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authorTheodore Ts'o <tytso@mit.edu>2010-06-11 23:14:04 -0400
committerTheodore Ts'o <tytso@mit.edu>2010-06-11 23:14:04 -0400
commita0375156ca1041574b5d47cc7e32f10b891151b0 (patch)
treeb791961012b9348f289c3dda5dc071bdf9b736d2 /fs/ext4/file.c
parent7e27d6e778cd87b6f2415515d7127eba53fe5d02 (diff)
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/file.c')
-rw-r--r--fs/ext4/file.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 5313ae4cda2d..bd411c12d63d 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -123,7 +123,7 @@ static int ext4_file_open(struct inode * inode, struct file * filp)
if (!IS_ERR(cp)) {
memcpy(sbi->s_es->s_last_mounted, cp,
sizeof(sbi->s_es->s_last_mounted));
- sb->s_dirt = 1;
+ ext4_mark_super_dirty(sb);
}
}
return dquot_file_open(inode, filp);