The patch titled
Subject: mm/rmap: remove do_page_add_anon_rmap()
has been added to the -mm tree. Its filename is
mm-rmap-remove-do_page_add_anon_rmap.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-rmap-remove-do_page_add_anon_rmap.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-rmap-remove-do_page_add_anon_rmap.patch
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------------------------------------------------------
From: David Hildenbrand <david@xxxxxxxxxx>
Subject: mm/rmap: remove do_page_add_anon_rmap()
... and instead convert page_add_anon_rmap() to accept flags.
Passing flags instead of bools is usually nicer either way, and we want to
more often also pass RMAP_EXCLUSIVE in follow up patches when detecting
that an anonymous page is exclusive: for example, when restoring an
anonymous page from a writable migration entry.
This is a preparation for marking an anonymous page inside
page_add_anon_rmap() as exclusive when RMAP_EXCLUSIVE is passed.
Link: https://lkml.kernel.org/r/20220329160440.193848-7-david@xxxxxxxxxx
Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Don Dutile <ddutile@xxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Jan Kara <jack@xxxxxxx>
Cc: Jann Horn <jannh@xxxxxxxxxx>
Cc: Jason Gunthorpe <jgg@xxxxxxxxxx>
Cc: John Hubbard <jhubbard@xxxxxxxxxx>
Cc: Khalid Aziz <khalid.aziz@xxxxxxxxxx>
Cc: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Liang Zhang <zhangliang5@xxxxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Cc: Nadav Amit <namit@xxxxxxxxxx>
Cc: Oded Gabbay <oded.gabbay@xxxxxxxxx>
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Pedro Demarchi Gomes <pedrodemargomes@xxxxxxxxx>
Cc: Peter Xu <peterx@xxxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxxx>
Cc: Roman Gushchin <guro@xxxxxx>
Cc: Shakeel Butt <shakeelb@xxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Yang Shi <shy828301@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/rmap.h | 2 --
mm/huge_memory.c | 2 +-
mm/ksm.c | 2 +-
mm/memory.c | 4 ++--
mm/migrate.c | 3 ++-
mm/rmap.c | 14 +-------------
mm/swapfile.c | 2 +-
7 files changed, 8 insertions(+), 21 deletions(-)
--- a/include/linux/rmap.h~mm-rmap-remove-do_page_add_anon_rmap
+++ a/include/linux/rmap.h
@@ -183,8 +183,6 @@ typedef int __bitwise rmap_t;
*/
void page_move_anon_rmap(struct page *, struct vm_area_struct *);
void page_add_anon_rmap(struct page *, struct vm_area_struct *,
- unsigned long address, bool compound);
-void do_page_add_anon_rmap(struct page *, struct vm_area_struct *,
unsigned long address, rmap_t flags);
void page_add_new_anon_rmap(struct page *, struct vm_area_struct *,
unsigned long address, bool compound);
--- a/mm/huge_memory.c~mm-rmap-remove-do_page_add_anon_rmap
+++ a/mm/huge_memory.c
@@ -3073,7 +3073,7 @@ void remove_migration_pmd(struct page_vm
pmde = pmd_wrprotect(pmd_mkuffd_wp(pmde));
if (PageAnon(new))
- page_add_anon_rmap(new, vma, mmun_start, true);
+ page_add_anon_rmap(new, vma, mmun_start, RMAP_COMPOUND);
else
page_add_file_rmap(new, vma, true);
set_pmd_at(mm, mmun_start, pvmw->pmd, pmde);
--- a/mm/ksm.c~mm-rmap-remove-do_page_add_anon_rmap
+++ a/mm/ksm.c
@@ -1150,7 +1150,7 @@ static int replace_page(struct vm_area_s
*/
if (!is_zero_pfn(page_to_pfn(kpage))) {
get_page(kpage);
- page_add_anon_rmap(kpage, vma, addr, false);
+ page_add_anon_rmap(kpage, vma, addr, RMAP_NONE);
newpte = mk_pte(kpage, vma->vm_page_prot);
} else {
newpte = pte_mkspecial(pfn_pte(page_to_pfn(kpage),
--- a/mm/memory.c~mm-rmap-remove-do_page_add_anon_rmap
+++ a/mm/memory.c
@@ -725,7 +725,7 @@ static void restore_exclusive_pte(struct
* created when the swap entry was made.
