- if (tc->limited_transmit != tc->snd_nxt
- && (seq_lt (tc->limited_transmit, tc->snd_nxt - 2 * tc->snd_mss)
- || seq_gt (tc->limited_transmit, tc->snd_nxt)))
+ int snt_limited, n_pkts;
+
+ n_pkts = tcp_opts_sack_permitted (&tc->rcv_opts)
+ ? tc->sack_sb.reorder - 1 : 2;
+
+ if ((seq_lt (tc->limited_transmit, tc->snd_nxt - n_pkts * tc->snd_mss)
+ || seq_gt (tc->limited_transmit, tc->snd_nxt)))