cur_log = flist_first_entry(&log->io_logs, struct io_logs, list);
flist_del_init(&cur_log->list);
flush_samples(f, cur_log->log, cur_log->nr_samples * log_entry_sz(log));
cur_log = flist_first_entry(&log->io_logs, struct io_logs, list);
flist_del_init(&cur_log->list);
flush_samples(f, cur_log->log, cur_log->nr_samples * log_entry_sz(log));