linux-kernel - Re: [patch] CFS scheduler, -v8

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Message-ID: <20070508053627.GS11166@waste.org>
Date:	Tue, 8 May 2007 00:36:27 -0500
From:	Matt Mackall <mpm@...enic.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Esben Nielsen <nielsen.esben@...glemail.com>,
	Ingo Molnar <mingo@...e.hu>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Con Kolivas <kernel@...ivas.org>,
	Nick Piggin <npiggin@...e.de>, Mike Galbraith <efault@....de>,
	Arjan van de Ven <arjan@...radead.org>,
	Peter Williams <pwil3058@...pond.net.au>,
	Thomas Gleixner <tglx@...utronix.de>, caglar@...dus.org.tr,
	Willy Tarreau <w@....eu>,
	Gene Heskett <gene.heskett@...il.com>, Mark Lord <lkml@....ca>,
	Zach Carter <linux@...hcarter.com>,
	buddabrod <buddabrod@...il.com>
Subject: Re: [patch] CFS scheduler, -v8

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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