> crash> bt
> PID: 11256 TASK: ffff880715ca4480 CPU: 0 COMMAND: "rename14"
> #0 [ffff88071fc9f788] die at ffffffff81008f3b
> #1 [ffff88071fc9f7b8] do_general_protection at ffffffff81005f91
> #2 [ffff88071fc9f7e0] general_protection at ffffffff81602102
> [exception RIP: ptlrpc_add_unreplied+93]
> RIP: ffffffffa0a6510d RSP: ffff88071fc9f890 RFLAGS: 00010203
> RAX: 5a5a5a5a5a5a5a5a RBX: ffff88082fc16000 RCX: ffff88070eca0550
> RDX: ffff88082fc16000 RSI: ffff88082fc160c8 RDI: ffff88070eca0380
> RBP: ffff88071fc9f890 R8: 00058c32354ea8c4 R9: 0000000000000028
> R10: 0000000000000001 R11: ffff88070d5f8310 R12: 0000000000000065
> R13: ffff88070eca0380 R14: 0000000000000000 R15: 0000000000000000
> ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018
> #3 [ffff88071fc9f898] __ptlrpc_request_bufs_pack at ffffffffa0a6b3de [ptlrpc]
> #4 [ffff88071fc9f8f0] ptlrpc_request_bufs_pack at ffffffffa0a6b5f1 [ptlrpc]
> #5 [ffff88071fc9f930] ptlrpc_request_pack at ffffffffa0a6b61f [ptlrpc]
> #6 [ffff88071fc9f958] ldlm_prep_elc_req at ffffffffa0a4f1d7 [ptlrpc]
> #7 [ffff88071fc9f9b8] ldlm_enqueue_pack at ffffffffa0a4f5c6 [ptlrpc]
> #8 [ffff88071fc9f9e8] ldlm_cli_enqueue at ffffffffa0a4fec4 [ptlrpc]
> #9 [ffff88071fc9fa78] osc_enqueue_base at ffffffffa0dc4316 [osc]
> #10 [ffff88071fc9fb08] osc_lock_enqueue at ffffffffa0dcd18f [osc]
> #11 [ffff88071fc9fbc8] cl_lock_enqueue at ffffffffa092e37d [obdclass]
> #12 [ffff88071fc9fc00] lov_lock_enqueue at ffffffffa0bf89c9 [lov]
> #13 [ffff88071fc9fc50] cl_lock_enqueue at ffffffffa092e37d [obdclass]
> #14 [ffff88071fc9fc88] cl_lock_request at ffffffffa092e8b7 [obdclass]
> #15 [ffff88071fc9fcc0] cl_io_lock at ffffffffa093376c [obdclass]
> #16 [ffff88071fc9fd00] cl_io_loop at ffffffffa0933a7b [obdclass]
> #17 [ffff88071fc9fd30] ll_file_io_generic at ffffffffa0cd36c8 [lustre]
> #18 [ffff88071fc9fe20] ll_file_write_iter at ffffffffa0cd3cbd [lustre]
> #19 [ffff88071fc9fe50] __vfs_write at ffffffff811a450a
> #20 [ffff88071fc9fed0] vfs_write at ffffffff811a4b32
> #21 [ffff88071fc9ff10] sys_write at ffffffff811a5836
> #22 [ffff88071fc9ff50] entry_SYSCALL_64_fastpath at ffffffff8160041b
> RIP: 00007ff12dd1c560 RSP: 00007ffcea021e08 RFLAGS: 00000246
> RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007ff12dd1c560
> RDX: 0000000000000025 RSI: 00007ff12c09d000 RDI: 0000000000000001
> RBP: 00007ffcea021e70 R8: 00007ff1308ddb80 R9: 203a202053534150
> R10: 00000000192c7473 R11: 0000000000000246 R12: 0000000020002d93
> R13: 00007ffcea0221e0 R14: 0000000000000000 R15: 0000000000000000
> ORIG_RAX: 0000000000000001 CS: 0033 SS: 002b