ipc_namespaces(7)
IPC namespaces isolate certain IPC resources, namely, System V IPC objects (see sysvipc(7)) and (since Linux 2.6.30) POSIX message queues (see mq_overview(7)). The common characteristic of these IPC mechanisms is that IPC objects are identified by mechanisms other than filesystem pathnames.
NOTE:
通过上述描述可知,ipc_namespaces(7) 其实本质上还是用于实现名称隔离的,和其他的namespace无异。