From mboxrd@z Thu Jan 1 00:00:00 1970 From: Anthony Liguori Subject: Re: Balloon device in qemu? Date: Mon, 18 Aug 2008 09:03:53 -0500 Message-ID: <48A98149.9060502@us.ibm.com> References: <4891B7C2.70800@qumranet.com> <20080801190654.GA24342@dmt.cnet> <4893685B.1080409@us.ibm.com> <20080802130123.GK27246@duo.random> <489655E8.4070401@us.ibm.com> <4896BEBA.4020209@redhat.com> <20080804115649.GF11476@duo.random> <48A98069.7020104@qumranet.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Andrea Arcangeli , Gerd Hoffmann , Marcelo Tosatti , KVM list To: Avi Kivity Return-path: Received: from e1.ny.us.ibm.com ([32.97.182.141]:60912 "EHLO e1.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752762AbYHROEe (ORCPT ); Mon, 18 Aug 2008 10:04:34 -0400 Received: from d01relay02.pok.ibm.com (d01relay02.pok.ibm.com [9.56.227.234]) by e1.ny.us.ibm.com (8.13.8/8.13.8) with ESMTP id m7IE4YJx010061 for ; Mon, 18 Aug 2008 10:04:34 -0400 Received: from d01av02.pok.ibm.com (d01av02.pok.ibm.com [9.56.224.216]) by d01relay02.pok.ibm.com (8.13.8/8.13.8/NCO v9.0) with ESMTP id m7IE4X14191924 for ; Mon, 18 Aug 2008 10:04:33 -0400 Received: from d01av02.pok.ibm.com (loopback [127.0.0.1]) by d01av02.pok.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id m7IE4Xx8031787 for ; Mon, 18 Aug 2008 10:04:33 -0400 In-Reply-To: <48A98069.7020104@qumranet.com> Sender: kvm-owner@vger.kernel.org List-ID: Avi Kivity wrote: > Andrea Arcangeli wrote: >> I'm more worried about the fact that with Anthony's plan ballooning >> will be unusable for a long while on enterprise distros, as it will >> take a while before they run on a >=2.6.27 kernel. So I wonder if a >> compact layer is worth it. But surely initially we can modify >> KVM_CAP_SYNC_MMU to not be set if kernel isn't compiled with >> CONFIG_MMU_NOTIFIER=y and we can add the compact layer later if needed. >> > > I added something to hack-module.awk, so KVM_CAP_SYNC_MMU is now > reliable. Great, I'll update the balloon backend and resubmit this afternoon. Regards, Anthony Liguori