From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: [RFC] Deferred interrupt handling. Date: Thu, 19 Jul 2007 12:23:24 +0300 Message-ID: <469F2D8C.7020805@qumranet.com> References: <005901c7c921$79c006c0$6d401440$@com> <20070718123040.615795b7@the-village.bc.nu> <64F9B87B6B770947A9F8391472E032160CC16C92@ehost011-8.exch011.intermedia.net> <20070718174736.0baf6d0e@the-village.bc.nu> <469E43D5.70802@qumranet.com> <20070718191433.GB24545@csclub.uwaterloo.ca> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org, Alan Cox , linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Lennart Sorensen Return-path: In-Reply-To: <20070718191433.GB24545-1wCw9BSqJbv44Nm34jS7GywD8/FfD2ys@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: kvm.vger.kernel.org Lennart Sorensen wrote: > On Wed, Jul 18, 2007 at 07:46:13PM +0300, Avi Kivity wrote: > >> IMO the only reasonable solution is to disallow interrupt forwarding >> with shared irqs. If someone later comes up with a bright idea, we can >> implement it. Otherwise the problem will solve itself with hardware >> moving to msi. >> > > Disallowing shared IRQs means disallowing PCI devices in general, so now > you are back to ISA only devices, which it sounds like were the only > things already allowed by vm86 or whatever it was for passing through. > > No, it means disallowing pci devices that use shared irqs, and allowing pci devices that use non-shared irqs. > Certainly does appear to have potential though for allowing more > interesting virtual machines. > IMO pass-through is counter to most of the benefits of virtualization. But users seem to want it. -- error compiling committee.c: too many arguments to function ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/