probe::nfs.fop.read_iter — NFS client read_iter file operation
nfs.fop.read_iter
inoinode number
countread bytes
poscurrent position of file
parent_nameparent dir name
cache_timewhen we started read-caching this inode
devdevice identifier
cache_validcache related bit mask flag
file_namefile name
attrtimeohow long the cached information is assumed to be valid. We need to revalidate the cached attrs for this inode if jiffies - read_cache_jiffies > attrtimeo.