diff options
| author | Nikolay Borisov <nborisov@suse.com> | 2018-06-27 16:38:24 +0300 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2018-08-06 13:12:55 +0200 |
| commit | b0132a3be5daf84116833542717ff5692f51640e (patch) | |
| tree | 001e55d66b406327b31e8844f3ecd0c86e046c93 /fs/btrfs/extent_io.h | |
| parent | 07e21c4dad42be8d2a6b8cd0b98cf8e6931e12fd (diff) | |
btrfs: Rename EXTENT_BUFFER_DUMMY to EXTENT_BUFFER_UNMAPPED
EXTENT_BUFFER_DUMMY is an awful name for this flag. Buffers which have
this flag set are not in any way dummy. Rather, they are private in the
sense that are not mapped and linked to the global buffer tree. This
flag has subtle implications to the way free_extent_buffer works for
example, as well as controls whether page->mapping->private_lock is held
during extent_buffer release. Pages for an unmapped buffer cannot be
under io, nor can they be written by a 3rd party so taking the lock is
unnecessary.
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ EXTENT_BUFFER_UNMAPPED, update changelog ]
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/extent_io.h')
| -rw-r--r-- | fs/btrfs/extent_io.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h index 48f1ee9ad379..0ecc13b7d6f7 100644 --- a/fs/btrfs/extent_io.h +++ b/fs/btrfs/extent_io.h @@ -46,7 +46,7 @@ #define EXTENT_BUFFER_STALE 6 #define EXTENT_BUFFER_WRITEBACK 7 #define EXTENT_BUFFER_READ_ERR 8 /* read IO error */ -#define EXTENT_BUFFER_DUMMY 9 +#define EXTENT_BUFFER_UNMAPPED 9 #define EXTENT_BUFFER_IN_TREE 10 #define EXTENT_BUFFER_WRITE_ERR 11 /* write IO error */ |