The patch titled
Subject: mm: remove page table members from struct page
has been added to the -mm mm-unstable branch. Its filename is
mm-remove-page-table-members-from-struct-page.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-remove-page-table-members-from-struct-page.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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 via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
From: "Vishal Moola (Oracle)" <vishal.moola@xxxxxxxxx>
Subject: mm: remove page table members from struct page
Date: Mon, 31 Jul 2023 10:03:16 -0700
The page table members are now split out into their own ptdesc struct.
Remove them from struct page.
Link: https://lkml.kernel.org/r/20230731170332.69404-16-vishal.moola@xxxxxxxxx
Signed-off-by: Vishal Moola (Oracle) <vishal.moola@xxxxxxxxx>
Acked-by: Mike Rapoport (IBM) <rppt@xxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
Cc: Claudio Imbrenda <imbrenda@xxxxxxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: David S. Miller <davem@xxxxxxxxxxxxx>
Cc: Dinh Nguyen <dinguyen@xxxxxxxxxx>
Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Cc: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Cc: Guo Ren <guoren@xxxxxxxxxx>
Cc: Huacai Chen <chenhuacai@xxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: John Paul Adrian Glaubitz <glaubitz@xxxxxxxxxxxxxxxxxxx>
Cc: Jonas Bonn <jonas@xxxxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Palmer Dabbelt <palmer@xxxxxxxxxxxx>
Cc: Paul Walmsley <paul.walmsley@xxxxxxxxxx>
Cc: Richard Weinberger <richard@xxxxxx>
Cc: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>
Cc: Yoshinori Sato <ysato@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/mm_types.h | 18 ------------------
include/linux/pgtable.h | 3 ---
2 files changed, 21 deletions(-)
--- a/include/linux/mm_types.h~mm-remove-page-table-members-from-struct-page
+++ a/include/linux/mm_types.h
@@ -141,24 +141,6 @@ struct page {
struct { /* Tail pages of compound page */
unsigned long compound_head; /* Bit zero is set */
};
- struct { /* Page table pages */
- unsigned long _pt_pad_1; /* compound_head */
- pgtable_t pmd_huge_pte; /* protected by page->ptl */
- /*
- * A PTE page table page might be freed by use of
- * rcu_head: which overlays those two fields above.
- */
- unsigned long _pt_pad_2; /* mapping */
- union {
- struct mm_struct *pt_mm; /* x86 pgds only */
- atomic_t pt_frag_refcount; /* powerpc */
- };
-#if ALLOC_SPLIT_PTLOCKS
- spinlock_t *ptl;
-#else
- spinlock_t ptl;
-#endif
- };
struct { /* ZONE_DEVICE pages */
/** @pgmap: Points to the hosting device page map. */
struct dev_pagemap *pgmap;
--- a/include/linux/pgtable.h~mm-remove-page-table-members-from-struct-page
+++ a/include/linux/pgtable.h
@@ -1056,10 +1056,7 @@ struct ptdesc {
TABLE_MATCH(flags, __page_flags);
TABLE_MATCH(compound_head, pt_list);
TABLE_MATCH(compound_head, _pt_pad_1);
-TABLE_MATCH(pmd_huge_pte, pmd_huge_pte);
TABLE_MATCH(mapping, __page_mapping);
-TABLE_MATCH(pt_mm, pt_mm);
-TABLE_MATCH(ptl, ptl);
TABLE_MATCH(rcu_head, pt_rcu_head);
TABLE_MATCH(page_type, __page_type);
TABLE_MATCH(_refcount, _refcount);
_
Patches currently in -mm which might be from vishal.moola@xxxxxxxxx are
mm-add-page_type_op-folio-functions.patch
pgtable-create-struct-ptdesc.patch
mm-add-utility-functions-for-ptdesc.patch
mm-convert-pmd_pgtable_page-callers-to-use-pmd_ptdesc.patch
mm-convert-ptlock_alloc-to-use-ptdescs.patch
mm-convert-ptlock_ptr-to-use-ptdescs.patch
mm-convert-pmd_ptlock_init-to-use-ptdescs.patch
mm-convert-ptlock_init-to-use-ptdescs.patch
mm-convert-pmd_ptlock_free-to-use-ptdescs.patch
mm-convert-ptlock_free-to-use-ptdescs.patch
mm-create-ptdesc-equivalents-for-pgtable_ptepmd_page_ctordtor.patch
powerpc-convert-various-functions-to-use-ptdescs.patch
x86-convert-various-functions-to-use-ptdescs.patch
s390-convert-various-pgalloc-functions-to-use-ptdescs.patch
mm-remove-page-table-members-from-struct-page.patch
pgalloc-convert-various-functions-to-use-ptdescs.patch
arm-convert-various-functions-to-use-ptdescs.patch
arm64-convert-various-functions-to-use-ptdescs.patch
csky-convert-__pte_free_tlb-to-use-ptdescs.patch
hexagon-convert-__pte_free_tlb-to-use-ptdescs.patch
loongarch-convert-various-functions-to-use-ptdescs.patch
m68k-convert-various-functions-to-use-ptdescs.patch
mips-convert-various-functions-to-use-ptdescs.patch
nios2-convert-__pte_free_tlb-to-use-ptdescs.patch
openrisc-convert-__pte_free_tlb-to-use-ptdescs.patch
riscv-convert-alloc_pmd-pte_late-to-use-ptdescs.patch
sh-convert-pte_free_tlb-to-use-ptdescs.patch
sparc64-convert-various-functions-to-use-ptdescs.patch
sparc-convert-pgtable_pte_page_ctor-dtor-to-ptdesc-equivalents.patch
um-convert-pmd-pte_free_tlb-to-use-ptdescs.patch
mm-remove-pgtable_pmd-pte_page_ctor-dtor-wrappers.patch
