From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750738AbVJDMW0 (ORCPT ); Tue, 4 Oct 2005 08:22:26 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750809AbVJDMW0 (ORCPT ); Tue, 4 Oct 2005 08:22:26 -0400 Received: from free.hands.com ([83.142.228.128]:12421 "EHLO free.hands.com") by vger.kernel.org with ESMTP id S1750738AbVJDMWZ (ORCPT ); Tue, 4 Oct 2005 08:22:25 -0400 Date: Tue, 4 Oct 2005 13:22:01 +0100 From: Luke Kenneth Casson Leighton To: Jason Stubbs Cc: jonathan@jonmasters.org, linux-kernel@vger.kernel.org Subject: Re: what's next for the linux kernel? Message-ID: <20051004122201.GN10538@lkcl.net> References: <20051002204703.GG6290@lkcl.net> <35fb2e590510030720t416dc210xc4e4eb11b3972822@mail.gmail.com> <20051003202239.GE8548@lkcl.net> <4341DBDC.2000309@work-at.co.jp> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4341DBDC.2000309@work-at.co.jp> User-Agent: Mutt/1.5.5.1+cvs20040105i X-hands-com-MailScanner: Found to be clean X-MailScanner-From: lkcl@lkcl.net Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Oct 04, 2005 at 10:33:16AM +0900, Jason Stubbs wrote: > Luke Kenneth Casson Leighton wrote: > > halving the microns should quadruple the speed: the distance is halved > > so light has half the distance to travel and ... darn, can't remember > > the other reason for the other factor-of-two. > > 2 dimensions? Voltage-squared. capacitance. when you go down the microns, your capacitance drops and the voltage squared goes down, too. 0.65nm is 1.2v 0.45 is aiming for 0.9 volts. silicon germanium is going to hit a limit real soon. you can't go below 0.8 volts, that's the gate "off" threshold. l. -- -- http://lkcl.net --