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 X-Spam-Level: X-Spam-Status: No, score=-20.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 7DD31C11F67 for ; Tue, 6 Jul 2021 12:12:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6940C621F9 for ; Tue, 6 Jul 2021 12:12:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343517AbhGFMO3 (ORCPT ); Tue, 6 Jul 2021 08:14:29 -0400 Received: from mail.kernel.org ([198.145.29.99]:47620 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234908AbhGFLgd (ORCPT ); Tue, 6 Jul 2021 07:36:33 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 4C91561CF6; Tue, 6 Jul 2021 11:29:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1625570958; bh=MCQpnu3VrSwS07KU2tshh1HSlp1qQeuYL1AzCQd7Sjg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mDuq2UVDMUVfvR/S2uIkUZCh6aCwxgUDcJfM6TQN6ioYRBqh2dR1is0FRzErQv8AD csEih3jSoRDox0ceyfMeRYzwXHCE35hrxGV1AxtekoSqWLBGuwOgt1J5o/JVxvPPxR nKvOCygaEvBvmLvTCuDSO55rHPRtI5vXlIFN+zLJHZ20zlTDs7a41HsDI3h4PPXYE5 1DSQ34GVI0TC8GHOXAVMJsXp2/IB+GCCuvHoskn8VU9KVwm+UsPjCxRkPOqVA8Yomj JDSK0GhIQIPDeEe+OwI03rSP024bHN0y5qI7Jk3zadutSzs5axbLf/hSSt5H/f5xjD RJz6DVTPDw7QQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Huang Pei , Thomas Bogendoerfer , Sasha Levin , linux-mips@vger.kernel.org Subject: [PATCH AUTOSEL 4.9 24/35] MIPS: add PMD table accounting into MIPS'pmd_alloc_one Date: Tue, 6 Jul 2021 07:28:36 -0400 Message-Id: <20210706112848.2066036-24-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210706112848.2066036-1-sashal@kernel.org> References: <20210706112848.2066036-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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 a03e86969f78..ff982d8b62f6 100644 --- a/arch/mips/include/asm/pgalloc.h +++ b/arch/mips/include/asm/pgalloc.h @@ -107,11 +107,15 @@ 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; } -- 2.30.2