This is your syslogd daemon which is logging a "MARK" at each 20min usually.
You can disable this with "-m 0" on startup(read sysklogd(8)).
-- Mircea Damian Network Manager dmircea@roedu.net, dmircea@lbi.ro, dmircea@kappa.ro- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/