Re: UMIP and clearcpuid=

[Peter Zijlstra <peterz@infradead.org>]

On Thu, Jun 11, 2026 at 07:21:58PM -0700, Borislav Petkov wrote:
> On Thu, Jun 11, 2026 at 08:37:36PM +0200, Peter Zijlstra wrote:
> > Perhaps just one print per task might be a good start? Something like
> > so?
> > 
> > I don't think anything hits this hard enough to matter performance wise;
> > but the wine stuff can hit them often enough that the dmesg spam is
> > annoying, and there's really nothing much you can do about it.
> > 
> > This is somewhat similar to the split lock stuff, yeah, they're bad, but
> > nobody is going to be fixing those games.
> > 
> > And UMIP really is useful; these are gnarly instructions you really
> > don't want, so as along as it all runs it should be fine. I suppose I
> > should go re-enable it on my own machine and actually spend some time on
> > it if/when I find another game that flat out doesn't work with the
> > emulation.
> 
> Yah, I guess... I don't play them games so meh, but sure, makes sense to me.
> I guess we can have people test it and see whether it helps.. maybe...

I have kids, playing games is mandatory ;-) At least I got out of having
to join Fortnite on account of it not running on Linux (silver lining
and all that).