[Bug 1075717] Re: mounted-dev must not re-create consoles in a container

[Steve Langasek]

Have talked through this with hallyn in detail.

 - we don't want to change MAKEDEV itself to not clobber existing device nodes, because in other cases this makes recovery from broken /dev less reliable
 - we can't side-step this by making /dev not be a mountpoint within the container because in some cases users want to use a read-only rootfs
 - we can't use devtmpfs instead because there is only *one* devtmpfs in the kernel no matter where it's mounted, so this would make it impossible to make the exact change to node targets that this is about.

So I'm convinced that the linked branch is an appropriate solution to
this problem.  It has no impact on the common case when /dev is a
devtmpfs, we don't call MAKEDEV at all in that scenario.

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Title:
  mounted-dev must not re-create consoles in a container

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