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From: "Vishal Moola (Oracle)" <vishal.moola@gmail.com>
To: Andrew Morton <akpm@linux-foundation.org>,
	Matthew Wilcox <willy@infradead.org>
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 <hughd@google.com>,
	"Vishal Moola (Oracle)" <vishal.moola@gmail.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Huacai Chen <chenhuacai@kernel.org>,
	Geert Uytterhoeven <geert@linux-m68k.org>,
	Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
	Dinh Nguyen <dinguyen@kernel.org>,
	Jonas Bonn <jonas@southpole.se>,
	David Hildenbrand <david@redhat.com>,
	Claudio Imbrenda <imbrenda@linux.ibm.com>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	"David S. Miller" <davem@davemloft.net>,
	Richard Weinberger <richard@nod.at>,
	Yoshinori Sato <ysato@users.sourceforge.jp>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	Arnd Bergmann <arnd@arndb.de>,
	Christophe Leroy <christophe.leroy@csgroup.eu>
Subject: [PATCH v5 00/33] Split ptdesc from struct page
Date: Thu, 22 Jun 2023 13:57:12 -0700	[thread overview]
Message-ID: <20230622205745.79707-1-vishal.moola@gmail.com> (raw)

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-20230621.

There is a minor conflict with patch 24 and the mm-unstable tree in
arch/m68k/mm/motorola.c - The end result of applying the patch should
be the same.


v5:
  More Acked-bys :)
  Cleanup some documentation wording and formatting
  Add pt_rcu_head to ptdesc
  Add memcg to ptdesc (and align it with struct page)
  Ensure all get_free_page() callers prohibit HIGHMEM for 32 bit support.
  Renamed folio_{set, clear}_table() to folio_{set, clear}_pgtable()
  Removed pagetable_clear() as it is not necessary right now
  pagetable_free() now sets page->mapping = NULL
  Dropped s390 _refcount to _pt_frag_refcount conversion patch

Vishal Moola (Oracle) (33):
  mm: Add PAGE_TYPE_OP folio functions
  s390: Use _pt_s390_gaddr for gmap address tracking
  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                             |   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           |  43 ++--
 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                |  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                           | 207 ++++++++++--------
 arch/s390/mm/pgalloc.c                        | 108 ++++-----
 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                            | 153 +++++++++----
 include/linux/mm_types.h                      |  14 --
 include/linux/page-flags.h                    |  30 ++-
 include/linux/pgtable.h                       |  77 +++++++
 mm/memory.c                                   |   8 +-
 39 files changed, 684 insertions(+), 453 deletions(-)

