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PROBE::NF(3stap) Network File Storage Tapsets PROBE::NF(3stap)

probe::nfs.aop.write_begin
 

NAME

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

SYNOPSIS

nfs.aop.write_begin

VALUES

dev
device identifier
page_index
offset within mapping, can used a page identifier and position identifier in the page frame
__page
the address of page
size
write bytes
to
end address of this write operation
ino
inode number
offset
start address of this write operation

DESCRIPTION

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
May 2013 SystemTap Tapset Reference