diff options
| author | Christoph Hellwig <hch@lst.de> | 2023-05-03 17:24:40 +0200 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2023-06-19 13:59:28 +0200 |
| commit | d7172f52e9933b6ec9305e7fe6e829e3939dba04 (patch) | |
| tree | 62101cc94eccc2825aa1c6ac82c6a5340e65dfa4 /fs/btrfs/extent_io.h | |
| parent | 9e2aff90fc2ad2b94933762f5442fef9ee7a692e (diff) | |
btrfs: use per-buffer locking for extent_buffer reading
Instead of locking and unlocking every page or the extent, just add a
new EXTENT_BUFFER_READING bit that mirrors EXTENT_BUFFER_WRITEBACK
for synchronizing threads trying to read an extent_buffer and to wait
for I/O completion.
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: David Sterba <dsterba@suse.com>
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, 2 insertions, 0 deletions
diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h index 217c433bb999..2d91ca91dca5 100644 --- a/fs/btrfs/extent_io.h +++ b/fs/btrfs/extent_io.h @@ -29,6 +29,8 @@ enum { /* write IO error */ EXTENT_BUFFER_WRITE_ERR, EXTENT_BUFFER_NO_CHECK, + /* Indicate that extent buffer pages a being read */ + EXTENT_BUFFER_READING, }; /* these are flags for __process_pages_contig */ |