From owner-freebsd-current Sun Dec 6 17:55:52 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id RAA01122 for freebsd-current-outgoing; Sun, 6 Dec 1998 17:55:52 -0800 (PST) (envelope-from owner-freebsd-current@FreeBSD.ORG) Received: from ocean.campus.luth.se (ocean.campus.luth.se [130.240.194.116]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id RAA01112 for ; Sun, 6 Dec 1998 17:55:49 -0800 (PST) (envelope-from karpen@ocean.campus.luth.se) Received: (from karpen@localhost) by ocean.campus.luth.se (8.9.1/8.9.1) id CAA13609; Mon, 7 Dec 1998 02:52:40 +0100 (CET) (envelope-from karpen) From: Mikael Karpberg Message-Id: <199812070152.CAA13609@ocean.campus.luth.se> Subject: Re: New drivers and install floppy space In-Reply-To: <199812060741.XAA03107@dingo.cdrom.com> from Mike Smith at "Dec 5, 98 11:41:11 pm" To: mike@smith.net.au (Mike Smith) Date: Mon, 7 Dec 1998 02:52:40 +0100 (CET) Cc: tlambert@primenet.com, wpaul@skynet.ctr.columbia.edu, current@FreeBSD.ORG X-Mailer: ELM [version 2.4ME+ PL32 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG According to Mike Smith: > > o a mechanism for dumping drivers from the kernel after > > installation so that they need not be installed twice: > > once to boot, once to install; this probably implies > > driver data areas be mapped copy-on-write to maintain > > the data image integrity to allow it to be written > > back out > > This is actually fairly tough, as the entire ELF object is not loaded > in the first place. My preference is simply to track the driver(s) > that are loaded, and request the use re-provide the media from which > the driver was read when it comes time to copy it. Wouldn't the best and easiest solution here be something like this in the loader: save_drivers_in_ram = (total_ram_MB > 8); And if the variable is set, you just don't load the driver, you also store the complete file it was loaded from in a memory block which can then just be dumped to file. If you don't have enough memory to do that, you can ask for the disks again, instead. /Mikael To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message