---
name: "nfslockd"
section: "4"
platform: "freebsd"
package: "base"
version: "16.0-CURRENT-20261027-61c70dc16a79"
release: "FreeBSD 16.0-CURRENT (2026-10-27)"
platforms: ["freebsd"]
url: "https://new.carta.tech/nfslockd"
---

# nfslockd(4)

NFS advisory locking

## NAME

**nfslockd** – NFS advisory locking

## SYNOPSIS

To compile this driver into the kernel, place the following lines in your kernel configuration file:

**options NFSLOCKD**

Alternatively, to load the driver as a module at boot time, place the following line in [loader.conf(5)](/loader.conf/5.md):

```
nfslockd_load="YES"
```

## DESCRIPTION

The **nfslockd** driver provides kernel support for NFSv3 advisory locking. It works in tandem with [rpc.lockd(8)](/rpc.lockd/8.md), which will normally load it on startup if it is not already loaded or compiled-in.

## SEE ALSO

[rpc.lockd(8)](/rpc.lockd/8.md)

## HISTORY

The **nfslockd** driver first appeared in FreeBSD 6.4.

## AUTHORS

The **nfslockd** driver was written by Doug Rabson ⟨*dfr@FreeBSD.org*⟩.