From owner-freebsd-questions@FreeBSD.ORG Sun Sep 4 05:51:08 2011 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 052FD1065673 for ; Sun, 4 Sep 2011 05:51:08 +0000 (UTC) (envelope-from prvs=0221c872c2=johnl@iecc.com) Received: from gal.iecc.com (gal.iecc.com [64.57.183.53]) by mx1.freebsd.org (Postfix) with ESMTP id C50888FC12 for ; Sun, 4 Sep 2011 05:51:07 +0000 (UTC) Received: (qmail 69018 invoked from network); 4 Sep 2011 05:24:26 -0000 Received: from leila.iecc.com (64.57.183.34) by mail1.iecc.com with QMQP; 4 Sep 2011 05:24:26 -0000 Date: 4 Sep 2011 05:24:04 -0000 Message-ID: <20110904052404.79122.qmail@joyce.lan> From: "John Levine" To: freebsd-questions@freebsd.org In-Reply-To: <201109040512.XAA29689@lariat.net> Organization: X-Headerized: yes Mime-Version: 1.0 Content-type: text/plain; charset=utf-8 Content-transfer-encoding: 7bit Cc: brett@lariat.net Subject: Re: Huge interrupt overhead reported after RAM added to Atom-based system X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 04 Sep 2011 05:51:08 -0000 >I'd like to experiment with having FreeBSD try to use less than the >full 4 GB (e.g., to make it act as if memory ended at, say, 3 GB) >but I'm not sure how to tell the kernel to do that. In /boot/loader.conf set "hw.physmem" to whatever size you want it to use. "man loader" for more info R's, John