DOKK / manpages / debian 10 / systemtap-doc / probe::nfs.aop.write_begin.3stap.en
PROBE::NFS.AOP.W(3stap) Network File Storage Tapsets PROBE::NFS.AOP.W(3stap)

probe::nfs.aop.write_begin - NFS client begin to write data

nfs.aop.write_begin

__page

the address of page

ino

inode number

dev

device identifier

page_index

offset within mapping, can used a page identifier and position identifier in the page frame

offset

start address of this write operation

size

write bytes

to

end 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

tapset::nfs(3stap)

October 2018 SystemTap Tapset Reference