From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pigeon.gentoo.org ([69.77.167.62] helo=lists.gentoo.org) by finch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1LTKZB-00083z-Bk for garchives@archives.gentoo.org; Sat, 31 Jan 2009 18:27:41 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 02B32E029E; Sat, 31 Jan 2009 18:27:40 +0000 (UTC) Received: from mta11.charter.net (mta11.charter.net [216.33.127.80]) by pigeon.gentoo.org (Postfix) with ESMTP id CFAEAE029E for ; Sat, 31 Jan 2009 18:27:39 +0000 (UTC) Received: from aarprv04.charter.net ([10.20.200.74]) by mta11.charter.net (InterMail vM.7.09.01.00 201-2219-108-20080618) with ESMTP id <20090131182737.HQVD21265.mta11.charter.net@aarprv04.charter.net> for ; Sat, 31 Jan 2009 13:27:37 -0500 Received: from agaffney.org ([71.81.81.248]) by aarprv04.charter.net with ESMTP id <20090131182737.NIUY25639.aarprv04.charter.net@agaffney.org> for ; Sat, 31 Jan 2009 13:27:37 -0500 Received: from [192.168.0.10] (kagome [192.168.0.10]) by agaffney.org (Postfix) with ESMTP id 14F531E0045 for ; Sat, 31 Jan 2009 12:27:37 -0600 (CST) Message-ID: <49849819.9080001@gentoo.org> Date: Sat, 31 Jan 2009 12:27:37 -0600 From: Andrew Gaffney User-Agent: Thunderbird 2.0.0.18 (X11/20081204) Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-dev@lists.gentoo.org Reply-to: gentoo-dev@lists.gentoo.org MIME-Version: 1.0 To: gentoo-dev@lists.gentoo.org Subject: Re: [gentoo-dev] Advice regarding backporting to Gentoo from Tin Hat. References: <49846C7A.9000004@opensource.dyc.edu> In-Reply-To: <49846C7A.9000004@opensource.dyc.edu> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Chzlrs: 0 X-Archives-Salt: 1bdf00be-9c78-4a1d-8403-781baceabfc4 X-Archives-Hash: bc96785abb8317f289bff6ef16558324 basile wrote: > Point 4 is what I think would be useful to Gentoo mainstream. The > speed one gets from RAM totally beats a LiveCD using unionfs which has > to periodically return to the slow cdrom. This is already possible. With current genkernel (genkernel-9999 or genkernel-3.4.10.903), you can boot with 'docache unionfs', which will copy the squashfs to tmpfs, mount it, and then use unionfs-fuse to create a union with another tmpfs. Genkernel has offered the 'docache' option for quite a while, which has mostly the safe effect, but without the unionfs, it uses nasty tricks like copying some stuff to a tmpfs and then doing lots of symlinks into the squashfs. Either way, it's entirely memory based after initial boot. -- Andrew Gaffney http://dev.gentoo.org/~agaffney/ Gentoo Linux Developer Catalyst/Genkernel + Release Engineering Lead