From patchwork Mon Apr 17 20:50:15 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vishal Moola X-Patchwork-Id: 13214594 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 27BD1C7EE23 for ; Mon, 17 Apr 2023 20:52:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230302AbjDQUww (ORCPT ); Mon, 17 Apr 2023 16:52:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39210 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229884AbjDQUwt (ORCPT ); Mon, 17 Apr 2023 16:52:49 -0400 Received: from mail-pj1-x1031.google.com (mail-pj1-x1031.google.com [IPv6:2607:f8b0:4864:20::1031]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0C9024206; Mon, 17 Apr 2023 13:52:46 -0700 (PDT) Received: by mail-pj1-x1031.google.com with SMTP id z11-20020a17090abd8b00b0024721c47ceaso14038653pjr.3; Mon, 17 Apr 2023 13:52:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1681764765; x=1684356765; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=hd0eSPgOtTAWwT17PjaULR/3wkbhGTdpKJdeXsj3/Vw=; b=pldku0ysKEp0NOEJOd7l0dIaF0yyGvAqpPlnmph3EM3Z2d65YTU4pF9c8hRBI8SIkB bXZgcndrjQg15zyEZxLW+H7cAmzYTJGKbe6hTNRu88cjrehCSqACdUD1N8GZKEqBE4Xp FwmFpHRnoIb29o3voauSnQ6p7drjWK4VEEwhJEits2ZcgZwb7+ryqE7mhLT9s2Dr91lB 24kMEEC0owKF37MtG1/RM5nwSQTWlS0iZbYOKzR4iyZZCfaJAgJ4qZTiCg2KEwK1Bku2 sGcyojF3egYr4Kr1rOZRroFrhK9ZnYopo4hTv+rSWBcsF96wp6BJQzFP7J0YdZ6544dh BRmg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1681764765; x=1684356765; 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=hd0eSPgOtTAWwT17PjaULR/3wkbhGTdpKJdeXsj3/Vw=; b=F1Re/JfxwltVJNY7tIky+d3uUj8MUIT4CVl6OnoUWqx8jhUoiM/wWaiiLkUH1FQltg K0gRWjYu2tli2m/CTjlszVr7P/pzXX2BxPfXhcIbSlaUHEPgkhayP/Jgoxmfa9YTXmXy yMF/oBH9EdR/7+1piCunsTJNAC6KWRbY1XE9DjfggrOGGJtaxh3lHj1RWdf//jrfLLwk dL3ugb0Pk5Rm65aDcs2zrXC/0t0ChrHrwF+Mu9QK9mxoAMbqmb+sNvTbK6Uj+BUCF7i7 VqlVh0Yadat/4xtMK3a0FQ9Idz/yprNcqUlHc2h4oC/wqkcaOqejF42vy5O2aBjjRMHu qXpg== X-Gm-Message-State: AAQBX9d7ggo90jWA89oh5XH5uYyNiuW6eTbPOGmr7N8XUbMh3UgAwA9s xGsATwCXooyZgET7Q/23IH8= X-Google-Smtp-Source: AKy350bJ4sdY66hQiY/gbzNJFaJpsyj9BEPw5KYAOTG4tZNrVmb2RliejTZYzbSXKDavSzAED/FXaQ== X-Received: by 2002:a17:90b:684:b0:246:f8a8:af02 with SMTP id m4-20020a17090b068400b00246f8a8af02mr15620340pjz.5.1681764765269; Mon, 17 Apr 2023 13:52:45 -0700 (PDT) Received: from fedora.hsd1.ca.comcast.net ([2601:644:937f:7f20::c139]) by smtp.googlemail.com with ESMTPSA id h7-20020a17090ac38700b0022335f1dae2sm7609707pjt.22.2023.04.17.13.52.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 17 Apr 2023 13:52:44 -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, "Vishal Moola (Oracle)" Subject: [PATCH 00/33] Split ptdesc from struct page Date: Mon, 17 Apr 2023 13:50:15 -0700 Message-Id: <20230417205048.15870-1-vishal.moola@gmail.com> X-Mailer: git-send-email 2.39.2 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 series is rebased on next-20230417. Vishal Moola (Oracle) (33): 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 | 218 +++++++++++------- arch/s390/mm/pgalloc.c | 126 +++++----- arch/sh/include/asm/pgalloc.h | 8 +- 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 | 138 +++++++---- include/linux/mm_types.h | 14 -- include/linux/pgtable.h | 60 +++++ mm/memory.c | 8 +- 38 files changed, 625 insertions(+), 446 deletions(-)