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| author | Theodore Ts'o <tytso@mit.edu> | 2010-08-04 03:35:12 +0200 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2010-08-04 03:35:12 +0200 |
| commit | a931da6ac9331a6c80dd91c199105806f2336188 (patch) | |
| tree | 2d4ea766def9a98d21c2379f41e796b0e57ccd6b /fs/ocfs2/journal.c | |
| parent | jbd2: Use atomic variables to avoid taking t_handle_lock in jbd2_journal_stop (diff) | |
| download | linux-a931da6ac9331a6c80dd91c199105806f2336188.tar.xz linux-a931da6ac9331a6c80dd91c199105806f2336188.zip | |
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/ocfs2/journal.c')
| -rw-r--r-- | fs/ocfs2/journal.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c index 47878cf16418..9c1b92ebeb94 100644 --- a/fs/ocfs2/journal.c +++ b/fs/ocfs2/journal.c @@ -760,13 +760,13 @@ void ocfs2_set_journal_params(struct ocfs2_super *osb) if (osb->osb_commit_interval) commit_interval = osb->osb_commit_interval; - spin_lock(&journal->j_state_lock); + write_lock(&journal->j_state_lock); journal->j_commit_interval = commit_interval; if (osb->s_mount_opt & OCFS2_MOUNT_BARRIER) journal->j_flags |= JBD2_BARRIER; else journal->j_flags &= ~JBD2_BARRIER; - spin_unlock(&journal->j_state_lock); + write_unlock(&journal->j_state_lock); } int ocfs2_journal_init(struct ocfs2_journal *journal, int *dirty) |