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 36F1DC433F5 for ; Mon, 18 Apr 2022 15:14:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241396AbiDRPRE (ORCPT ); Mon, 18 Apr 2022 11:17:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54330 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243492AbiDRPPn (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 BEAC3B919C for ; Mon, 18 Apr 2022 07:12:32 -0700 (PDT) Received: from canpemm500002.china.huawei.com (unknown [172.30.72.54]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4KhplS13JczfYy1; Mon, 18 Apr 2022 22:11:48 +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 22:12:30 +0800 From: Miaohe Lin To: CC: , , , , , Subject: [PATCH 08/12] mm: compaction: clean up comment about async compaction in isolate_migratepages Date: Mon, 18 Apr 2022 22:12:49 +0800 Message-ID: <20220418141253.24298-9-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 Since commit 282722b0d258 ("mm, compaction: restrict async compaction to pageblocks of same migratetype"), async direct compaction is restricted to scan the pageblocks of same migratetype. Correct the comment accordingly. Signed-off-by: Miaohe Lin --- mm/compaction.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/mm/compaction.c b/mm/compaction.c index 55013a2af817..562f274b2c51 100644 --- a/mm/compaction.c +++ b/mm/compaction.c @@ -1941,12 +1941,12 @@ static isolate_migrate_t isolate_migratepages(struct compact_control *cc) continue; /* - * For async compaction, also only scan in MOVABLE blocks - * without huge pages. Async compaction is optimistic to see - * if the minimum amount of work satisfies the allocation. - * The cached PFN is updated as it's possible that all - * remaining blocks between source and target are unsuitable - * and the compaction scanners fail to meet. + * For async direct compaction, only scan the pageblocks of the + * same migratetype without huge pages. Async direct compaction + * is optimistic to see if the minimum amount of work satisfies + * the allocation. The cached PFN is updated as it's possible + * that all remaining blocks between source and target are + * unsuitable and the compaction scanners fail to meet. */ if (!suitable_migration_source(cc, page)) { update_cached_migrate(cc, block_end_pfn); -- 2.23.0