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28 .\" @(#)swapon.2 8.1 (Berkeley) 6/4/93
36 .Nd control devices for interleaved paging/swapping
42 .Fn swapon "const char *special"
44 .Fn swapoff "const char *special"
49 makes the block device
51 available to the system for
52 allocation for paging and swapping.
53 The names of potentially
54 available devices are known to the system and defined at system
56 The size of the swap area on
58 is calculated at the time the device is first made available
63 system call disables paging and swapping on the given device.
64 All associated swap metadata are deallocated, and the device
65 is made available for other purposes.
67 If an error has occurred, a value of -1 is returned and
69 is set to indicate the error.
78 A component of the path prefix is not a directory.
79 .It Bq Er ENAMETOOLONG
80 A component of a pathname exceeded 255 characters,
81 or an entire path name exceeded 1023 characters.
83 The named device does not exist.
85 Search permission is denied for a component of the path prefix.
87 Too many symbolic links were encountered in translating the pathname.
89 The caller is not the super-user.
94 points outside the process's allocated address space.
99 can fail for the following reasons:
105 is not a block device.
107 The device specified by
110 been made available for swapping
112 The major device number of
114 is out of range (this indicates no device driver exists
115 for the associated hardware).
117 An I/O error occurred while opening the swap device.
125 The system is not currently swapping to
128 Not enough virtual memory is available to safely disable
129 paging and swapping to the given device.
138 system call appeared in
142 system call appeared in