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Author SHA1 Message Date
John Heffner 246eb2af06 tcp: Limit cwnd growth when deferring for GSO 
This fixes inappropriately large cwnd growth on sender-limited flows
when GSO is enabled, limiting cwnd growth to 64k.

Signed-off-by: John Heffner <johnwheffner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 2008-04-29 03:13:52 -07:00
John Heffner ce447eb914 tcp: Allow send-limited cwnd to grow up to max_burst when gso disabled 
This changes the logic in tcp_is_cwnd_limited() so that cwnd may grow
up to tcp_max_burst() even when sk_can_gso() is false, or when
sysctl_tcp_tso_win_divisor != 0.

Signed-off-by: John Heffner <johnwheffner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 2008-04-29 03:13:02 -07:00
John Heffner dd9e0dda66 [TCP]: Increase the max_burst threshold from 3 to tp->reordering. 
This change is necessary to allow cwnd to grow during persistent
reordering.  Cwnd moderation is applied when in the disorder state
and an ack that fills the hole comes in.  If the hole was greater
than 3 packets, but less than tp->reordering, cwnd will shrink when
it should not have.

Signed-off-by: John Heffner <jheffner@napa.(none)>
Signed-off-by: David S. Miller <davem@davemloft.net>
 2008-04-16 02:29:56 -07:00