Re: [RFC 00/15] x86_64: Optimize percpu accesses

[Ingo Molnar]

* Eric W. Biederman <ebiederm@xxxxxxxxxxxx> wrote:

> Jeremy Fitzhardinge <jeremy@xxxxxxxx> writes:
> 
> >> Or we could do something completely evil.  And use the other segment
> >> register for the stack canary.
> >>
> >
> > That would still require gcc changes, so it doesn't help much.
> 
> We could use %fs for the per cpu variables.  Then we could set %gs to 
> whatever we wanted to sync up with gcc

one problem is, there's no SWAPFS instruction.

	Ingo
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