RE: [PATCH v4 net-next 13/16] tcp: allow congestion control to expand send buffer differently

From: Stephen Hemminger

Sent: 20 September 2016 18:48

...

quoted

-	sndmem = 2 * nr_segs * per_mss;
+	sndmem = ca_ops->sndbuf_expand ? ca_ops->sndbuf_expand(sk) : 2;

You could avoid the conditional (if it mattered) by inheriting a default value
that would mean changing all existing congestion control modules.
So doing it this way makes life easier.

The indirect call is probably worse than the conditional.

	David