From owner-freebsd-hackers Sun Mar 14 10:40:55 1999 Delivered-To: freebsd-hackers@freebsd.org Received: from bugs.us.dell.com (bugs.us.dell.com [143.166.169.147]) by hub.freebsd.org (Postfix) with ESMTP id D094614CAF for ; Sun, 14 Mar 1999 10:40:52 -0800 (PST) (envelope-from tony@dell.com) Received: from ant (ant.us.dell.com [143.166.12.34]) by bugs.us.dell.com (8.8.8/8.8.8) with SMTP id MAA08350; Sun, 14 Mar 1999 12:39:26 -0600 (CST) (envelope-from tony@dell.com) Message-Id: <3.0.6.32.19990314123925.039187c0@bugs.us.dell.com> X-Sender: tony@bugs.us.dell.com X-Mailer: QUALCOMM Windows Eudora Light Version 3.0.6 (32) Date: Sun, 14 Mar 1999 12:39:25 -0600 To: Sheldon Hearn , "Daniel C. Sobral" From: Tony Overfield Subject: Re: Proposal: Define MAXMEM in GENERIC Cc: hackers@FreeBSD.ORG In-Reply-To: <63209.921431112@axl.noc.iafrica.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG >... since we're >likely to see more and more people having problems related to failed >speculative memory probes as >64MB machines become entry-level. Since all(*) new machines support INT 15h AX=E820h, and FreeBSD now seems to be able to use it, why not have the speculative probe default to disabled in GENERIC and use a boot option to enable probing support for those very few older systems that supported more than 64MB or 16MB but did _not_ yet support E820h (or E801h)? (*) Good bet if the machine supports MS-Windows. p.s. FreeBSD seems to prefer E801h over E820h. I'd like to see it the other way around, since you could gain almost 64 KB of extra memory in some cases. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message