Hi Stephen, 2.6.21-rc1 is the first kernel where my SysKonnect Yukon 2 hardware with the sky2 v1.13 driver is stable under moderate load. Before a few GBs of data going over my GigE network quickly with NFSv4 would cause transmit timeouts previously, but now fine. I am still observing a performance problem - feels like a wmb() or some buffer flushing is missing somewhere - disabling processor clock scaling reduces the problem a bit, but does not eliminate it. What are your preferred way of checking performance? I think that the TCP send window can grow enough even if ACKs are delayed due to this problem, such that TCP does not immediately demonstrate this issue. I could restrict the window scaling factor, so it would be bound by the data->ACK round-trip latency, which /should/ be low, but I've been observing it higher. Maybe I try this. I'll see what I get with iperf UDP also, since this shows min, max, avg UDP packet latency IIRC. Thanks for your great work so far though! Dan -- Daniel J Blueman - To unsubscribe from this list: send the line "unsubscribe linux-net" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
