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=-6.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no 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 76C49C433E1 for ; Tue, 18 Aug 2020 23:05:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 518DF20738 for ; Tue, 18 Aug 2020 23:05:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597791945; bh=xqS/BsBLIjTwh+n+qWSUkPEzbjhrGprWJ+aexA5BU4U=; h=Date:From:To:Subject:In-Reply-To:Reply-To:List-ID:From; b=w93zkGqYQ609ub19niNUVvOCK4mlcWTHtAmt7iEQSxagpUHNDkgwt52LK4S3/Up6D Lob9W1tc09qjb3cxkW6FHVsax+1+g5XDCZosv2qIlaud2BaFWbdcvEnb28jhgzpffi ibS/qbH19ctOqYCTBy+GIQtpQnDHQVVio5OqcrkA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726980AbgHRXFp (ORCPT ); Tue, 18 Aug 2020 19:05:45 -0400 Received: from mail.kernel.org ([198.145.29.99]:36890 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726539AbgHRXFo (ORCPT ); Tue, 18 Aug 2020 19:05:44 -0400 Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id A53912065D; Tue, 18 Aug 2020 23:05:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597791944; bh=xqS/BsBLIjTwh+n+qWSUkPEzbjhrGprWJ+aexA5BU4U=; h=Date:From:To:Subject:In-Reply-To:From; b=p0Xehy5We06gQwj1bfJToHnBDTHE39dDme33HQekWbBxj39q6+AyOXK0Le4QeBNVp SYWC8229onND7fBz3w6YiN+TuMucdP1I1r2Y5NjBrIJEK3lMsTa/XiW1sPO6Qwd4/j J9Ao8gmG2FOm7EJkO57brWHsJLSe8zHiSng/vrXo= Date: Tue, 18 Aug 2020 16:05:43 -0700 From: Andrew Morton To: abdhalee@linux.vnet.ibm.com, arnd@arndb.de, christophe.leroy@csgroup.eu, jcmvbkbc@gmail.com, joro@8bytes.org, luto@kernel.org, mm-commits@vger.kernel.org, peterz@infradead.org, rppt@linux.ibm.com, sathnaga@linux.vnet.ibm.com, shorne@gmail.com, willy@infradead.org Subject: + mm-account-pmd-tables-like-pte-tables.patch added to -mm tree Message-ID: <20200818230543.H2OAv9kfU%akpm@linux-foundation.org> In-Reply-To: <20200814172939.55d6d80b6e21e4241f1ee1f3@linux-foundation.org> User-Agent: s-nail v14.8.16 Sender: mm-commits-owner@vger.kernel.org Precedence: bulk Reply-To: linux-kernel@vger.kernel.org List-ID: X-Mailing-List: mm-commits@vger.kernel.org The patch titled Subject: mm: account PMD tables like PTE tables has been added to the -mm tree. Its filename is mm-account-pmd-tables-like-pte-tables.patch This patch should soon appear at http://ozlabs.org/~akpm/mmots/broken-out/mm-account-pmd-tables-like-pte-tables.patch and later at http://ozlabs.org/~akpm/mmotm/broken-out/mm-account-pmd-tables-like-pte-tables.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: Matthew Wilcox Subject: mm: account PMD tables like PTE tables We account the PTE level of the page tables to the process in order to make smarter OOM decisions and help diagnose why memory is fragmented. For these same reasons, we should account pages allocated for PMDs. With larger process address spaces and ASLR, the number of PMDs in use is higher than it used to be so the inaccuracy is starting to matter. Link: http://lkml.kernel.org/r/20200627184642.GF25039@casper.infradead.org Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: Mike Rapoport Cc: Abdul Haleem Cc: Andy Lutomirski Cc: Arnd Bergmann Cc: Christophe Leroy Cc: Joerg Roedel Cc: Max Filippov Cc: Peter Zijlstra Cc: Satheesh Rajendran Cc: Stafford Horne Signed-off-by: Andrew Morton --- include/linux/mm.h | 24 ++++++++++++++++++++---- 1 file changed, 20 insertions(+), 4 deletions(-) --- a/include/linux/mm.h~mm-account-pmd-tables-like-pte-tables +++ a/include/linux/mm.h @@ -2239,7 +2239,7 @@ static inline spinlock_t *pmd_lockptr(st return ptlock_ptr(pmd_to_page(pmd)); } -static inline bool pgtable_pmd_page_ctor(struct page *page) +static inline bool pmd_ptlock_init(struct page *page) { #ifdef CONFIG_TRANSPARENT_HUGEPAGE page->pmd_huge_pte = NULL; @@ -2247,7 +2247,7 @@ static inline bool pgtable_pmd_page_ctor return ptlock_init(page); } -static inline void pgtable_pmd_page_dtor(struct page *page) +static inline void pmd_ptlock_free(struct page *page) { #ifdef CONFIG_TRANSPARENT_HUGEPAGE VM_BUG_ON_PAGE(page->pmd_huge_pte, page); @@ -2264,8 +2264,8 @@ static inline spinlock_t *pmd_lockptr(st return &mm->page_table_lock; } -static inline bool pgtable_pmd_page_ctor(struct page *page) { return true; } -static inline void pgtable_pmd_page_dtor(struct page *page) {} +static inline bool pmd_ptlock_init(struct page *page) { return true; } +static inline void pmd_ptlock_free(struct page *page) {} #define pmd_huge_pte(mm, pmd) ((mm)->pmd_huge_pte) @@ -2278,6 +2278,22 @@ static inline spinlock_t *pmd_lock(struc return ptl; } +static inline bool pgtable_pmd_page_ctor(struct page *page) +{ + if (!pmd_ptlock_init(page)) + return false; + __SetPageTable(page); + inc_zone_page_state(page, NR_PAGETABLE); + return true; +} + +static inline void pgtable_pmd_page_dtor(struct page *page) +{ + pmd_ptlock_free(page); + __ClearPageTable(page); + dec_zone_page_state(page, NR_PAGETABLE); +} + /* * No scalability reason to split PUD locks yet, but follow the same pattern * as the PMD locks to make it easier if we decide to. The VM should not be _ Patches currently in -mm which might be from willy@infradead.org are mm-account-pmd-tables-like-pte-tables.patch