rumpfs(4) - NetBSD Manual Pages

RUMPFS(4)               NetBSD Kernel Interfaces 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 auto-
     matically 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 facili-
                tate simple operations such as hosting config files or creat-
                ing 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 hierar-
     chies.  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.

NetBSD 10.99                     March 3, 2014                    NetBSD 10.99