[CentOS] why i can not put my swap files in /dev?

Tue Jul 6 10:50:17 UTC 2010
Eero Volotinen <eero.volotinen at iki.fi>

2010/7/6 Tang Jianwei <myhnet at gmail.com>:
> I tried to create some swap files in /dev directory for my desktop.
> the dd and mkswap were ok. but when I try to swapon it, i get this:
> # swapon /dev/myswap
> swapon: /dev/myswap: Invalid argument
> but when I mv the file to some other directory like /mnt or /, the
> swapon works.

/dev/* is virtual directory containing all devices, not files. create
your swap on disk devices (/dev/sdXX, not in "empty space)