> I fear that creating a new mount ns for each net ns will introduce more problems. Not sure if we're talking past each other but that is what's happening now. Each new ip netns exec invocation will allocate a _new_ mount namespace. In other words, if you have 300 ip netns exec commands running then there will be 300 individual mount namespaces active. What I tried to say is that ip netns exec could be changed to _optionally_ allocate a prepared mount namespace that is shared between ip netns exec commands. And yeah, that would need to be a new command line addition to ip netns exec.
