PROBE::NFS.AOP.W(3stap) Network File Storage Tapsets PROBE::NFS.AOP.W(3stap)

# [NAME](#NAME)

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

# [SYNOPSIS](#SYNOPSIS)

```
probe nfs.aop.write_begin {}
```

# [VALUES](#VALUES)

*page\_index*

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

*ino*

inode number

*size*

write bytes

*\_\_page*

the address of page

*to*

end address of this write operation

*offset*

start address of this write operation

*dev*

device identifier

# [DESCRIPTION](#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

# [SEE ALSO0](#SEE_ALSO0)

[*tapset::nfs*(3stap)](/man/enterprise-packages/systemtap/tapset::nfs.3stap)

September 2026 SystemTap Tapset Reference Ver

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Document: probe::nfs.aop.write_begin(3stap) from systemtap 5.6-r1 (Chainguard OS)
Source: https://sourceware.org/git/systemtap.git