From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: User space for lapic2 Date: Mon, 09 Jul 2007 16:00:39 +0300 Message-ID: <46923177.7080807@qumranet.com> References: <10EA09EFD8728347A513008B6B0DA77A01B8F537@pdsmsx411.ccr.corp.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org To: "Dong, Eddie" Return-path: In-Reply-To: <10EA09EFD8728347A513008B6B0DA77A01B8F537-wq7ZOvIWXbNpB2pF5aRoyrfspsVTdybXVpNB7YpNyf8@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 Dong, Eddie wrote: > Avi: > To make lapic code into mainline earlier, I am thinking what > should the user space code look like. If we wait till lapic branch has > all same functionality as mainline have today i.e. live migration, all > guests etc, we may have very long way to go given that only Greg (temply > off), me have contribution to the code besides you. So what I am > thinking is to reduce the bar to "no regression", which means a user > space command to choice kernel pic/apic. When choosing user pic/apic, we > make sure everything works including livemigration and all known good > guests; if choosing kernel pic/apic, we have better performance but > some feature lagging such as live migration. > Does this make sense? If yes, How about command option "-irqchip > k" and "-irqchip u"? the default value is user. > That doesn't work; one day we'll make kernel apic the default, and then that new userspace won't work with kernels that have in-kernel pic but not lapic. -- 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/