diff options
| author | Harshad Shirwadkar <harshadshirwadkar@gmail.com> | 2020-11-05 19:58:50 -0800 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2020-11-06 23:01:01 -0500 |
| commit | a44ad6835da52fdf4df2e482f45a167336555121 (patch) | |
| tree | 176af5bf4223b6e1a47b1817fa06fa439c3d0613 /Documentation/filesystems/ext4/journal.rst | |
| parent | 7067b2619017d51e71686ca9756b454de0e5826a (diff) | |
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/journal.rst')
| -rw-r--r-- | Documentation/filesystems/ext4/journal.rst | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/filesystems/ext4/journal.rst b/Documentation/filesystems/ext4/journal.rst index 805a1e9ea3a5..849d5b119eb8 100644 --- a/Documentation/filesystems/ext4/journal.rst +++ b/Documentation/filesystems/ext4/journal.rst @@ -256,6 +256,10 @@ which is 1024 bytes long: - s\_padding2 - * - 0x54 + - \_\_be32 + - s\_num\_fc\_blocks + - Number of fast commit blocks in the journal. + * - 0x58 - \_\_u32 - s\_padding[42] - @@ -310,6 +314,8 @@ The journal incompat features are any combination of the following: - This journal uses v3 of the checksum on-disk format. This is the same as v2, but the journal block tag size is fixed regardless of the size of block numbers. (JBD2\_FEATURE\_INCOMPAT\_CSUM\_V3) + * - 0x20 + - Journal has fast commit blocks. (JBD2\_FEATURE\_INCOMPAT\_FAST\_COMMIT) .. _jbd2_checksum_type: |