Comment by fc417fc802
5 hours ago
Do the partitioned stacks of network namespaces share a single underlying global stack or are they fully independent instances? (And if not, could they be made so?)
5 hours ago
Do the partitioned stacks of network namespaces share a single underlying global stack or are they fully independent instances? (And if not, could they be made so?)
Usually network namespaces are linked together with a single bridge so you can get lock contention there.
If you have a separate physical NIC for each namespace you probably won't have any contention.
I think you could get much of the way there by isolating a single NIC's receive queues, so the kernel doesn't decide to run off and service softirqs for random foreign tasks just because your task called tcp_sendmsg.