| commit | b436b9bef84de6893e86346d8fbf7104bc520645 | |
| author | Jan Kara <jack@suse.cz> | |
| Wed, 9 Dec 2009 04:51:10 +0000 (8 23:51 -0500) | ||
| committer | Theodore Ts'o <tytso@mit.edu> | |
| Wed, 9 Dec 2009 04:51:10 +0000 (8 23:51 -0500) | ||
| tree | 50fb9ae167bcd622e9adf47646bcf3b4c7dd111d | treesnapshot (tar.gz zip) |
| parent | 194074acacebc169ded90a4657193f5180015051 | commitdiff |
ext4: Wait for proper transaction commit on fsync
We cannot rely on buffer dirty bits during fsync because pdflush can come
before fsync is called and clear dirty bits without forcing a transaction
commit. What we do is that we track which transaction has last changed
the inode and which transaction last changed allocation and force it to
disk on fsync.
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
We cannot rely on buffer dirty bits during fsync because pdflush can come
before fsync is called and clear dirty bits without forcing a transaction
commit. What we do is that we track which transaction has last changed
the inode and which transaction last changed allocation and force it to
disk on fsync.
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>