From patchwork Mon Jun 12 21:03:49 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vishal Moola X-Patchwork-Id: 13277499 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 72DD3CA9EAB for ; Mon, 12 Jun 2023 21:08:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238979AbjFLVIH (ORCPT ); Mon, 12 Jun 2023 17:08:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57292 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238892AbjFLVHu (ORCPT ); Mon, 12 Jun 2023 17:07:50 -0400 Received: from mail-yw1-x1130.google.com (mail-yw1-x1130.google.com [IPv6:2607:f8b0:4864:20::1130]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BE38D1B8; Mon, 12 Jun 2023 14:04:46 -0700 (PDT) Received: by mail-yw1-x1130.google.com with SMTP id 00721157ae682-56d2b7a9465so15626527b3.3; Mon, 12 Jun 2023 14:04:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1686603886; x=1689195886; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=/6pdu881MOfYV84y7VWiKcwnRMuA78CxiUeG+tta1a0=; b=AczjUHTxusxNkOV7VOEz6qxIWLPwqleq1d3zEUXquo3Fhsoe1KG76B/gUTqOv/33pt hkZpJlkJ76KcjlL6x+InhPSbBDifa6NLLiEoUNkBXYArrGr7STcImjuc2VoeU9NxvC54 lebWddx8WzULKd+NI5c/Uram1goESu9pTxdzE6eH38FehdYYICJ+bMuQn+ugw7AsVbL/ Ov7eTgdYCG1Jz6kQBnoPdVHFrSKaQB695zJO8R2Ai20iELWwDV05kAAdjc5zIkHXp/c4 vxfy2MDQ46mM15p8VfpaN3wDCzp8jtDUPX+KA7Bdo1ZYDTCwrfTMRa5pYDNMk4zv//aF toWw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1686603886; x=1689195886; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=/6pdu881MOfYV84y7VWiKcwnRMuA78CxiUeG+tta1a0=; b=itspIMY2yV8DNafmujNae2O5LlRgBoD7SD4tysYPhpBqinMf70MHKZnu6IZcR12ca+ vlpo7CvcHYoLRUs8HTIjZC63GD7XLV2l7cK4qFk9VlYdJ6BoqlWHjN45Cj94x+LOo5zN 4Toz8ZczcVSo3FBf6gEUb/eGoWsDFwZsfa37YO/Sb3s0LY6UErYkKkT6SHWvesLksNUh zeOj5nl/MgbTh5V+DLhFQgsXGKD1H2kkxgob6gt+53kCaWCdSQPwwIx/sd53AaDCUyJu NZFMrLqwxaauM4ZKmPGiUAKhqqdyJ4QNkdPyKUVrywrfXqivid8FlObV9eubf07dwWAJ iQcg== X-Gm-Message-State: AC+VfDwPXmcPo4TyfQ+C0BpEK3Yi6OJ8eiRGFuIYQh+lpVu8enrnqv4A uMc1zwanKfvBiM7/abDvp0E= X-Google-Smtp-Source: ACHHUZ4D/9qj+eGd5vw1y9G2WYuQd6/SQmHuMHA9sQRxkw6xMG4/k6MTzo+MEXSeyQMTFJpwz0FYww== X-Received: by 2002:a0d:cb83:0:b0:56d:4b3:c1cd with SMTP id n125-20020a0dcb83000000b0056d04b3c1cdmr6860688ywd.40.1686603885891; Mon, 12 Jun 2023 14:04:45 -0700 (PDT) Received: from unknowna0e70b2ca394.attlocal.net ([2600:1700:2f7d:1800::16]) by smtp.googlemail.com with ESMTPSA id s125-20020a817783000000b00569eb609458sm2757115ywc.81.2023.06.12.14.04.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 12 Jun 2023 14:04:45 -0700 (PDT) From: "Vishal Moola (Oracle)" To: Andrew Morton , Matthew Wilcox Cc: linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-openrisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, xen-devel@lists.xenproject.org, kvm@vger.kernel.org, Hugh Dickins , "Vishal Moola (Oracle)" , Catalin Marinas , Huacai Chen , Geert Uytterhoeven , Thomas Bogendoerfer , Dinh Nguyen , Jonas Bonn , David Hildenbrand , Claudio Imbrenda , Paul Walmsley , "David S. Miller" , Richard Weinberger , Yoshinori Sato , Dave Hansen , Arnd Bergmann , Christophe Leroy Subject: [PATCH v4 00/34] Split ptdesc from struct page Date: Mon, 12 Jun 2023 14:03:49 -0700 Message-Id: <20230612210423.18611-1-vishal.moola@gmail.com> X-Mailer: git-send-email 2.40.