I'm about 99% sure that Debian has run 64-bit SPARC kernels for a while
now, just that few packages are compiled for it. Unlike x86, most binaries
are faster as 32-bit code unless they make use of >= 3GB RAM and/or 64-bit
integer calculations. As a result, only stuff like databases, webservers,
or heavy large integer usage (RSA encryption, e.g.) would really benefit
much. Finding a binary that is faster when compiled as 64-bit code is an
exception to the rule. However, using SPARCv9 instructions (which require a
64-bit CPU) in 32-bit binary can improve performance.

Patrick


> And they even did build a 64 bit kernel as well. A how-to bootstrapping
> it for SPARC64 can be found in this wiki.
>
> http://wiki.debian.org/Sparc64
>
> Thanks,
>
>
> Frans van Berckel
>
>
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