Re: CVS commit: src/sys/arch

[Antti Kantee <pooka%cs.hut.fi@localhost>]

On Sat Jul 24 2010 at 15:23:50 +0000, Quentin Garnier wrote:
> > PAE is a "bridge technology", interesting only for few systems.
> > Users of low-end i386 systems would be penalized, and most users
> > of boxes with >4G memory would gain nothing because they run
> > a 64-bit system anyway.
> > So, imho, no kernel overhead is acceptable.
> 
> Well, that's one opinion.  My own, probably just as humble, is that such
> a gaping ABI incompatibility is completely unacceptable, especially
> after all the work that has been done to make some kernel subsystems a
> little bit more responsible regarding ABI.
> 
> I'm really curious to see some actual measurements about that alleged
> overhead.  The way I see it right now, we have a known lethal ABI
> incompatibility versus an alleged overhead of unknown size.

Didn't anyone else read the mail from a week or so ago containing detailed
measurements of the overhead?

(I'm not 100% sure if I believe the results without further analysis,
but at least there are benchmarks)