Hello!
> /* Not-A-Trick#2 : Classic rule... */
> if (tcp_fackets_out(tp) > tp->reordering)
> ^^^^^^^^^
> return 1;
...
> Shouldn't it be a >= instead of > ?
No. fackets_out is equivalent of Reno dupacks+1.
F.e. look at the most common case, where FACK is equivalent to Reno:
| hole | sack1 | sack2 | sack3
fackets_out = 4
but
dupacks = 3
Alexey
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