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fd972a739c
Before we were unshare(CLONE_NEWCGROUP)ing in a child task, which meant that we couldn't c/r this test once we forbid nested cgroup namespaces. Instead, use a new strategy for testing cgroup namespaces: set up the namespace before forking the test task so there is no nesting, and then do a setns back to init's ns to check the cgroup namespace of the test. This doesn't work in the 'ns' flavor because init in the test's pid ns is the test itself. There is a bit of a chicken and egg problem here, though, because if we set it up after test_init(), we can't unshare because that would be a nested cgroup ns. Signed-off-by: Tycho Andersen <tycho.andersen@canonical.com> Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>