probe::nfs.proc.read.3stap - Man Page
NFS client synchronously reads file from server
IP address of server
used to set task->tk_flags in rpc_init_task function
the file offset
read bytes in this execution
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.
November 2022 SystemTap Tapset Reference Network File Storage Tapsets