From owner-freebsd-hackers Wed Dec 5 7:17:26 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from dan.emsphone.com (dan.emsphone.com [199.67.51.101]) by hub.freebsd.org (Postfix) with ESMTP id E818137B405; Wed, 5 Dec 2001 07:17:21 -0800 (PST) Received: (from dan@localhost) by dan.emsphone.com (8.11.6/8.11.6) id fB5FHHA78393; Wed, 5 Dec 2001 09:17:17 -0600 (CST) (envelope-from dan) Date: Wed, 5 Dec 2001 09:17:16 -0600 From: Dan Nelson To: Varshavchick Alexander Cc: Jesper Skriver , freebsd-hackers@FreeBSD.ORG Subject: Re: 4G phisical memory kernel trap Message-ID: <20011205151716.GC27496@dan.emsphone.com> References: <20011205140406.A32786@skriver.dk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.3.23.2i X-OS: FreeBSD 5.0-CURRENT X-message-flag: Outlook Error Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG In the last episode (Dec 05), Varshavchick Alexander said: > On Wed, 5 Dec 2001, Jesper Skriver wrote: > > On Wed, Dec 05, 2001 at 03:57:22PM +0300, Varshavchick Alexander wrote: > > > I have a PIII box with 4G phisical memory and FreeBSD 4.2 and it > > > traps while booting - "fatal trap 12 page fault". With less than > > > 4G memory the server is working good. There is no MAXMEM option > > > in the kernel (as is by default). What would you suggest to make > > > this box running with 4G? May be, specifying MAXMEM slightly less > > > than 4G, or what else? Thank you. > > > > Try upgrading it to 4.4-STABLE, there has been dome some work > > regarding this since 4.2 > > As the matters stand, it's a heavily loaded working system and I > can't afford experimenting with any major system changes. Tweaking > kernel, boot loaded are allowed, but not major version upgrades. You can run a 4.4 kernel on a 4.2 userland with no problem. On some of my production boxes, I'm running a 4.4 kernel on a 4.0 userland :) You should be able to build a 4.4 kernel, copy it to /kernel.test, and do a quick reboot to see if it works. That way you can fall back to the 4.2 kernel if you have problems. -- Dan Nelson dnelson@allantgroup.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message