Nfs client synchronously reads file from server
nfs.proc.read
version
NFS version
server_ip
IP address of server
count
read bytes in this execution
prot
transfer protocol
flags
used to set task->tk_flags in rpc_init_task function
offset
the file offset
All the nfs.proc.read kernel functions were removed in kernel commit 8e0969 in December 2006, so these probes do not exist on Linux 2.6.21 and newer kernels.