From: "Ilpo_Järvinen" <[EMAIL PROTECTED]> Date: Fri, 16 Mar 2007 20:41:05 +0200
> 1) Couple of skb states are mutually exclusive > > Skb cannot be in both S and L states at the same time, adding > non-S nor L skb count (below highest sack) to that can be > compared against fackets_out to see if anything below the > current skb can still be marked with L or not. If they're > equal (or fackets_out is smaller), the next skb will have L > set for sure. > > 2) Create a fastpath for the new LOST marker > > The fastpath takes advantage of the fact that the latest ACK > very likely contains the globally highest SACK block. By > verifying that is larger than tp->reordering, whole SACK block > can be skipped while counting for not-to-be marked skbs until > tp->reordering of them is encountered. Since TCP now can know, > that should block exists as highest, the marking can begin right > below it. If the latest ACK does not contain a SACK block that > reaches all the way to the highest_sack (e.g., due to > reordering), a slow path is used. Excellent observation. :) > Signed-off-by: Ilpo Järvinen <[EMAIL PROTECTED]> Patch applied, thanks. - 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
