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SubjectRe: [benchmark] 1% performance overhead of paravirt_ops on native kernels
Ingo Molnar wrote:
>
> OTOH, highmem is clearly a useful hardware enablement feature with a
> slowly receding upside and a constant downside. The outcome is
> clear: when a critical threshold is reached distros will stop
> enabling it. (or more likely, there will be pure 64-bit x86 distros)
>

A major problem is that distros don't seem to be willing to push 64-bit
kernels for 32-bit distros. There are a number of good (and
not-so-good) reasons why users may want to run a 32-bit userspace, but
not running a 64-bit kernel on capable hardware is just problematic.

-hpa

--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.



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