Re: [PATCH 01/29] tsx: Add generic noop macros for RTM intrinsics

Michael Neuling
2013-03-25T08:50:31Z

Andi Kleen <ak@linux.intel.com> wrote:

> > RTM == restricted transactional memory. I don't understand why it's
> > "restricted" and why any other architecture else would call it that and
>
> It's restricted as in there is no guarantee that a transaction ever succeeds
> and always needs a fallback path. My understanding is that this is true for
> PPC too, but not necessarily zSeries.

Yes, ppc is limited in this way too. We just didn't call it a silly
name, although we do have the TEXASR register for TM status to make up
for it. :-)

Mikey

>
> > hence why Linux should call it that?
> >
> > Can we just call it TM for transactional memory? Each arch can then
> > have their own implementation and call it what they want.
>
> I don't think the name will stop them to do anything.
>
> If people feel strongly about it can change it, but it's not
> actually making a real difference.
>
> -Andi
> --
> ak@linux.intel.com -- Speaking for myself only
>