Messages in this thread | | | Date | Wed, 25 Jan 2006 20:10:52 +0900 | From | Zongsheng Zhang <> | Subject | TCP fast retransmit/recovery |
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Hi,
About TCP fast retransmit/recovery, it is described in RFC 2581:
1) When the third duplicate ACK is received, set ssthresh to no more than the value max(FlightSize/2, 2*SMSS).
2) Retransmit the lost segment and set cwnd to ssthresh plus 3*SMSS.
However, in kernel 2.4.31 (or 2.6.15), cwnd is always set to 1 (in tcp_enter_loss()), even there is only one packet is drop.
Does anyone know the reason?
Regards,
-- Zongsheng Zhang zhang@ist.osaka-u.ac.jp - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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