GPFS文件系统无法卸载

[root@powergpfs01 /]# mmumount /jsdata_gpfs -N powergpfs01m -f

===============================================================================

| Warning:                                                                    |

|   This cluster contains nodes that do not have a proper GPFS license        |

|   designation.  This violates the terms of the GPFS licensing agreement.    |

|   Use the mmchlicense command and assign the appropriate GPFS licenses      |

|   to each of the nodes in the cluster.  For more information about GPFS     |

|   license designation, see the Concepts, Planning, and Installation Guide.  |

===============================================================================

Wed Dec 28 10:45:26 CST 2016: mmumount: Unmounting file systems ...

powergpfs01m:  umount2: Device or resource busy

powergpfs01m:  umount: /jsdata_gpfs: device is busy.

powergpfs01m:          (In some cases useful info about processes that use

powergpfs01m:           the device is found by lsof(8) or fuser(1))

powergpfs01m:  umount2: Device or resource busy

[root@powergpfs01 /]# lsof /jsdata_gpfs/

提示忙，我lsof查询又无设备使用