Re: UMIP and clearcpuid=
From: Borislav Petkov
Date: Thu Jun 11 2026 - 22:22:29 EST
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...
Thx.
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette