Re: [PATCH 02/19] x86, fpu: Wrap get_xsave_addr() to make it safer

[Borislav Petkov]

On Thu, May 28, 2015 at 06:05:33PM -0700, Andy Lutomirski wrote:
> I would propose that we take the opposite approach and just ban
> eagerfpu=off when MPX is enabled.  We could then take the next step
> and default eagerfpu=on for everyone and, if nothing breaks, then just
> delete lazy mode entirely.
> 
> I suspect we'd have to go back to Pentium 3 or earlier to find a CPU
> on which lazy mode is actually a good idea.

Last time I checked (and ran some benchmarks) it was only a minute
slowdown so I say we kill lazy mode if it means significant code
complexity drop.

Can I also emulate Greg here and suggest that Pentium 3 people should
buy newer hw? They should think about the environment, if nothing else.

:-P

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
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