On Tue, Apr 17, 2012 at 08:50:25AM -0700, Kees Cook wrote:
> On Tue, Apr 17, 2012 at 11:08:41AM +0100, Colin Watson wrote:
> > On Tue, Apr 17, 2012 at 02:14:26AM +0200, Pavel Rojtberg wrote:
> > > I would not bet that 14.04 users necessarily will have to get 64bit.
> > > There is the recent x32-abi development which kind of combines
> > > best of both worlds.
> > Is it worth a UDS session on how we might make use of x32? Since the
> > patches aren't e.g. on glibc trunk yet, I don't think we can reasonably
> > make any concrete plans, but perhaps we should be thinking in advance
> > about issues such as partial architectures that x32 brings up.
> It's worth noting that running x32 requires a 64-bit kernel. Moving
> to x32 would be as big a deal (if not more) as moving to x86_64 from
> ia32. And personally, I think just moving to x86_64 is the better goal. :)
x32 is meant to be a compromise that gets us the major benefits of x86_64
(better instruction set) without the drawbacks (more memory pressure).
While it's not standardized or proven yet, I think it's definitely worth
keeping an eye on. We might really find that we don't want x86_64 by
default in 2-4 years because x32 is proving the better choice.