That's not true. The compression and encryption support add ~1000 lines, as
you pointed out the other day. If I moved compression and encryption support
to userspace, I'd remove 1000 lines and:
- add more code for getting the pages copied to and from userspace
- require the user to get and build $LIBRARIES for doing the compression
- require the user to get and build $HELPER for doing the interface to
Suspend2
- fail to leverage the perfectly good cryptoapi routines that are already
there
- slow the whole process down because I'd now have a copy to userspace for
every page being compressed/encrypted and a copy from userspace for every
output page.
- make life more complicated for distro maintainers and users because they'd
have another set of dependencies to worry about and mess with.
I'm not saying it's impossible. I'm just saying it would make suspending more
complicated, at least potentially slower and more of a pain for everyone.
Thanks for actually thinking through about the implications of pushing
yet another subsystem out into userspace. Most people don't seem to
bother ;-(
M.
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