JFS: Make sure journal records get flushed to disk

A performance enhancement that reduced the number of partial-page journal
writes resulted in some journal records staying in cache indefinately.  We
need to make sure that these records are written in a timely fashion.

fs/jfs/file.c

@@ -34,10 +34,12 @@ int jfs_fsync(struct file *file, struct dentry *dentry, int datasync)
 	struct inode *inode = dentry->d_inode;
 	int rc = 0;
 
-	if (!(inode->i_state & I_DIRTY))
-		return rc;
-	if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
+	if (!(inode->i_state & I_DIRTY) ||
+	    (datasync && !(inode->i_state & I_DIRTY_DATASYNC))) {
+		/* Make sure committed changes hit the disk */
+		jfs_flush_journal(JFS_SBI(inode->i_sb)->log, 1);
 		return rc;
+	}
 
 	rc |= jfs_commit_inode(inode, 1);
 

fs/jfs/inode.c

@@ -107,14 +107,18 @@ int jfs_commit_inode(struct inode *inode, int wait)
 
 void jfs_write_inode(struct inode *inode, int wait)
 {
+	if (test_cflag(COMMIT_Nolink, inode))
+		return;
 	/*
 	 * If COMMIT_DIRTY is not set, the inode isn't really dirty.
 	 * It has been committed since the last change, but was still
-	 * on the dirty inode list
+	 * on the dirty inode list.
 	 */
-	if (test_cflag(COMMIT_Nolink, inode) ||
-	    !test_cflag(COMMIT_Dirty, inode))
+	 if (!test_cflag(COMMIT_Dirty, inode)) {
+		/* Make sure committed changes hit the disk */
+		jfs_flush_journal(JFS_SBI(inode->i_sb)->log, wait);
 		return;
+	 }
 
 	if (jfs_commit_inode(inode, wait)) {
 		jfs_err("jfs_write_inode: jfs_commit_inode failed!");