* Andi Kleen <a...@firstfloor.org> wrote:
> On Tue, Feb 12, 2013 at 09:43:46AM +0100, Ingo Molnar wrote:
> > Was this stress-tested on all affected main CPU types, or only
> > on Haswell?
>
> I tested it on Haswell and Ivy Bridge. I can also try Westmere
> and a Saltwell(Atom), but for the majority of other family 6
> systems I'll need to rely on the community.
The systems you tested should be OK.
> White listing is somewhat difficult because it affects the
> architectural mode too.
Yeah, I'd rather avoid that.
> I don't really expect problems from this change, we should
> probably have always done it like this.
I expect potential problems: the ordering of the operations in
the NMI handler was always very fragile, resulting in hard to
debug hangs - which sometimes needed hours long very intense PMU
stress-testing to trigger.
That is why I asked how heavily you've tested this. Once the
series passes review I'll keep this patch last to make it easy
to revert/zap if it causes problems.
Thanks,
Ingo
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