From: David Hildenbrand <david@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: Andrew Morton <akpm@linux-foundation.org>,
Hugh Dickins <hughd@google.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
David Rientjes <rientjes@google.com>,
Shakeel Butt <shakeelb@google.com>,
John Hubbard <jhubbard@nvidia.com>,
Jason Gunthorpe <jgg@nvidia.com>,
Mike Kravetz <mike.kravetz@oracle.com>,
Mike Rapoport <rppt@linux.ibm.com>,
Yang Shi <shy828301@gmail.com>,
"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
Matthew Wilcox <willy@infradead.org>,
Vlastimil Babka <vbabka@suse.cz>, Jann Horn <jannh@google.com>,
Michal Hocko <mhocko@kernel.org>, Nadav Amit <namit@vmware.com>,
Rik van Riel <riel@surriel.com>, Roman Gushchin <guro@fb.com>,
Andrea Arcangeli <aarcange@redhat.com>,
Peter Xu <peterx@redhat.com>, Donald Dutile <ddutile@redhat.com>,
Christoph Hellwig <hch@lst.de>, Oleg Nesterov <oleg@redhat.com>,
Jan Kara <jack@suse.cz>, Liang Zhang <zhangliang5@huawei.com>,
Pedro Gomes <pedrodemargomes@gmail.com>,
Oded Gabbay <oded.gabbay@gmail.com>,
linux-mm@kvack.org, David Hildenbrand <david@redhat.com>
Subject: [PATCH v2 06/15] mm/rmap: remove do_page_add_anon_rmap()
Date: Tue, 15 Mar 2022 11:47:32 +0100 [thread overview]
Message-ID: <20220315104741.63071-7-david@redhat.com> (raw)
In-Reply-To: <20220315104741.63071-1-david@redhat.com>
... 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.
Signed-off-by: David Hildenbrand <david@redhat.com>
---
include/linux/rmap.h | 4 +---
mm/huge_memory.c | 2 +-
mm/ksm.c | 2 +-
mm/memory.c | 2 +-
mm/migrate.c | 3 ++-
mm/rmap.c | 14 +-------------
mm/swapfile.c | 2 +-
7 files changed, 8 insertions(+), 21 deletions(-)
diff --git a/include/linux/rmap.h b/include/linux/rmap.h
index 49f6b208938c..a269f80fbeef 100644
--- a/include/linux/rmap.h
+++ b/include/linux/rmap.h
@@ -181,9 +181,7 @@ 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, bool);
-void do_page_add_anon_rmap(struct page *, struct vm_area_struct *,
- unsigned long, rmap_t);
+ unsigned long, rmap_t);
void page_add_new_anon_rmap(struct page *, struct vm_area_struct *,
unsigned long, bool);
void page_add_file_rmap(struct page *, bool);
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index c126d728b8de..2ca137e01e84 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -3115,7 +3115,7 @@ void remove_migration_pmd(struct page_vma_mapped_walk *pvmw, struct page *new)
flush_cache_range(vma, mmun_start, mmun_start + HPAGE_PMD_SIZE);
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, true);
set_pmd_at(mm, mmun_start, pvmw->pmd, pmde);
diff --git a/mm/ksm.c b/mm/ksm.c
index c20bd4d9a0d9..9ff28097bc0a 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -1153,7 +1153,7 @@ static int replace_page(struct vm_area_struct *vma, struct page *page,
*/
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),
diff --git a/mm/memory.c b/mm/memory.c
index bbce3ca72974..e2d8e55c55c0 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -3709,7 +3709,7 @@ vm_fault_t do_swap_page(struct vm_fault *vmf)
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);
diff --git a/mm/migrate.c b/mm/migrate.c
index 524c2648ab36..907052b72581 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -246,7 +246,8 @@ static bool remove_migration_pte(struct page *page, struct vm_area_struct *vma,
#endif
{
if (PageAnon(new))
- 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, false);
set_pte_at(vma->vm_mm, pvmw.address, pvmw.pte, pte);
diff --git a/mm/rmap.c b/mm/rmap.c