-- 
2.40.1


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             reply	other threads:[~2023-06-22 20:58 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-06-22 20:57 Vishal Moola (Oracle) [this message]
2023-06-22 20:57 ` [PATCH v5 01/33] mm: Add PAGE_TYPE_OP folio functions Vishal Moola (Oracle)
2023-06-22 20:57 ` [PATCH v5 02/33] s390: Use _pt_s390_gaddr for gmap address tracking Vishal Moola (Oracle)
2023-06-22 20:57 ` [PATCH v5 03/33] pgtable: Create struct ptdesc Vishal Moola (Oracle)
2023-06-22 20:57 ` [PATCH v5 04/33] mm: add utility functions for ptdesc Vishal Moola (Oracle)
2023-06-22 20:57 ` [PATCH v5 05/33] mm: Convert pmd_pgtable_page() to pmd_ptdesc() Vishal Moola (Oracle)
2023-06-22 20:57 ` [PATCH v5 06/33] mm: Convert ptlock_alloc() to use ptdescs Vishal Moola (Oracle)
2023-06-22 20:57 ` [PATCH v5 07/33] mm: Convert ptlock_ptr() " Vishal Moola (Oracle)
2023-06-22 20:57 ` [PATCH v5 08/33] mm: Convert pmd_ptlock_init() " Vishal Moola (Oracle)
2023-06-22 20:57 ` [PATCH v5 09/33] mm: Convert ptlock_init() " Vishal Moola (Oracle)
2023-06-22 20:57 ` [PATCH v5 10/33] mm: Convert pmd_ptlock_free() " Vishal Moola (Oracle)
2023-06-22 20:57 ` [PATCH v5 11/33] mm: Convert ptlock_free() " Vishal Moola (Oracle)
2023-06-22 20:57 ` [PATCH v5 12/33] mm: Create ptdesc equivalents for pgtable_{pte,pmd}_page_{ctor,dtor} Vishal Moola (Oracle)
2023-06-22 20:57 ` [PATCH v5 13/33] powerpc: Convert various functions to use ptdescs Vishal Moola (Oracle)
2023-06-22 20:57 ` [PATCH v5 14/33] x86: " Vishal Moola (Oracle)
2023-06-22 20:57 ` [PATCH v5 15/33] s390: Convert various gmap " Vishal Moola (Oracle)
2023-06-22 20:57 ` [PATCH v5 16/33] s390: Convert various pgalloc " Vishal Moola (Oracle)
2023-06-22 20:57 ` [PATCH v5 17/33] mm: Remove page table members from struct page Vishal Moola (Oracle)
2023-06-22 20:57 ` [PATCH v5 18/33] pgalloc: Convert various functions to use ptdescs Vishal Moola (Oracle)
2023-06-22 20:57 ` [PATCH v5 19/33] arm: " Vishal Moola (Oracle)
2023-06-22 20:57 ` [PATCH v5 20/33] arm64: " Vishal Moola (Oracle)
2023-06-22 20:57 ` [PATCH v5 21/33] csky: Convert __pte_free_tlb() " Vishal Moola (Oracle)
2023-06-22 20:57 ` [PATCH v5 22/33] hexagon: " Vishal Moola (Oracle)
2023-06-22 20:57 ` [PATCH v5 23/33] loongarch: Convert various functions " Vishal Moola (Oracle)
2023-06-22 20:57 ` [PATCH v5 24/33] m68k: " Vishal Moola (Oracle)
2023-06-25  7:57   ` kernel test robot
2023-06-25  8:51   ` Geert Uytterhoeven
2023-06-22 20:57 ` [PATCH v5 25/33] mips: " Vishal Moola (Oracle)
2023-06-22 20:57 ` [PATCH v5 26/33] nios2: Convert __pte_free_tlb() " Vishal Moola (Oracle)
2023-06-22 22:05   ` Dinh Nguyen
2023-06-27  5:47   ` Guenter Roeck
2023-06-27 17:42     ` Vishal Moola
2023-06-27 19:10       ` Guenter Roeck
2023-06-27 19:14         ` Guenter Roeck
2023-06-27 19:56           ` Vishal Moola
2023-06-27 20:05             ` Dinh Nguyen
2023-06-27 21:01               ` Guenter Roeck
2023-06-27 21:46                 ` Dinh Nguyen
2023-06-27 21:57                   ` Guenter Roeck
2023-06-22 20:57 ` [PATCH v5 27/33] openrisc: " Vishal Moola (Oracle)
2023-06-22 20:57 ` [PATCH v5 28/33] riscv: Convert alloc_{pmd, pte}_late() " Vishal Moola (Oracle)
2023-06-22 20:57 ` [PATCH v5 29/33] sh: Convert pte_free_tlb() " Vishal Moola (Oracle)
2023-06-22 20:57 ` [PATCH v5 30/33] sparc64: Convert various functions " Vishal Moola (Oracle)
2023-06-22 20:57 ` [PATCH v5 31/33] sparc: Convert pgtable_pte_page_{ctor, dtor}() to ptdesc equivalents Vishal Moola (Oracle)
2023-06-22 20:57 ` [PATCH v5 32/33] um: Convert {pmd, pte}_free_tlb() to use ptdescs Vishal Moola (Oracle)
2023-06-22 20:57 ` [PATCH v5 33/33] mm: Remove pgtable_{pmd, pte}_page_{ctor, dtor}() wrappers Vishal Moola (Oracle)

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