From: Andrew Gallatin <[EMAIL PROTECTED]> Date: Tue, 23 Oct 2007 11:11:55 -0400
> I've attached a patch which adds support to inet_lro for aggregating > pure acks. I've applied this patch to net-2.6.25... but! This needs some serious thinking. What this patch ends up doing is creating big stretch-ACKs, and those can hurt performance. Stretch ACKs are particularly harmful when either the receiver is cpu weak (lacking enough cpu power to fill the pipe completely no matter what optimizations are applied) or when there is packet loss (less feedback information and ACK clocking). It also means that the sender will be more bursty, because it will now swallow ACKs covering huge portions of the send window, and then have large chunks of it's send queue it can send out all at once. Fundamentally, I really don't like this change, it batches to the point where it begins to erode the natural ACK clocking of TCP, and I therefore am very likely to revert it before merging to Linus. - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html