Re: [rfc 08/45] cpu alloc: x86 support

H. Peter Anvin
2007-11-20T21:01:56Z

Andi Kleen wrote:
>> This limitation shouldn't apply to the percpu area, since gs_base can be
>> pointed anywhere in the address space -- in effect we're always indirect.
>
> The initial reference copy of the percpu area has to be addressed by
> the linker.
>
> Hmm, in theory since it is not actually used by itself I suppose you could
> move it into positive space.
>

Positive space for absolute references, or just below -2 GB for %rip
references; either should work.

-hpa