diff options
| author | Zheng Liu <wenqing.lz@taobao.com> | 2014-11-25 11:44:37 -0500 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2014-11-25 11:44:37 -0500 |
| commit | 2f8e0a7c6c89f850ebd5d6c0b9a08317030d1b89 (patch) | |
| tree | 4e03e95c516bab8be44e23861626f0c0f29a3958 /fs/ext4/inode.c | |
| parent | cbd7584e6ead1b79fb0b81573f158b57fa1f0b49 (diff) | |
ext4: cache extent hole in extent status tree for ext4_da_map_blocks()
Currently extent status tree doesn't cache extent hole when a write
looks up in extent tree to make sure whether a block has been allocated
or not. In this case, we don't put extent hole in extent cache because
later this extent might be removed and a new delayed extent might be
added back. But it will cause a defect when we do a lot of writes. If
we don't put extent hole in extent cache, the following writes also need
to access extent tree to look at whether or not a block has been
allocated. It brings a cache miss. This commit fixes this defect.
Also if the inode doesn't have any extent, this extent hole will be
cached as well.
Cc: Andreas Dilger <adilger.kernel@dilger.ca>
Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/inode.c')
| -rw-r--r-- | fs/ext4/inode.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 2315e45161ee..d5a46a8df70b 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -1432,11 +1432,9 @@ static int ext4_da_map_blocks(struct inode *inode, sector_t iblock, if (ext4_has_inline_data(inode)) retval = 0; else if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) - retval = ext4_ext_map_blocks(NULL, inode, map, - EXT4_GET_BLOCKS_NO_PUT_HOLE); + retval = ext4_ext_map_blocks(NULL, inode, map, 0); else - retval = ext4_ind_map_blocks(NULL, inode, map, - EXT4_GET_BLOCKS_NO_PUT_HOLE); + retval = ext4_ind_map_blocks(NULL, inode, map, 0); add_delayed: if (retval == 0) { |