From nobody Wed Apr 8 07:44:03 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 AD20BC28D13 for ; Tue, 23 Aug 2022 03:04:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239872AbiHWDEn (ORCPT ); Mon, 22 Aug 2022 23:04:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56498 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239857AbiHWDEF (ORCPT ); Mon, 22 Aug 2022 23:04:05 -0400 Received: from szxga08-in.huawei.com (szxga08-in.huawei.com [45.249.212.255]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2E3BF5C9F5 for ; Mon, 22 Aug 2022 20:02:53 -0700 (PDT) Received: from canpemm500002.china.huawei.com (unknown [172.30.72.53]) by szxga08-in.huawei.com (SkyGuard) with ESMTP id 4MBYpg5lkbz1N7Yg; Tue, 23 Aug 2022 10:59:07 +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; Tue, 23 Aug 2022 11:02:35 +0800 From: Miaohe Lin To: , , CC: , , , Subject: [PATCH v2 1/6] mm/hugetlb: fix incorrect update of max_huge_pages Date: Tue, 23 Aug 2022 11:02:04 +0800 Message-ID: <20220823030209.57434-2-linmiaohe@huawei.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20220823030209.57434-1-linmiaohe@huawei.com> References: <20220823030209.57434-1-linmiaohe@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [10.175.124.27] X-ClientProxiedBy: dggems701-chm.china.huawei.com (10.3.19.178) 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 Content-Type: text/plain; charset="utf-8" There should be pages_per_huge_page(h) / pages_per_huge_page(target_hstate) pages incremented for target_hstate->max_huge_pages when page is demoted. Update max_huge_pages accordingly for consistency. Signed-off-by: Miaohe Lin Reviewed-by: Muchun Song --- mm/hugetlb.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/hugetlb.c b/mm/hugetlb.c index f8f1540108ab..19a7a83af569 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -3473,7 +3473,8 @@ static int demote_free_huge_page(struct hstate *h, st= ruct page *page) * based on pool changes for the demoted page. */ h->max_huge_pages--; - target_hstate->max_huge_pages +=3D pages_per_huge_page(h); + target_hstate->max_huge_pages +=3D + pages_per_huge_page(h) / pages_per_huge_page(target_hstate); =20 return rc; } --=20 2.23.0