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Message-Id: <20220608150249.3033815-17-willy@infradead.org>
Date: Wed, 8 Jun 2022 16:02:46 +0100
From: "Matthew Wilcox (Oracle)" <willy@...radead.org>
To: linux-fsdevel@...r.kernel.org
Cc: "Matthew Wilcox (Oracle)" <willy@...radead.org>,
linux-kernel@...r.kernel.org, linux-block@...r.kernel.org,
linux-aio@...ck.org, linux-btrfs@...r.kernel.org,
linux-ext4@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net,
cluster-devel@...hat.com, linux-mm@...ck.org,
linux-xfs@...r.kernel.org, linux-nfs@...r.kernel.org,
linux-ntfs-dev@...ts.sourceforge.net, ocfs2-devel@....oracle.com,
linux-mtd@...ts.infradead.org,
virtualization@...ts.linux-foundation.org
Subject: [PATCH v2 16/19] hugetlb: Convert to migrate_folio
This involves converting migrate_huge_page_move_mapping(). We also need a
folio variant of hugetlb_set_page_subpool(), but that's for a later patch.
Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org>
---
fs/hugetlbfs/inode.c | 23 ++++++++++++++---------
include/linux/migrate.h | 6 +++---
mm/migrate.c | 18 +++++++++---------
3 files changed, 26 insertions(+), 21 deletions(-)
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 14d33f725e05..eca1d0fabd7e 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -954,28 +954,33 @@ static int hugetlbfs_symlink(struct user_namespace *mnt_userns,
return error;
}
-static int hugetlbfs_migrate_page(struct address_space *mapping,
- struct page *newpage, struct page *page,
+#ifdef CONFIG_MIGRATION
+static int hugetlbfs_migrate_folio(struct address_space *mapping,
+ struct folio *dst, struct folio *src,
enum migrate_mode mode)
{
int rc;
- rc = migrate_huge_page_move_mapping(mapping, newpage, page);
+ rc = migrate_huge_page_move_mapping(mapping, dst, src);
if (rc != MIGRATEPAGE_SUCCESS)
return rc;
- if (hugetlb_page_subpool(page)) {
- hugetlb_set_page_subpool(newpage, hugetlb_page_subpool(page));
- hugetlb_set_page_subpool(page, NULL);
+ if (hugetlb_page_subpool(&src->page)) {
+ hugetlb_set_page_subpool(&dst->page,
+ hugetlb_page_subpool(&src->page));
+ hugetlb_set_page_subpool(&src->page, NULL);
}
if (mode != MIGRATE_SYNC_NO_COPY)
- migrate_page_copy(newpage, page);
+ folio_migrate_copy(dst, src);
else
- migrate_page_states(newpage, page);
+ folio_migrate_flags(dst, src);
return MIGRATEPAGE_SUCCESS;
}
+#else
+#define hugetlbfs_migrate_folio NULL
+#endif
static int hugetlbfs_error_remove_page(struct address_space *mapping,
struct page *page)
@@ -1142,7 +1147,7 @@ static const struct address_space_operations hugetlbfs_aops = {
.write_begin = hugetlbfs_write_begin,
.write_end = hugetlbfs_write_end,
.dirty_folio = noop_dirty_folio,
- .migratepage = hugetlbfs_migrate_page,
+ .migrate_folio = hugetlbfs_migrate_folio,
.error_remove_page = hugetlbfs_error_remove_page,
};
diff --git a/include/linux/migrate.h b/include/linux/migrate.h
index 82f00ad69a54..59d64a1e6b4b 100644
--- a/include/linux/migrate.h
+++ b/include/linux/migrate.h
@@ -42,8 +42,8 @@ extern int isolate_movable_page(struct page *page, isolate_mode_t mode);
extern void migrate_page_states(struct page *newpage, struct page *page);
extern void migrate_page_copy(struct page *newpage, struct page *page);
-extern int migrate_huge_page_move_mapping(struct address_space *mapping,
- struct page *newpage, struct page *page);
+int migrate_huge_page_move_mapping(struct address_space *mapping,
+ struct folio *dst, struct folio *src);
extern int migrate_page_move_mapping(struct address_space *mapping,
struct page *newpage, struct page *page, int extra_count);
void migration_entry_wait_on_locked(swp_entry_t entry, pte_t *ptep,
@@ -74,7 +74,7 @@ static inline void migrate_page_copy(struct page *newpage,
struct page *page) {}
static inline int migrate_huge_page_move_mapping(struct address_space *mapping,
- struct page *newpage, struct page *page)
+ struct folio *dst, struct folio *src)
{
return -ENOSYS;
}
diff --git a/mm/migrate.c b/mm/migrate.c
index 4d8115ca93bb..bed0de86f3ae 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -474,26 +474,26 @@ EXPORT_SYMBOL(folio_migrate_mapping);
* of folio_migrate_mapping().
*/
int migrate_huge_page_move_mapping(struct address_space *mapping,
- struct page *newpage, struct page *page)
+ struct folio *dst, struct folio *src)
{
- XA_STATE(xas, &mapping->i_pages, page_index(page));
+ XA_STATE(xas, &mapping->i_pages, folio_index(src));
int expected_count;
xas_lock_irq(&xas);
- expected_count = 2 + page_has_private(page);
- if (!page_ref_freeze(page, expected_count)) {
+ expected_count = 2 + folio_has_private(src);
+ if (!folio_ref_freeze(src, expected_count)) {
xas_unlock_irq(&xas);
return -EAGAIN;
}
- newpage->index = page->index;
- newpage->mapping = page->mapping;
+ dst->index = src->index;
+ dst->mapping = src->mapping;
- get_page(newpage);
+ folio_get(dst);
- xas_store(&xas, newpage);
+ xas_store(&xas, dst);
- page_ref_unfreeze(page, expected_count - 1);
+ folio_ref_unfreeze(src, expected_count - 1);
xas_unlock_irq(&xas);
--
2.35.1
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