Provided by: systemtap-doc_2.3-1ubuntu1_all
probe::sunrpc.sched.release_task - Release all resources associated with a task
tk_flags the flags of the task xid the transmission id in the RPC call vers the program version in the RPC call prog the program number in the RPC call prot the IP protocol in the RPC call
rpc_release_task function might not be found for a particular kernel. So, if we can't find it, just return '-1' for everything.