diff options
| author |   Harshad Shirwadkar <harshadshirwadkar@gmail.com> | 2020-11-05 19:58:54 -0800 |
|---|---|---|
| committer |   Theodore Ts'o <tytso@mit.edu> | 2020-11-06 23:01:02 -0500 |
| commit | ede7dc7fa0af619afc08995776eadb9ff3b0a711 (patch) | |
| tree | d1a6596d27bca10f74edfa11fa4ae287c24147d8 /include/linux/jbd2.h | |
| parent | ext4: fixup ext4_fc_track_* functions' signature (diff) | |
| download | wireguard-linux-ede7dc7fa0af619afc08995776eadb9ff3b0a711.tar.xz wireguard-linux-ede7dc7fa0af619afc08995776eadb9ff3b0a711.zip | |
jbd2: rename j_maxlen to j_total_len and add jbd2_journal_max_txn_bufs
The on-disk superblock field sb->s_maxlen represents the total size of
the journal including the fast commit area and is no more the max
number of blocks available for a transaction. The maximum number of
blocks available to a transaction is reduced by the number of fast
commit blocks. So, this patch renames j_maxlen to j_total_len to
better represent its intent. Also, it adds a function to calculate max
number of bufs available for a transaction.
Suggested-by: Jan Kara <jack@suse.cz>
Signed-off-by: Harshad Shirwadkar <harshadshirwadkar@gmail.com>
Link: https://lore.kernel.org/r/20201106035911.1942128-6-harshadshirwadkar@gmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'include/linux/jbd2.h')
| -rw-r--r-- | include/linux/jbd2.h | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h index 1d5566af48ac..e0b6b53eae64 100644 --- a/include/linux/jbd2.h +++ b/include/linux/jbd2.h @@ -988,9 +988,9 @@ struct journal_s struct block_device *j_fs_dev; /** - * @j_maxlen: Total maximum capacity of the journal region on disk. + * @j_total_len: Total maximum capacity of the journal region on disk. */ - unsigned int j_maxlen; + unsigned int j_total_len; /** * @j_reserved_credits: @@ -1624,6 +1624,11 @@ int jbd2_wait_inode_data(journal_t *journal, struct jbd2_inode *jinode); int jbd2_fc_wait_bufs(journal_t *journal, int num_blks); int jbd2_fc_release_bufs(journal_t *journal); +static inline int jbd2_journal_get_max_txn_bufs(journal_t *journal) +{ + return (journal->j_total_len - journal->j_fc_wbufsize) / 4; +} + /* * is_journal_abort * |