Messages in this thread | | | Subject | Re: [patch] TCP/IP delacks disabled with MPI | Date | Wed, 2 Jun 1999 17:12:41 +0100 (BST) | From | Alan Cox <> |
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> Really? It is dubius idea. If keepalives will be lost, > link will fail. And they will be lost, if share queue with data.
It works very well. They are marked high priority and some can be lost happily without problems.
> No, Alan. I am ready to give up, but it is very dubiuos. > dev_queue_xmit is used for data. It cannot be used before > link setup is finished, because there is no link yet.
Of course it can. I bring the interface up and there is a link at the physical layer, but no valid IP path. The wire is up, the IP isnt at that point.
> I am sorry, but if CBQ is attached to the device, these > guys who implemented keepalives in this manner risk to drop > their control data to a blackhole or to police them to death.
There is no other sane way to do it. It works and it works well. I know about the potential problem, but until there is a clean dev_queue_xmit_head() function then it will have to stay
> It is interesting also, how Cisco HDLC keepalives look in tcpdump 8)
Grin.
Alan
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