From nobody Sat Apr 11 04:00:14 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 988C8C3F6B0 for ; Tue, 16 Aug 2022 13:06:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234718AbiHPNG1 (ORCPT ); Tue, 16 Aug 2022 09:06:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56444 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233260AbiHPNGW (ORCPT ); Tue, 16 Aug 2022 09:06:22 -0400 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CB8F0109C for ; Tue, 16 Aug 2022 06:06:20 -0700 (PDT) Received: from canpemm500002.china.huawei.com (unknown [172.30.72.56]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4M6WXf2C2LzkWQq; Tue, 16 Aug 2022 21:02:58 +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, 16 Aug 2022 21:06:17 +0800 From: Miaohe Lin To: , , CC: , , Subject: [PATCH 1/6] mm/hugetlb: fix incorrect update of max_huge_pages Date: Tue, 16 Aug 2022 21:05:48 +0800 Message-ID: <20220816130553.31406-2-linmiaohe@huawei.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20220816130553.31406-1-linmiaohe@huawei.com> References: <20220816130553.31406-1-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 ea1c7bfa1cc3..e72052964fb5 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -3472,7 +3472,8 @@ 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