253.24298-1-linmiaohe@huawei.com> References: <20220418141253.24298-1-linmiaohe@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-Originating-IP: [10.175.124.27] X-ClientProxiedBy: dggems703-chm.china.huawei.com (10.3.19.180) To canpemm500002.china.huawei.com (7.192.104.244) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org checked_pageblock is already removed and suitable_migration_target is not rechecked under the zone lock since commit f8224aa5a0a4 ("mm, compaction: do not recheck suitable_migration_target under lock"). Correct the comment accordingly. Signed-off-by: Miaohe Lin --- mm/compaction.c | 8 +------- 1 file changed, 1 insertion(+), 7 deletions(-) diff --git a/mm/compaction.c b/mm/compaction.c index e839b26fb3d8..97821b7d7a4f 100644 --- a/mm/compaction.c +++ b/mm/compaction.c @@ -599,13 +599,7 @@ static unsigned long isolate_freepages_block(struct compact_control *cc, if (!PageBuddy(page)) goto isolate_fail; - /* - * If we already hold the lock, we can skip some rechecking. - * Note that if we hold the lock now, checked_pageblock was - * already set in some previous iteration (or strict is true), - * so it is correct to skip the suitable migration target - * recheck as well. - */ + /* If we already hold the lock, we can skip some rechecking. */ if (!locked) { locked = compact_lock_irqsave(&cc->zone->lock, &flags, cc); -- 2.23.0