From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jacob Gorm Hansen Subject: Re: disk throttling Date: Fri, 12 Nov 2004 15:17:09 +0100 Message-ID: <4194C5E5.70404@melon.dk> References: <4193A0DF.50208@mcs.anl.gov> <200411111909.33405.mark.williamson@cl.cam.ac.uk> <4194BAE9.3030405@melon.dk> <200411121412.04191.mark.williamson@cl.cam.ac.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <200411121412.04191.mark.williamson@cl.cam.ac.uk> Sender: xen-devel-admin@lists.sourceforge.net Errors-To: xen-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: xen-devel@lists.sourceforge.net Cc: mark.williamson@cl.cam.ac.uk List-Id: xen-devel@lists.xenproject.org Mark A. Williamson wrote: >>Has the plan of turning Xen into a next-gen BIOS been scrapped? It seems >>Xen is becoming more and more dependent on having a specific version of >>Linux as dom0? > > > Our proposed next-gen architecture now consists of: > * Safe Hardware Interface - restricted access to machine resources (memory, IO > regions...). Provided by Xen itself. > * Next gen "BIOS controller" - general machine management... It runs all the > time rather than just at bootup. > * Driver domains - device drivers scheduled pre-emptively, with restricted > hardware access > * Virtual machines - run user applications In this setup, where would stuff like the net filter be placed? In the network driver domain? How would one register the IP address of a new domain? It would be really cool to be able to run without a full Linux just for drivers. How much work do you think it would be to port one of the pre-NGIO Xen drivers to run in a separate VM? I know you guys focus primarily on server-class machines, but I am dreaming of running Xen on a 1000+ node cluster we have here, and with the current mem usage of dom0 (according to postings on this list it has a hard time coping on 32megs or less), this would waste at least 32 gigabytes of mem, just for dom0s. Jacob ------------------------------------------------------- This SF.Net email is sponsored by: Sybase ASE Linux Express Edition - download now for FREE LinuxWorld Reader's Choice Award Winner for best database on Linux. http://ads.osdn.com/?ad_id=5588&alloc_id=12065&op=click