linux-kernel - Re: [PATCH] x86: Drop 32-bit support ... finally.

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Message-ID: <20150401154155.08f796db@lxorguk.ukuu.org.uk>
Date:	Wed, 1 Apr 2015 15:41:55 +0100
From:	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	Robert Richter <rric@...nel.org>, Borislav Petkov <bp@...en8.de>,
	LKML <linux-kernel@...r.kernel.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Tony Luck <tony.luck@...el.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Andy Lutomirski <luto@...capital.net>,
	Matt Fleming <matt@...eblueprint.co.uk>,
	Jörg Rödel <joro@...tes.org>,
	Jiri Kosina <jkosina@...e.cz>, Jeff Mahoney <jeffm@...e.com>,
	Michal Hocko <mhocko@...e.cz>,
	Vlastimil Babka <vbabka@...e.cz>,
	Andre Przywara <andre@...rep.de>,
	Andreas Herrmann <herrmann.der.user@...il.com>,
	Richard Weinberger <richard@....at>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andi Kleen <andi@...stfloor.org>
Subject: Re: [PATCH] x86: Drop 32-bit support ... finally.

> We really don't want to have this unmaintainable mixture of:
> 
> 	128-bit support
> 	 64-bit support (legacy mode)
> 	 32-bit support (compat mode)
> 	 16-bit support (vm86 mode)
> 	  8-bit support (UART mode)
> 
> ... all in the same kernel!

I think a lot of us working on other free Unixlike OS platforms have
reached a similar conclusion. It's a natural segmentation. The final
commit should include the following helpful table


	Bits		Free Unixlike OS
        ---------------------------------
	8bit		FUZIX
	16bit		ELKS
	32bit		NetBSD/FreeBSD
	64bit		Linux

(For 18 and 36bit consult a specialist.. probably a medical one)

Alan
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