diff options
| author | Theodore Ts'o <tytso@mit.edu> | 2010-08-03 21:35:12 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2010-08-03 21:35:12 -0400 |
| commit | a931da6ac9331a6c80dd91c199105806f2336188 (patch) | |
| tree | 2d4ea766def9a98d21c2379f41e796b0e57ccd6b /fs/ext4/super.c | |
| parent | a51dca9cd3bb4ec5a05bfb6feabf024a5c808a37 (diff) | |
jbd2: Change j_state_lock to be a rwlock_t
Lockstat reports have shown that j_state_lock is a major source of
lock contention, especially on systems with more than 4 CPU cores. So
change it to be a read/write spinlock.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/super.c')
| -rw-r--r-- | fs/ext4/super.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 3fd65eb66cc..81cb3fc1218 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -3232,7 +3232,7 @@ static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) journal->j_min_batch_time = sbi->s_min_batch_time; journal->j_max_batch_time = sbi->s_max_batch_time; - spin_lock(&journal->j_state_lock); + write_lock(&journal->j_state_lock); if (test_opt(sb, BARRIER)) journal->j_flags |= JBD2_BARRIER; else @@ -3241,7 +3241,7 @@ static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; else journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; - spin_unlock(&journal->j_state_lock); + write_unlock(&journal->j_state_lock); } static journal_t *ext4_get_journal(struct super_block *sb, |