From patchwork Tue Jul 25 04:20:20 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Vishal Moola (Oracle)" X-Patchwork-Id: 13325777 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 D8C85C05052 for ; Tue, 25 Jul 2023 04:21:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231654AbjGYEVP (ORCPT ); Tue, 25 Jul 2023 00:21:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51856 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229577AbjGYEVM (ORCPT ); Tue, 25 Jul 2023 00:21:12 -0400 Received: from mail-yb1-xb2f.google.com (mail-yb1-xb2f.google.com [IPv6:2607:f8b0:4864:20::b2f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6C0B7E71; Mon, 24 Jul 2023 21:21:07 -0700 (PDT) Received: by mail-yb1-xb2f.google.com with SMTP id 3f1490d57ef6-ca3cc52ee62so5588835276.0; Mon, 24 Jul 2023 21:21:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1690258866; x=1690863666; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=TyJK1FcnJgXFfZtNrnEiwbnRrWFFZ4hxtDemQIw/+70=; b=IWbM/8TKnsrsFnwfAtrtbT7DO2Dq3vbt1JDGjncQR1/QHrfo4QUSkIiEQN1x/WCeen Wq+1xfZOSXiXa3ftlSpFueFEFpvRBK3/RSrU5gjulTAyP6CHn+1+IFvHFglXW6v8keEi 8OQyuFtLfuzytADBe5cFOUdQJ/Hdq1bfJlON7Nb+Mx5/ezSX5vpuq992erh0MteP8eY0 ca2RegvmV6aTmEkiWQSzVkeiWkjDFWU6BxECXoDX15tgD4oeetn4XjwJQHkKr/UZi4jn M2rzWVhqQ0uUKv1+kbt9dezvn9EL8NwkaBEBxeHbR53ElScFeaGw8CT+ZDStPX5ya8Y8 SH2Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690258866; x=1690863666; 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=TyJK1FcnJgXFfZtNrnEiwbnRrWFFZ4hxtDemQIw/+70=; b=JxXHwisl9uOYCmE7iHDoGgy86XeBdrMU/xZ5xC1ih7+UXLHztjzzWMjYUQIiDU9F1p N6dNMMiG1k7F9FajnXyoHqvqa7AsTvHRLrgeT9lH7Fn4STyvUR8UDjRCRnIOnp4E5xyL G9867Fi4229ExI8S0lyS1jctX3/azHiTvelzdXJsTr5NfosKM1HIEdK8F2HbeQM7KQSm JJBcSeU/UyflVOl+2bpu/eMFMjWt3UQKWLOoOb799mKajIRwkCPDBupOTctRB0qISKvw A9+kYbVDDf1xT6k3ussrW1KSgXxvl5p/V2BWK1y8OgiZSSfq1Ss5C1AG03nrS/8lplB+ pDBA== X-Gm-Message-State: ABy/qLaOxOQzF210Yvb8HOBALa2cKmvCsWQN7AgLQiV3VlxKh3rJAQmi ssHMEn3d3VrapCc3WVY38pQ= X-Google-Smtp-Source: APBJJlGpggWKl9mhx1f6cNzYJrVg2oqym/Xg0n0t+vhY+yg/UIrQUebANCL8UUu/vWaCrzFFriLNMw== X-Received: by 2002:a25:844f:0:b0:cf0:b977:2794 with SMTP id r15-20020a25844f000000b00cf0b9772794mr10487441ybm.30.1690258866444; Mon, 24 Jul 2023 21:21:06 -0700 (PDT) Received: from unknowna0e70b2ca394.attlocal.net ([2600:1700:2f7d:1800::16]) by smtp.googlemail.com with ESMTPSA id h9-20020a25b189000000b00d0db687ef48sm1175540ybj.61.2023.07.24.21.21.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 24 Jul 2023 21:21:05 -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 mm-unstable v7 00/31] Split ptdesc from struct page Date: Mon, 24 Jul 2023 21:20:20 -0700 Message-Id: <20230725042051.36691-1-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 mm-unstable. v7: Drop s390 gmap ptdesc conversions - gmap is unecessary complication that can be dealt with later Be more thorough with ptdesc struct sanity checks and comments Rebase onto mm-unstable Vishal Moola (Oracle) (31): mm: Add PAGE_TYPE_OP folio functions pgtable: Create struct ptdesc mm: add utility functions for ptdesc mm: Convert pmd_pgtable_page() callers to use 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 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 | 7 +- 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 | 47 +++--- arch/m68k/include/asm/sun3_pgalloc.h | 8 +- arch/m68k/mm/motorola.c | 4 +- arch/mips/include/asm/pgalloc.h | 32 ++-- arch/mips/mm/pgtable.c | 8 +- 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 | 56 +++---- 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/pgalloc.c | 128 +++++++-------- 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 | 47 +++--- arch/x86/xen/mmu_pv.c | 2 +- include/asm-generic/pgalloc.h | 88 +++++----- include/asm-generic/tlb.h | 11 ++ include/linux/mm.h | 151 +++++++++++++----- include/linux/mm_types.h | 18 --- include/linux/page-flags.h | 30 +++- include/linux/pgtable.h | 80 ++++++++++ mm/memory.c | 8 +- 38 files changed, 585 insertions(+), 384 deletions(-)