probe::nfs.fop.aio_read — NFS client aio_read file operation
nfs.fop.aio_read
file_name
file name
cache_time
when we started read-caching this inode
cache_valid
cache related bit mask flag
parent_name
parent dir name
dev
device identifier
buf
the address of buf in user space
ino
inode number
pos
current position of file
count
read bytes
attrtimeo
how 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.