probe::nfs.aop.write_begin — NFS client begin to write data
nfs.aop.write_begin
__pagethe address of page
toend address of this write operation
sizewrite bytes
devdevice identifier
inoinode number
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