linux-kernel - Re: [PATCH] x86/microcode: Fix crashes on early 486 CPUs due to usage of 'cpuid'.

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Message-ID: <20250408172854.GDZ_Vc1r4SuP2Ng_t_@fat_crate.local>
Date: Tue, 8 Apr 2025 19:28:54 +0200
From: Borislav Petkov <bp@...en8.de>
To: "Maciej W. Rozycki" <macro@...am.me.uk>
Cc: Kevin Koster <lkml@...ertech.com>, Thomas Gleixner <tglx@...utronix.de>,
	Oerg866 <oerg866@...glemail.com>, linux-kernel@...r.kernel.org,
	Ingo Molnar <mingo@...hat.com>,
	Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH] x86/microcode: Fix crashes on early 486 CPUs due to
 usage of 'cpuid'.

On Tue, Apr 08, 2025 at 01:29:40PM +0100, Maciej W. Rozycki wrote:
>  Hehe...  But seriously, consuming energy is not by itself wrong, energy 
> is plentiful in the universe and gets used all the time whether humankind 
> contributes to it or not.  The issue is using dirty sources.  And that's 
> not exactly individual people's problem, it's not us personally who are to 
> build clean power stations.  Which does happen already, so we're moving in 
> the right direction.  I would be more concerned of the various industrial 
> contributors to global warming whose purpose isn't electricity production.

Oh, ofc. But we have to start somewhere. And 0.000...1% here and 0.000...1%
there helps. Considering what hw options we have currently, there's absolutely
0 need and sense to keep such machines alive.

I'm even disassembling my old test boxes because they're simply not worth it.
They almost never catch an issue and testing on them is simply waste of time
and, well, energy.

>  Plus we still need heating anyway, at least in some places, so why not 
> having one that runs Linux? ;)

You can always get a big fat modern box - it heats even more but you'll
actually get something done with it.

:-P

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette