Re: [X86] Fwd: F29 System Wide Change: i686 Is For x86-64

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On Mon, 2018-06-04 at 17:21 +0200, Florian Weimer wrote:
> On 06/04/2018 05:07 PM, Adam Jackson wrote:
> > On Mon, 2018-06-04 at 16:04 +0200, Florian Weimer wrote:
> > 
> > > > > This proposal suggests to accept this reality and build the i686
> > > > > packages in such a way that they require the ISA level of (early)
> > > > > x86-64 CPUs.
> > > > 
> > > > On which x86 CPU families will Fedora continue to work?
> > > 
> > > Based on this proposed change, you will need an x86-64-capable CPU.
> > 
> > That's not how I read the proposal. No reason a P4 shouldn't work if
> > all you're requiring is SSE2+FXSR, right?
> 
> It will probably work, but it's more of a happy accident than a 
> deliberate decision.  I would still suggest it if it were incompatible 
> with Pentium 4 CPUs without x86-64 support.  (The fewer of these 
> Netburst power guzzlers are running, the better, to be honest.)

Certainly, I'm no netburst fan either. But the last[*] 32-bit-only
Intel chip was Yonah (Core 1), which went out of production in 2008-
ish, so there's about seven years worth of CPUs between the
introductions of SSE2 and AMD64. So this isn't eliminating the
possibility of extant i686 kernels, which "will need an x86-64-capable
CPU" might otherwise imply.

[*] - Ignoring Quark, as the rest of the market did.

- ajax
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