From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sc8-sf-mx1-b.sourceforge.net ([10.3.1.11] helo=sc8-sf-mx1.sourceforge.net) by sc8-sf-list1.sourceforge.net with esmtp (Exim 4.30) id 1AilJG-0002JE-Ca for user-mode-linux-devel@lists.sourceforge.net; Mon, 19 Jan 2004 18:08:06 -0800 Received: from mta11.adelphia.net ([68.168.78.205]) by sc8-sf-mx1.sourceforge.net with esmtp (Exim 4.30) id 1AilJG-0006eo-2H for user-mode-linux-devel@lists.sourceforge.net; Mon, 19 Jan 2004 18:08:06 -0800 Received: from mizar.alcor.net ([68.64.159.24]) by mta11.adelphia.net (InterMail vM.5.01.06.05 201-253-122-130-105-20030824) with ESMTP id <20040120020757.ECQJ11898.mta11.adelphia.net@mizar.alcor.net> for ; Mon, 19 Jan 2004 21:07:57 -0500 Received: from mdz by mizar.alcor.net with local (Exim 4.30) id 1AilJ5-0000Pq-F9 for user-mode-linux-devel@lists.sourceforge.net; Mon, 19 Jan 2004 18:07:55 -0800 From: Matt Zimmerman Subject: Re: [uml-devel] Re: more on COW (long) Message-ID: <20040120020755.GF16181@alcor.net> References: <20040119.155346.-522689.0.mcmechanjw@juno.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20040119.155346.-522689.0.mcmechanjw@juno.com> Sender: user-mode-linux-devel-admin@lists.sourceforge.net Errors-To: user-mode-linux-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Id: The user-mode Linux development list List-Post: List-Help: List-Subscribe: , List-Archive: Date: Mon, 19 Jan 2004 18:07:55 -0800 To: user-mode-linux-devel@lists.sourceforge.net On Mon, Jan 19, 2004 at 03:53:43PM -0800, James W McMechan wrote: > The setup in that case would be to use losetup to make devices using > one for each COW and backing file so you can only have 1/2 of the > available loops used for COW files and the other 1/2 as the backing > files i.e. 4 COW files with 4 backing files from 8 loop back devices > the usual default, as of Feb 2002 you can now have up to 256 loop > devices. But I think that a hard limit of 128 COW files per system is > too small, and if the max_loop is left at the default of 8... 4 COW files > per system would be a great pain, (yes, if they all use the exact same > backing file you could get 255 or 7) Why do you need loop devices? Doing COW in the UML kernel can deal with ubd block devices instead. This means chewing up two ubd devices for each COW device, though, and I think is the opposite direction of where Jeff wants to go. -- - mdz ------------------------------------------------------- The SF.Net email is sponsored by EclipseCon 2004 Premiere Conference on Open Tools Development and Integration See the breadth of Eclipse activity. February 3-5 in Anaheim, CA. http://www.eclipsecon.org/osdn _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel