probe::nfs.fop.sendfile — NFS client send file operation
nfs.fop.sendfile
pposcurrent position of file
countread bytes
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.
inoinode number
cache_timewhen we started read-caching this inode
devdevice identifier
cache_validcache related bit mask flag