*/
if (PageAnon(page))
- page_add_anon_rmap(page, vma, address, false);
+ page_add_anon_rmap(page, vma, address, RMAP_NONE);
else
/*
* Currently device exclusive access only supports anonymous
@@ -3701,7 +3701,7 @@ vm_fault_t do_swap_page(struct vm_fault
page_add_new_anon_rmap(page, vma, vmf->address, false);
lru_cache_add_inactive_or_unevictable(page, vma);
} else {
- do_page_add_anon_rmap(page, vma, vmf->address, rmap_flags);
+ page_add_anon_rmap(page, vma, vmf->address, rmap_flags);
}
set_pte_at(vma->vm_mm, vmf->address, vmf->pte, pte);
--- a/mm/migrate.c~mm-rmap-remove-do_page_add_anon_rmap
+++ a/mm/migrate.c
@@ -240,7 +240,8 @@ static bool remove_migration_pte(struct
#endif
{
if (folio_test_anon(folio))
- page_add_anon_rmap(new, vma, pvmw.address, false);
+ page_add_anon_rmap(new, vma, pvmw.address,
+ RMAP_NONE);
else
page_add_file_rmap(new, vma, false);
set_pte_at(vma->vm_mm, pvmw.address, pvmw.pte, pte);
--- a/mm/rmap.c~mm-rmap-remove-do_page_add_anon_rmap
+++ a/mm/rmap.c
@@ -1127,7 +1127,7 @@ static void __page_check_anon_rmap(struc
* @page: the page to add the mapping to
* @vma: the vm area in which the mapping is added
* @address: the user virtual address mapped
- * @compound: charge the page as compound or small page
+ * @flags: the rmap flags
*
* The caller needs to hold the pte lock, and the page must be locked in
* the anon_vma case: to serialize mapping,index checking after setting,
@@ -1135,18 +1135,6 @@ static void __page_check_anon_rmap(struc
* (but PageKsm is never downgraded to PageAnon).
*/
void page_add_anon_rmap(struct page *page,
- struct vm_area_struct *vma, unsigned long address, bool compound)
-{
- do_page_add_anon_rmap(page, vma, address,
- compound ? RMAP_COMPOUND : RMAP_NONE);
-}
-
-/*
- * Special version of the above for do_swap_page, which often runs
- * into pages that are exclusively owned by the current process.
- * Everybody else should continue to use page_add_anon_rmap above.
- */
-void do_page_add_anon_rmap(struct page *page,
struct vm_area_struct *vma, unsigned long address, rmap_t flags)
{
bool compound = flags & RMAP_COMPOUND;
--- a/mm/swapfile.c~mm-rmap-remove-do_page_add_anon_rmap
+++ a/mm/swapfile.c
@@ -1800,7 +1800,7 @@ static int unuse_pte(struct vm_area_stru
inc_mm_counter(vma->vm_mm, MM_ANONPAGES);
get_page(page);
if (page == swapcache) {
- page_add_anon_rmap(page, vma, addr, false);
+ page_add_anon_rmap(page, vma, addr, RMAP_NONE);
} else { /* ksm created a completely new copy */
page_add_new_anon_rmap(page, vma, addr, false);
lru_cache_add_inactive_or_unevictable(page, vma);
_
Patches currently in -mm which might be from david@xxxxxxxxxx are
mm-rmap-fix-missing-swap_free-in-try_to_unmap-after-arch_unmap_one-failed.patch
mm-hugetlb-take-src_mm-write_protect_seq-in-copy_hugetlb_page_range.patch
mm-memory-slightly-simplify-copy_present_pte.patch
mm-rmap-split-page_dup_rmap-into-page_dup_file_rmap-and-page_try_dup_anon_rmap.patch
mm-rmap-convert-rmap-flags-to-a-proper-distinct-rmap_t-type.patch
mm-rmap-remove-do_page_add_anon_rmap.patch
mm-rmap-pass-rmap-flags-to-hugepage_add_anon_rmap.patch
mm-rmap-drop-compound-parameter-from-page_add_new_anon_rmap.patch
mm-rmap-use-page_move_anon_rmap-when-reusing-a-mapped-pageanon-page-exclusively.patch
mm-huge_memory-remove-outdated-vm_warn_on_once_page-from-unmap_page.patch
mm-page-flags-reuse-pg_mappedtodisk-as-pg_anon_exclusive-for-pageanon-pages.patch
mm-remember-exclusively-mapped-anonymous-pages-with-pg_anon_exclusive.patch
mm-gup-disallow-follow_pagefoll_pin.patch
mm-support-gup-triggered-unsharing-of-anonymous-pages.patch
mm-gup-trigger-fault_flag_unshare-when-r-o-pinning-a-possibly-shared-anonymous-page.patch
mm-gup-sanity-check-with-config_debug_vm-that-anonymous-pages-are-exclusive-when-unpinning.patch
mm-swap-remember-pg_anon_exclusive-via-a-swp-pte-bit.patch
mm-debug_vm_pgtable-add-tests-for-__have_arch_pte_swp_exclusive.patch
x86-pgtable-support-__have_arch_pte_swp_exclusive.patch
arm64-pgtable-support-__have_arch_pte_swp_exclusive.patch
s390-pgtable-cleanup-description-of-swp-pte-layout.patch
s390-pgtable-support-__have_arch_pte_swp_exclusive.patch
powerpc-pgtable-remove-_page_bit_swap_type-for-book3s.patch
powerpc-pgtable-support-__have_arch_pte_swp_exclusive-for-book3s.patch
