Messages in this thread | | | Date | Fri, 29 May 2015 18:10:36 +0200 | From | Borislav Petkov <> | Subject | Re: [PATCH 02/19] x86, fpu: Wrap get_xsave_addr() to make it safer |
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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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