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Date: Tue, 8 May 2007 00:36:27 -0500
From: Matt Mackall <mpm@selenic.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Esben Nielsen <nielsen.esben@googlemail.com>, Ingo Molnar <mingo@elte.hu>,
       Balbir Singh <balbir@linux.vnet.ibm.com>, linux-kernel@vger.kernel.org,
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       buddabrod <buddabrod@gmail.com>
Subject: Re: [patch] CFS scheduler, -v8
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References: <20070501212223.GA29867@elte.hu> <463854F3.3020403@linux.vnet.ibm.com> <20070502100545.GA6857@elte.hu> <46386F2B.9050307@linux.vnet.ibm.com> <20070502111742.GA18132@elte.hu> <Pine.LNX.4.64.0705051016420.12880@frodo.shire> <alpine.LFD.0.98.0705051040420.3819@woody.linux-foundation.org> <Pine.LNX.4.64.0705071159530.14011@frodo.shire> <alpine.LFD.0.98.0705070921390.3802@woody.linux-foundation.org>
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On Mon, May 07, 2007 at 09:28:32AM -0700, Linus Torvalds wrote:
> 
> 
> On Mon, 7 May 2007, Esben Nielsen wrote:
> > 
> > What is (long)(a-b) ? I have tried to look it up in the C99 standeard but I
> > can't find it. Maybe it is in the referred LIA-1 standeard, which I can't find
> > with google.
> 
> I don't worry about non-2's-complement machines (they don't exist, and 
> likely won't exist in the future either).

They do exist. And they run Linux. SLES9 in fact.

http://en.wikipedia.org/wiki/UNIVAC_1100/2200_series#UNISYS_ClearPath_IX_series

http://www.unisys.com/eprise/main/admin/corporate/doc/ClearPath_Plus_Dorado_Model_390_Server_Specification_Sheet.pdf

That machine is a direct descendant of the Univac 1101 from 1950 and
is still software-compatible with 1107s from 1962.

(Granted, they only run Linux on the x86 side.)

-- 
Mathematics is the supreme nostalgia of our time.
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