linux-kernel - Re: Drop support for x86-32

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Message-ID: <5037E845.2010306@zytor.com>
Date:	Fri, 24 Aug 2012 13:47:01 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Borislav Petkov <bp@...en8.de>, Dave Jones <davej@...hat.com>,
	"Theodore Ts'o" <tytso@....edu>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Brian Gerst <brgerst@...il.com>, wbrana <wbrana@...il.com>,
	Martin Nybo Andersen <tweek@...ek.dk>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: Drop support for x86-32

On 08/24/2012 01:25 PM, Borislav Petkov wrote:
> On Fri, Aug 24, 2012 at 04:06:42PM -0400, Dave Jones wrote:
>> On Fri, Aug 24, 2012 at 03:58:56PM -0400, Theodore Ts'o wrote:
>>
>>  > BTW, it turns out I was wrong about Linux being used on Mars.
>>  > Apparently Linux was used on the Mars Global Surveyor, as well as the
>>  > Sprit and Opportunity rovers
>>
>> citation? My recollection was that they were running VxWorks.
> 
> ... on a "a radiation-hardened version of the IBM PowerPC 750." So no
> x86.
> 
> http://www.pcmag.com/article2/0,2817,2408127,00.asp
> 

That is Curiosity (Mars Science Laboratory), not Spirit/Opportunity
(Mars Exploration Rover).

However, Wikipedia lists the CPU on the MERs as a 20 MHz IBM RAD6000
CPU, running VxWorks.

If you want x86, there are definitely newer things than 386:

	http://www.sandia.gov/media/rhp.htm

... that was almost 14 years ago now.

	-hpa
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