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org The MM subsystem is trying to shrink struct page. This patchset introduces a memory descriptor for page table tracking - struct ptdesc. This patchset introduces ptdesc, splits ptdesc from struct page, and converts many callers of page table constructor/destructors to use ptdescs. Ptdesc is a foundation to further standardize page tables, and eventually allow for dynamic allocation of page tables independent of struct page. However, the use of pages for page table tracking is quite deeply ingrained and varied across archictectures, so there is still a lot of work to be done before that can happen. This is rebased on next-20230609. v4: Got more Acked-bys Fixed m68k compilation issue Dropped unnecessary casts Cleanup some fields in struct ptdesc Vishal Moola (Oracle) (34): mm: Add PAGE_TYPE_OP folio functions s390: Use _pt_s390_gaddr for gmap address tracking s390: Use pt_frag_refcount for pagetables pgtable: Create struct ptdesc mm: add utility functions for ptdesc mm: Convert pmd_pgtable_page() to pmd_ptdesc() mm: Convert ptlock_alloc() to use ptdescs mm: Convert ptlock_ptr() to use ptdescs mm: Convert pmd_ptlock_init() to use ptdescs mm: Convert ptlock_init() to use ptdescs mm: Convert pmd_ptlock_free() to use ptdescs mm: Convert ptlock_free() to use ptdescs mm: Create ptdesc equivalents for pgtable_{pte,pmd}_page_{ctor,dtor} powerpc: Convert various functions to use ptdescs x86: Convert various functions to use ptdescs s390: Convert various gmap functions to use ptdescs s390: Convert various pgalloc functions to use ptdescs mm: Remove page table members from struct page pgalloc: Convert various functions to use ptdescs arm: Convert various functions to use ptdescs arm64: Convert various functions to use ptdescs csky: Convert __pte_free_tlb() to use ptdescs hexagon: Convert __pte_free_tlb() to use ptdescs loongarch: Convert various functions to use ptdescs m68k: Convert various functions to use ptdescs mips: Convert various functions to use ptdescs nios2: Convert __pte_free_tlb() to use ptdescs openrisc: Convert __pte_free_tlb() to use ptdescs riscv: Convert alloc_{pmd, pte}_late() to use ptdescs sh: Convert pte_free_tlb() to use ptdescs sparc64: Convert various functions to use ptdescs sparc: Convert pgtable_pte_page_{ctor, dtor}() to ptdesc equivalents um: Convert {pmd, pte}_free_tlb() to use ptdescs mm: Remove pgtable_{pmd, pte}_page_{ctor, dtor}() wrappers Documentation/mm/split_page_table_lock.rst | 12 +- .../zh_CN/mm/split_page_table_lock.rst | 14 +- arch/arm/include/asm/tlb.h | 12 +- arch/arm/mm/mmu.c | 6 +- arch/arm64/include/asm/tlb.h | 14 +- arch/arm64/mm/mmu.c | 7 +- arch/csky/include/asm/pgalloc.h | 4 +- arch/hexagon/include/asm/pgalloc.h | 8 +- arch/loongarch/include/asm/pgalloc.h | 27 ++- arch/loongarch/mm/pgtable.c | 7 +- arch/m68k/include/asm/mcf_pgalloc.h | 41 ++-- arch/m68k/include/asm/sun3_pgalloc.h | 8 +- arch/m68k/mm/motorola.c | 4 +- arch/mips/include/asm/pgalloc.h | 31 +-- arch/mips/mm/pgtable.c | 7 +- arch/nios2/include/asm/pgalloc.h | 8 +- arch/openrisc/include/asm/pgalloc.h | 8 +- arch/powerpc/mm/book3s64/mmu_context.c | 10 +- arch/powerpc/mm/book3s64/pgtable.c | 32 +-- arch/powerpc/mm/pgtable-frag.c | 46 ++-- arch/riscv/include/asm/pgalloc.h | 8 +- arch/riscv/mm/init.c | 16 +- arch/s390/include/asm/pgalloc.h | 4 +- arch/s390/include/asm/tlb.h | 4 +- arch/s390/mm/gmap.c | 222 +++++++++++------- arch/s390/mm/pgalloc.c | 126 +++++----- arch/sh/include/asm/pgalloc.h | 9 +- arch/sparc/mm/init_64.c | 17 +- arch/sparc/mm/srmmu.c | 5 +- arch/um/include/asm/pgalloc.h | 18 +- arch/x86/mm/pgtable.c | 46 ++-- arch/x86/xen/mmu_pv.c | 2 +- include/asm-generic/pgalloc.h | 62 +++-- include/asm-generic/tlb.h | 11 + include/linux/mm.h | 155 ++++++++---- include/linux/mm_types.h | 14 -- include/linux/page-flags.h | 20 +- include/linux/pgtable.h | 60 +++++ mm/memory.c | 8 +- 39 files changed, 664 insertions(+), 449 deletions(-)