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| author | Theodore Ts'o <tytso@mit.edu> | 2010-06-12 05:14:04 +0200 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2010-06-12 05:14:04 +0200 |
| commit | a0375156ca1041574b5d47cc7e32f10b891151b0 (patch) | |
| tree | b791961012b9348f289c3dda5dc071bdf9b736d2 /fs/ext4/xattr.c | |
| parent | Linux 2.6.35-rc3 (diff) | |
| download | linux-a0375156ca1041574b5d47cc7e32f10b891151b0.tar.xz linux-a0375156ca1041574b5d47cc7e32f10b891151b0.zip | |
ext4: Clean up s_dirt handling
We don't need to set s_dirt in most of the ext4 code when journaling
is enabled. In ext3/4 some of the summary statistics for # of free
inodes, blocks, and directories are calculated from the per-block
group statistics when the file system is mounted or unmounted. As a
result the superblock doesn't have to be updated, either via the
journal or by setting s_dirt. There are a few exceptions, most
notably when resizing the file system, where the superblock needs to
be modified --- and in that case it should be done as a journalled
operation if possible, and s_dirt set only in no-journal mode.
This patch will optimize out some unneeded disk writes when using ext4
with a journal.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/xattr.c')
| -rw-r--r-- | fs/ext4/xattr.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c index 04338009793a..a6f314249574 100644 --- a/fs/ext4/xattr.c +++ b/fs/ext4/xattr.c @@ -458,8 +458,7 @@ static void ext4_xattr_update_super_block(handle_t *handle, if (ext4_journal_get_write_access(handle, EXT4_SB(sb)->s_sbh) == 0) { EXT4_SET_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_EXT_ATTR); - sb->s_dirt = 1; - ext4_handle_dirty_metadata(handle, NULL, EXT4_SB(sb)->s_sbh); + ext4_handle_dirty_super(handle, sb); } } |