Mailinglist Archive: opensuse-factory (381 mails)

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Re: [opensuse-factory] NVidia Bumblebee driver update, question for i586 users
On 10/23/18 6:15 PM, Liam Proven wrote:
On 23/10/2018 16:08, John Paul Adrian Glaubitz wrote:
You should still be able to create an i586 package for 32-bit systems
running on
a 64-bit kernel.

Hang on... how can you run a 64-bit kernel on a 32-bit machine?

You can't.

Sure, you can run a 32-bit _distro_ on a 64-bit machine, but not the
reverse...

I didn't claim that. But it's not uncommon to use a 64-bit kernel with a 32-bit
userland. It's not *that* common on x86 because 64-bit x86 is much more than
just
a doubled pointer width as compared to 32-bit x86 (more registers, instructions
etc).

But it's quite common on architectures like POWER or SPARC where a 32-bit
userland
can have measurable performance advantages over 64-bit. There is a largely
unknown
approach to achieve that on x86 called x32 for which there is a Debian port.

Adrian
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