Lougher has made a pull request for xz support (effectively lzma2) for
squashfs for 2.6.38. The merge window closes in about 3 days, so we should
know pretty shortly whether or not this request is accepted, but the odds
look good.
We already have squashfs-tools support ready to go. I'll work on adding
a documentation patch to note xz as an available compression type soon.
Once we have a 2.6.38 kernel in rawhide (assuming the patch set gets pulled)
I like to switch the default to using xz instead of gzip for livecd-creator.
If we find problems we can switch back easily, but I'd like to get testing
going earlier rather than later.
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