diff options
| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2022-06-06 09:00:16 -0400 |
|---|---|---|
| committer | Matthew Wilcox (Oracle) <willy@infradead.org> | 2022-08-02 12:34:03 -0400 |
| commit | 5490da4f06d182ba944706875029e98fe7f6b821 (patch) | |
| tree | 4c42a8c208db20df8f41ae2155d146f796c63670 /Documentation/filesystems | |
| parent | 68f2736a858324c3ec852f6c2cddd9d1c777357d (diff) | |
fs: Add aops->migrate_folio
Provide a folio-based replacement for aops->migratepage. Update the
documentation to document migrate_folio instead of migratepage.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'Documentation/filesystems')
| -rw-r--r-- | Documentation/filesystems/locking.rst | 5 | ||||
| -rw-r--r-- | Documentation/filesystems/vfs.rst | 14 |
2 files changed, 10 insertions, 9 deletions
diff --git a/Documentation/filesystems/locking.rst b/Documentation/filesystems/locking.rst index 9963d9600b71..4bb2627026ec 100644 --- a/Documentation/filesystems/locking.rst +++ b/Documentation/filesystems/locking.rst @@ -252,7 +252,8 @@ prototypes:: bool (*release_folio)(struct folio *, gfp_t); void (*free_folio)(struct folio *); int (*direct_IO)(struct kiocb *, struct iov_iter *iter); - int (*migratepage)(struct address_space *, struct page *, struct page *); + int (*migrate_folio)(struct address_space *, struct folio *dst, + struct folio *src, enum migrate_mode); int (*launder_folio)(struct folio *); bool (*is_partially_uptodate)(struct folio *, size_t from, size_t count); int (*error_remove_page)(struct address_space *, struct page *); @@ -278,7 +279,7 @@ invalidate_folio: yes exclusive release_folio: yes free_folio: yes direct_IO: -migratepage: yes (both) +migrate_folio: yes (both) launder_folio: yes is_partially_uptodate: yes error_remove_page: yes diff --git a/Documentation/filesystems/vfs.rst b/Documentation/filesystems/vfs.rst index b51665cdabc4..6cd6953e175b 100644 --- a/Documentation/filesystems/vfs.rst +++ b/Documentation/filesystems/vfs.rst @@ -737,8 +737,8 @@ cache in your filesystem. The following members are defined: bool (*release_folio)(struct folio *, gfp_t); void (*free_folio)(struct folio *); ssize_t (*direct_IO)(struct kiocb *, struct iov_iter *iter); - /* migrate the contents of a page to the specified target */ - int (*migratepage) (struct page *, struct page *); + int (*migrate_folio)(struct mapping *, struct folio *dst, + struct folio *src, enum migrate_mode); int (*launder_folio) (struct folio *); bool (*is_partially_uptodate) (struct folio *, size_t from, @@ -926,12 +926,12 @@ cache in your filesystem. The following members are defined: data directly between the storage and the application's address space. -``migrate_page`` +``migrate_folio`` This is used to compact the physical memory usage. If the VM - wants to relocate a page (maybe off a memory card that is - signalling imminent failure) it will pass a new page and an old - page to this function. migrate_page should transfer any private - data across and update any references that it has to the page. + wants to relocate a folio (maybe from a memory device that is + signalling imminent failure) it will pass a new folio and an old + folio to this function. migrate_folio should transfer any private + data across and update any references that it has to the folio. ``launder_folio`` Called before freeing a folio - it writes back the dirty folio. |