From patchwork Thu Jul 15 18:37:48 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 478230 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7CECAC636CA for ; Thu, 15 Jul 2021 18:49:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 630D4613E0 for ; Thu, 15 Jul 2021 18:49:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239842AbhGOSwv (ORCPT ); Thu, 15 Jul 2021 14:52:51 -0400 Received: from mail.kernel.org ([198.145.29.99]:52350 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239588AbhGOSwL (ORCPT ); Thu, 15 Jul 2021 14:52:11 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id C3FC3613E0; Thu, 15 Jul 2021 18:49:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626374957; bh=3vY8jkLEb5T5wUhD3hW2OPPBQIV5VgHI3/oaBlcpP+M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jZMVvwlTtexTbCAszcky9gv5Ub5yIVJ5ifnEj1GURy5LXHOocjmwMqaspMmhUSQ3T 4n26cch7bdOVQGNSOmHMwqX3RLK6nAAHBGJamYgnxTJCDWZA3eVSh4/7yCcZxFbxqc uAumrpc/KwYMV4de9B5HWreSa48XrfAw5ZGZDNZk= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Huang Pei , Thomas Bogendoerfer , Sasha Levin Subject: [PATCH 5.10 096/215] MIPS: add PMD table accounting into MIPSpmd_alloc_one Date: Thu, 15 Jul 2021 20:37:48 +0200 Message-Id: <20210715182616.287897032@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210715182558.381078833@linuxfoundation.org> References: <20210715182558.381078833@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Huang Pei [ Upstream commit ed914d48b6a1040d1039d371b56273d422c0081e ] This fixes Page Table accounting bug. MIPS is the ONLY arch just defining __HAVE_ARCH_PMD_ALLOC_ONE alone. Since commit b2b29d6d011944 (mm: account PMD tables like PTE tables), "pmd_free" in asm-generic with PMD table accounting and "pmd_alloc_one" in MIPS without PMD table accounting causes PageTable accounting number negative, which read by global_zone_page_state(), always returns 0. Signed-off-by: Huang Pei Signed-off-by: Thomas Bogendoerfer Signed-off-by: Sasha Levin --- arch/mips/include/asm/pgalloc.h | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/arch/mips/include/asm/pgalloc.h b/arch/mips/include/asm/pgalloc.h index 8b18424b3120..d0cf997b4ba8 100644 --- a/arch/mips/include/asm/pgalloc.h +++ b/arch/mips/include/asm/pgalloc.h @@ -59,11 +59,15 @@ do { \ static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address) { - pmd_t *pmd; + pmd_t *pmd = NULL; + struct page *pg; - pmd = (pmd_t *) __get_free_pages(GFP_KERNEL, PMD_ORDER); - if (pmd) + pg = alloc_pages(GFP_KERNEL | __GFP_ACCOUNT, PMD_ORDER); + if (pg) { + pgtable_pmd_page_ctor(pg); + pmd = (pmd_t *)page_address(pg); pmd_init((unsigned long)pmd, (unsigned long)invalid_pte_table); + } return pmd; }