Quoting Pavel Emelyanov (xemul@openvz.org):
> Dave Hansen wrote:
> > On Thu, 2008-02-07 at 18:04 +0300, Pavel Emelyanov wrote:
> >> Having this proxy is the easiest way to keep the global list and
> >> file_system_type structure (almost) untouched and simplify the code.
> >>
> >> The filesystems.list file syntax is simple: [+-]<name> without
> >> a '\n' at the end. Made for 2.6.24-rc8-mm1
> > 
> > For what would you want this?  What kinds of filesystems would you like
> > to restrict the use of in a container?
> 
> Any you want to.
> 
> E.g. ext3 with its journaling thread. Having 100 containers
> with a journal in each kills the node. 
> E.g. cgroupsfs if you don't want your cgroup create its 
> own ones. 

Ah, so that answers that question - you enforce this by umounting
/cgroups in the container and not letting them remount it?

> E.g. NFS that can stuck on umount and block you container
> on stop.
> 
> > -- Dave
> 
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