probe::nfs.aop.write_begin — NFS client begin to write data
nfs.aop.write_begin
toend address of this write operation
inoinode number
devdevice identifier
sizewrite bytes
__pagethe address of page
page_indexoffset within mapping, can used a page identifier and position identifier in the page frame
offsetstart address of this write operation
Occurs when write operation occurs on nfs. It prepare a page for writing, look for a request corresponding to the page. If there is one, and it belongs to another file, it flush it out before it tries to copy anything into the page. Also do the same if it finds a request from an existing dropped page