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| author | Harshad Shirwadkar <harshadshirwadkar@gmail.com> | 2020-11-06 06:58:50 +0300 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2020-11-07 07:01:01 +0300 |
| commit | a44ad6835da52fdf4df2e482f45a167336555121 (patch) | |
| tree | 176af5bf4223b6e1a47b1817fa06fa439c3d0613 /Documentation/filesystems/ext4/super.rst | |
| parent | 7067b2619017d51e71686ca9756b454de0e5826a (diff) | |
| download | linux-a44ad6835da52fdf4df2e482f45a167336555121.tar.xz | |
ext4: describe fast_commit feature flags
Fast commit feature has flags in the file system as well in JBD2. The
meaning of fast commit feature flags can get confusing. Update docs
and code to add more documentation about it.
Suggested-by: Jan Kara <jack@suse.cz>
Signed-off-by: Harshad Shirwadkar <harshadshirwadkar@gmail.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20201106035911.1942128-2-harshadshirwadkar@gmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'Documentation/filesystems/ext4/super.rst')
| -rw-r--r-- | Documentation/filesystems/ext4/super.rst | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/filesystems/ext4/super.rst b/Documentation/filesystems/ext4/super.rst index 93e55d7c1d40..2eb1ab20498d 100644 --- a/Documentation/filesystems/ext4/super.rst +++ b/Documentation/filesystems/ext4/super.rst @@ -596,6 +596,13 @@ following: - Sparse Super Block, v2. If this flag is set, the SB field s\_backup\_bgs points to the two block groups that contain backup superblocks (COMPAT\_SPARSE\_SUPER2). + * - 0x400 + - Fast commits supported. Although fast commits blocks are + backward incompatible, fast commit blocks are not always + present in the journal. If fast commit blocks are present in + the journal, JBD2 incompat feature + (JBD2\_FEATURE\_INCOMPAT\_FAST\_COMMIT) gets + set (COMPAT\_FAST\_COMMIT). .. _super_incompat: |