> Why show these special connections if the user cannot interact with or
> shape the stream at all like normal ones?
So that an admin can see what connections are open, so that the stack
doesn't try to reuse the same 4-tuple for another connection, etc, etc.
> And I even wonder, these days, if you probably get %90 or more of the
> gain these "optimized" iSCSI connections obtain from things like LRO.
Yes, that's the question -- are stateless offloads (plus CRC32C in the
CPU etc) going to give good enough performance that the whole TCP
offload exercise is pointless? The only issue is that I don't see how
to avoid the fundamental 3X increase in memory bandwidth that is chewed
up if the NIC can't do direct placement.
- R.
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