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From: Borislav Petkov <bp@alien8.de>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Ronan Pigott <ronan@rjp.ie>,
	linux-kernel@vger.kernel.org, x86@kernel.org
Subject: Re: UMIP and clearcpuid=
Date: Thu, 11 Jun 2026 19:21:58 -0700	[thread overview]
Message-ID: <20260612022158.GDaittRqWfYLGwPHNw@fat_crate.local> (raw)
In-Reply-To: <20260611183736.GI187714@noisy.programming.kicks-ass.net>

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

  reply	other threads:[~2026-06-12  2:22 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-06-10 19:46 Ronan Pigott
2026-06-10 20:00 ` Borislav Petkov
2026-06-10 20:41   ` Ronan Pigott
2026-06-10 23:55     ` Borislav Petkov
2026-06-11  7:53       ` Peter Zijlstra
2026-06-11 16:09         ` Borislav Petkov
2026-06-11 18:37           ` Peter Zijlstra
2026-06-12  2:21             ` Borislav Petkov [this message]
2026-06-12  6:42               ` Peter Zijlstra
2026-06-12 14:49                 ` Borislav Petkov
2026-08-14 11:50             ` Peter Zijlstra
2026-08-14 12:12               ` Peter Zijlstra
2026-08-14 12:57                 ` Andrew Cooper
2026-08-14 13:23                   ` Peter Zijlstra
2026-08-17 21:39                     ` Kenny Wottrich
2026-08-14 12:19             ` Peter Zijlstra

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