index 3d7028d100ea..97bcc50c3489 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -1129,7 +1129,7 @@ static void __page_check_anon_rmap(struct page *page,
* @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,
@@ -1137,18 +1137,6 @@ static void __page_check_anon_rmap(struct page *page,
* (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;
diff --git a/mm/swapfile.c b/mm/swapfile.c
index a5183315dc58..41ba8238d16b 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -1800,7 +1800,7 @@ static int unuse_pte(struct vm_area_struct *vma, pmd_t *pmd,
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);
--
2.35.1
next prev parent reply other threads:[~2022-03-15 10:50 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-15 10:47 [PATCH v2 00/15] mm: COW fixes part 2: reliable GUP pins of anonymous pages David Hildenbrand
2022-03-15 10:47 ` [PATCH v2 01/15] mm/rmap: fix missing swap_free() in try_to_unmap() after arch_unmap_one() failed David Hildenbrand
2022-03-29 13:59 ` David Hildenbrand
2022-03-29 20:42 ` Khalid Aziz
2022-03-29 20:55 ` David Hildenbrand
2022-03-30 17:04 ` Khalid Aziz
2022-03-31 13:46 ` David Hildenbrand
2022-03-15 10:47 ` [PATCH v2 02/15] mm/hugetlb: take src_mm->write_protect_seq in copy_hugetlb_page_range() David Hildenbrand
2022-03-15 10:47 ` [PATCH v2 03/15] mm/memory: slightly simplify copy_present_pte() David Hildenbrand
2022-03-15 10:47 ` [PATCH v2 04/15] mm/rmap: split page_dup_rmap() into page_dup_file_rmap() and page_try_dup_anon_rmap() David Hildenbrand
2022-03-16 20:02 ` Yang Shi
2022-03-17 9:00 ` David Hildenbrand
2022-03-15 10:47 ` [PATCH v2 05/15] mm/rmap: convert RMAP flags to a proper distinct rmap_t type David Hildenbrand
2022-03-15 10:47 ` David Hildenbrand [this message]
2022-03-15 10:47 ` [PATCH v2 07/15] mm/rmap: pass rmap flags to hugepage_add_anon_rmap() David Hildenbrand
2022-03-15 10:47 ` [PATCH v2 08/15] mm/rmap: drop "compound" parameter from page_add_new_anon_rmap() David Hildenbrand
2022-03-15 10:47 ` [PATCH v2 09/15] mm/rmap: use page_move_anon_rmap() when reusing a mapped PageAnon() page exclusively David Hildenbrand
2022-03-15 10:47 ` [PATCH v2 10/15] mm/page-flags: reuse PG_mappedtodisk as PG_anon_exclusive for PageAnon() pages David Hildenbrand
2022-03-15 10:47 ` [PATCH v2 11/15] mm: remember exclusively mapped anonymous pages with PG_anon_exclusive David Hildenbrand
2022-03-16 21:23 ` Yang Shi
2022-03-17 9:06 ` David Hildenbrand
2022-03-18 20:29 ` Yang Shi
2022-03-19 10:21 ` David Hildenbrand
2022-03-19 10:50 ` David Hildenbrand
2022-03-21 20:56 ` Yang Shi
2022-03-22 9:41 ` David Hildenbrand
2022-03-21 20:51 ` Yang Shi
2022-03-15 10:47 ` [PATCH v2 12/15] mm/gup: disallow follow_page(FOLL_PIN) David Hildenbrand
2022-03-15 10:47 ` [PATCH v2 13/15] mm: support GUP-triggered unsharing of anonymous pages David Hildenbrand
2022-03-18 23:30 ` Jason Gunthorpe
2022-03-21 16:15 ` David Hildenbrand
2022-03-21 16:18 ` Jason Gunthorpe
2022-03-21 16:24 ` David Hildenbrand
2022-03-15 10:47 ` [PATCH v2 14/15] mm/gup: trigger FAULT_FLAG_UNSHARE when R/O-pinning a possibly shared anonymous page David Hildenbrand
2022-03-15 10:47 ` [PATCH v2 15/15] mm/gup: sanity-check with CONFIG_DEBUG_VM that anonymous pages are exclusive when (un)pinning David Hildenbrand
2022-03-18 23:35 ` Jason Gunthorpe
2022-03-19 10:22 ` David Hildenbrand
2022-03-18 23:36 ` [PATCH v2 00/15] mm: COW fixes part 2: reliable GUP pins of anonymous pages Jason Gunthorpe
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