ocfs2: Support commit= mount option

Mostly taken from ext3. This allows the user to set the jbd commit interval,
in seconds. The default of 5 seconds stays the same, but now users can
easily increase the commit interval. Typically, this would be increased in
order to benefit performance at the expense of data-safety.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>

1 files changed, 6 insertions, 2 deletions

diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c
index 4f440a88bf53..8b9ce2a729ab 100644
--- a/fs/ocfs2/journal.c
+++ b/fs/ocfs2/journal.c
@@ -313,14 +313,18 @@ int ocfs2_journal_dirty_data(handle_t *handle,
         return err;
 }
 
-#define OCFS2_DEFAULT_COMMIT_INTERVAL   (HZ * 5)
+#define OCFS2_DEFAULT_COMMIT_INTERVAL   (HZ * JBD_DEFAULT_MAX_COMMIT_AGE)
 
 void ocfs2_set_journal_params(struct ocfs2_super *osb)
 {
         journal_t *journal = osb->journal->j_journal;
+        unsigned long commit_interval = OCFS2_DEFAULT_COMMIT_INTERVAL;
+
+        if (osb->osb_commit_interval)
+                commit_interval = osb->osb_commit_interval;
 
         spin_lock(&journal->j_state_lock);
-        journal->j_commit_interval = OCFS2_DEFAULT_COMMIT_INTERVAL;
+        journal->j_commit_interval = commit_interval;
         if (osb->s_mount_opt & OCFS2_MOUNT_BARRIER)
                 journal->j_flags |= JFS_BARRIER;
         else