This is not really a bug report, but you asked for information in the
info-pages without giving me another mail address.  In the chapter about
cp invocation you write:

> `--sparse=WHEN'
>      A "sparse file" contains "holes"--a sequence of zero bytes that
>      does not occupy any physical disk blocks; the `read' system call
(...)
>      The WHEN value can be one of the following:
(...)
>     `never'
>           Never make the output file sparse.  If you find an
>           application for this option, let us know.

Isn't that, what my mkswap manpage speaks of:

>       To setup a swap file, it is necessary to create that  file
>       before running mkswap , e.g. using a command like
>
>              # dd if=/dev/zero of=swapfile bs=1024 count=65536
>
>       Note  that  a  swap  file  must not contain any holes (so,
>       using cp(1) to create the file is not acceptable).

(MKSWAP(8) Linux Programmer's Manual, Linux 2.2.4, 25 March 1999 from
the Suse 6.3 Distribution)

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