Re: [patch 00/41] cpu alloc / cpu ops v3: Optimize per cpu access

Andi Kleen
2008-06-09T19:12:35Z

Christoph Lameter <clameter@sgi.com> writes:

> The problem is that offsets relative to %gs or %fs are limited by the
> small memory model that is chosen.

Actually they are not. If you really want you can do
movabs $64bit,%reg ; op ...,%gs:(%reg)
It's just not very efficient compared to small (or rather kernel) model
and also older binutils didn't support large model.

-Andi