Re: [Suspend2][ 0/9] Extents support.

["Martin J. Bligh" <mbligh@mbligh.org>]

> 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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