Commit 2631b79f authored by Seymour, Shane M's avatar Seymour, Shane M Committed by David S. Miller

tcp: increase size at which tcp_bound_to_half_wnd bounds to > TCP_MSS_DEFAULT

In previous commit 01f83d69
the following comments were added:

"When peer uses tiny windows, there is no use in packetizing to sub-MSS
pieces for the sake of SWS or making sure there are enough packets in
the pipe for fast recovery."

The test should be > TCP_MSS_DEFAULT not >= 512. This allows low end
devices that send an MSS of 536 (TCP_MSS_DEFAULT) to see better network
performance by sending it 536 bytes of data at a time instead of bounding
to half window size (268). Other network stacks work this way, e.g. HP-UX.
Signed-off-by: default avatarShane Seymour <shane.seymour@hpe.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent b1ed4c4f
...@@ -589,7 +589,7 @@ static inline int tcp_bound_to_half_wnd(struct tcp_sock *tp, int pktsize) ...@@ -589,7 +589,7 @@ static inline int tcp_bound_to_half_wnd(struct tcp_sock *tp, int pktsize)
* On the other hand, for extremely large MSS devices, handling * On the other hand, for extremely large MSS devices, handling
* smaller than MSS windows in this way does make sense. * smaller than MSS windows in this way does make sense.
*/ */
if (tp->max_window >= 512) if (tp->max_window > TCP_MSS_DEFAULT)
cutoff = (tp->max_window >> 1); cutoff = (tp->max_window >> 1);
else else
cutoff = tp->max_window; cutoff = tp->max_window;
......
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