How to use xzio?

[Seth Goldberg]

Hi,

  I'm trying to experiment with loading xz-compressed multiboot modules and 
cannot figure out how to do it so that the xzio module can actually deal with 
the compressed file (after instrumenting it, the problem is "unsupported xz 
options"),  I've tried simply compressing the file I'm interested in loading 
with "xz", and with "xz -1" and both of the files cannot be decompressed. 
What's the deal with the xz support, then?

Also, the grub manual currently only lists gzip:

"
Support automatic decompression
    Can decompress files which were compressed by gzip. This function is both 
automatic and transparent to the user (i.e. all functions operate upon the 
uncompressed contents of the specified files). This greatly reduces a file 
size and loading time, a particularly great benefit for floppies.2

    It is conceivable that some kernel modules should be loaded in a 
compressed state, so a different module-loading command can be specified to 
avoid uncompressing the modules. 
"

 (the manual does not mention the --nounzip flag to the module command, 
either).

 --S