Ah the problem was that /etc/mtab was a file, and /run/netns did not
show up in it so mount refused to act on it.  Changing /etc/mtab to a
symlink to /proc/mounts allows me to make those rslave.

So it should suffice for lxc to always turn all of / into MS_SLAVE.  It
currently does so only when / is MS_SHARED.

** Changed in: iproute (Ubuntu)
       Status: Confirmed => Invalid

** Summary changed:

- network namespace error
+ /run/netns/* gets umounted on the host when a container starts

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https://bugs.launchpad.net/bugs/1307829

Title:
  /run/netns/* gets umounted on the host when a container starts

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