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Allocating root in one cgroup and rest in seperate cgroup, makes the root hang

Solution Unverified - Updated 2015-06-24T10:40:28+00:00 -

Issue

ps ef from root hangs if root is kept in one cgroup and rest in a separate cgroup.
What's the use of memory.memsw.limit_in_bytes and memory.oom_control parameter in cgroup ?

Environment

Red Hat Enterprise Linux 6.
cgroup

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