Task issuing I/O hung in vx_write() using vxfs module

Issue

• Task doing dd issuing I/O hung in vx_write():

PID: 133372  TASK: ffff97bf31066a90  CPU: 15  COMMAND: "dd"
 #0 [ffff97bf3763f488] __schedule at ffffffff825858fa
 #1 [ffff97bf3763f518] schedule at ffffffff82585da9
 #2 [ffff97bf3763f528] schedule_timeout at ffffffff825838b1
 #3 [ffff97bf3763f5d0] wait_for_completion at ffffffff8258615d
 #4 [ffff97bf3763f630] vx_dio_physio at ffffffffc0e96493 [vxfs]
 #5 [ffff97bf3763f830] vx_dio_rdwri at ffffffffc0d1255f [vxfs]
 #6 [ffff97bf3763fa78] vx_write1 at ffffffffc0edf4fd [vxfs]
 #7 [ffff97bf3763fbe0] vx_write_common_slow at ffffffffc0ee0769 [vxfs]
 #8 [ffff97bf3763fcc0] vx_write_common at ffffffffc0ee1abb [vxfs]
 #9 [ffff97bf3763fdd8] vx_write at ffffffffc0e4b507 [vxfs]
#10 [ffff97bf3763fec8] vfs_write at ffffffff8204d200
#11 [ffff97bf3763ff08] sys_write at ffffffff8204dfcf
#12 [ffff97bf3763ff50] system_call_fastpath at ffffffff82592ed2
    RIP: 00007fc8f67a6a00  RSP: 00007ffc82230120  RFLAGS: 00010206
    RAX: 0000000000000001  RBX: 0000000000000000  RCX: 0000000000000fff
    RDX: 0000000000100000  RSI: 00007fc8f6b95000  RDI: 0000000000000001
    RBP: 0000000000100000   R8: ffffffffffffffff   R9: 0000000000102003
    R10: 00007ffc8222f4e0  R11: 0000000000000246  R12: 0000000000100000
    R13: 00007fc8f6b95000  R14: 00007fc8f6c95000  R15: 0000000000000000
    ORIG_RAX: 0000000000000001  CS: 0033  SS: 002b