System hang due to vxconfigd and bio stall after removal of vxdmp device

Issue

• Removing a vxdmp device hangs vxconfigd and stalled bio:

dmpdaemon       D ffff94bd35bf68e0     0  1865      2 0x00000000
Call Trace:
 [<ffffffffbdf8c3e9>] schedule+0x29/0x70
 [<ffffffffbdf8ddd5>] rwsem_down_read_failed+0x105/0x1c0
 [<ffffffffc047a9e0>] ? dmp_free_stats_table+0x180/0x180 [vxdmp]
 [<ffffffffbdb98198>] call_rwsem_down_read_failed+0x18/0x30
 [<ffffffffbdf8b8b0>] down_read+0x20/0x40
 [<ffffffffc0474265>] dmp_reconfig_read_lock+0x15/0x20 [vxdmp]
 [<ffffffffc047aa6a>] dmp_process_stats+0x8a/0x6a0 [vxdmp]
 [<ffffffffc04836ec>] dmp_daemons_loop+0x1ac/0x250 [vxdmp]
 [<ffffffffc0483540>] ? dmp_lookup_bitmap+0x100/0x100 [vxdmp]
 [<ffffffffbd8c5e61>] kthread+0xd1/0xe0
 [<ffffffffbd8c5d90>] ? insert_kthread_work+0x40/0x40
 [<ffffffffbdf99df7>] ret_from_fork_nospec_begin+0x21/0x21
 [<ffffffffbd8c5d90>] ? insert_kthread_work+0x40/0x40