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 07/15] mm/rmap: pass rmap flags to hugepage_add_anon_rmap()
Date: Tue, 15 Mar 2022 11:47:33 +0100 [thread overview]
Message-ID: <20220315104741.63071-8-david@redhat.com> (raw)
In-Reply-To: <20220315104741.63071-1-david@redhat.com>
Let's prepare for passing RMAP_EXCLUSIVE, similarly as we do for
page_add_anon_rmap() now. RMAP_COMPOUND is implicit for hugetlb
pages and ignored.
Signed-off-by: David Hildenbrand <david@redhat.com>
---
include/linux/rmap.h | 2 +-
mm/migrate.c | 3 ++-
mm/rmap.c | 9 ++++++---
3 files changed, 9 insertions(+), 5 deletions(-)
diff --git a/include/linux/rmap.h b/include/linux/rmap.h
index a269f80fbeef..94ee38829c63 100644
--- a/include/linux/rmap.h
+++ b/include/linux/rmap.h
@@ -188,7 +188,7 @@ void page_add_file_rmap(struct page *, bool);
void page_remove_rmap(struct page *, bool);
void hugepage_add_anon_rmap(struct page *, struct vm_area_struct *,
- unsigned long);
+ unsigned long, rmap_t);
void hugepage_add_new_anon_rmap(struct page *, struct vm_area_struct *,
unsigned long);
diff --git a/mm/migrate.c b/mm/migrate.c
index 907052b72581..e6b3cb3d148b 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -238,7 +238,8 @@ static bool remove_migration_pte(struct page *page, struct vm_area_struct *vma,
pte = pte_mkhuge(pte);
pte = arch_make_huge_pte(pte, shift, vma->vm_flags);
if (PageAnon(new))
- hugepage_add_anon_rmap(new, vma, pvmw.address);
+ hugepage_add_anon_rmap(new, vma, pvmw.address,
+ RMAP_NONE);
else
page_dup_file_rmap(new, true);
set_huge_pte_at(vma->vm_mm, pvmw.address, pvmw.pte, pte);
diff --git a/mm/rmap.c b/mm/rmap.c
index 97bcc50c3489..7162689203fc 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -2409,9 +2409,11 @@ void rmap_walk_locked(struct page *page, struct rmap_walk_control *rwc)
* The following two functions are for anonymous (private mapped) hugepages.
* Unlike common anonymous pages, anonymous hugepages have no accounting code
* and no lru code, because we handle hugepages differently from common pages.
+ *
+ * RMAP_COMPOUND is ignored.
*/
-void hugepage_add_anon_rmap(struct page *page,
- struct vm_area_struct *vma, unsigned long address)
+void hugepage_add_anon_rmap(struct page *page, struct vm_area_struct *vma,
+ unsigned long address, rmap_t flags)
{
struct anon_vma *anon_vma = vma->anon_vma;
int first;
@@ -2421,7 +2423,8 @@ void hugepage_add_anon_rmap(struct page *page,
/* address might be in next vma when migration races vma_adjust */
first = atomic_inc_and_test(compound_mapcount_ptr(page));
if (first)
- __page_set_anon_rmap(page, vma, address, 0);
+ __page_set_anon_rmap(page, vma, address,
+ flags & RMAP_EXCLUSIVE);
}
void hugepage_add_new_anon_rmap(struct page *page,
--
2.35.1
next prev parent reply other threads:[~2022-03-15 10:52 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 ` [PATCH v2 06/15] mm/rmap: remove do_page_add_anon_rmap() David Hildenbrand
2022-03-15 10:47 ` David Hildenbrand [this message]
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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