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| author | Theodore Ts'o <tytso@mit.edu> | 2009-05-18 05:31:23 +0200 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2009-05-18 05:31:23 +0200 |
| commit | 0568c518937ee3a9b6a94d18bae9c150fe5d6832 (patch) | |
| tree | b6392f24142e9199a7a0b34e29ac2f6c82a221d7 | |
| parent | ext4: Add a comprehensive block validity check to ext4_get_blocks() (diff) | |
| download | linux-0568c518937ee3a9b6a94d18bae9c150fe5d6832.tar.xz linux-0568c518937ee3a9b6a94d18bae9c150fe5d6832.zip | |
ext4: down i_data_sem only for read when walking tree for fiemap
Not sure why I put this in as down_write originally; all we are
doing is walking the tree, nothing will change under us and
concurrent reads should be no problem.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
| -rw-r--r-- | fs/ext4/extents.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index d04b779b780e..d4e99e96fddb 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -3312,10 +3312,10 @@ int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, * Walk the extent tree gathering extent information. * ext4_ext_fiemap_cb will push extents back to user. */ - down_write(&EXT4_I(inode)->i_data_sem); + down_read(&EXT4_I(inode)->i_data_sem); error = ext4_ext_walk_space(inode, start_blk, len_blks, ext4_ext_fiemap_cb, fieinfo); - up_write(&EXT4_I(inode)->i_data_sem); + up_read(&EXT4_I(inode)->i_data_sem); } return error; |