RUMPFS(4) | Device Drivers Manual | RUMPFS(4)

# NAME

`rumpfs` — rump kernel root file system

# LIBRARY

rump kernel (librumpvfs, -lrumpvfs)

# DESCRIPTION

`rumpfs` is a simple in-memory file system for rump kernels. It is automatically mounted as the root file system of a rump kernel at boot time, provided that the VFS faction is configured into the rump kernel instance.

The three main features of `rumpfs` are:

1. providing a hook for accessing host files via the rump_etfs(3) interfaces.
2. supporting enough of file and directory interfaces to facilitate simple operations such as hosting config files or creating mount points.
3. being small and lightweight so as to keep a barebones rump kernel lightweight.

`rumpfs` is not intended for hosting large files or big directory hierarchies. If faced with such a use case, mounting a tmpfs file system inside the rump kernel is recommended.

# SEE ALSO

rump(3)

# HISTORY

`rumpfs` first appeared in NetBSD 6.0.

March 3, 2014 | NetBSD 11.0