Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757567Ab0GGUCr (ORCPT ); Wed, 7 Jul 2010 16:02:47 -0400 Received: from mx1.redhat.com ([209.132.183.28]:2533 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755848Ab0GGUCq (ORCPT ); Wed, 7 Jul 2010 16:02:46 -0400 Message-ID: <4C34DD1B.3010601@redhat.com> Date: Wed, 07 Jul 2010 16:01:31 -0400 From: Don Dutile Reply-To: ddutile@redhat.com User-Agent: Thunderbird 2.0.0.18 (X11/20081113) MIME-Version: 1.0 To: Stefano Stabellini CC: "stefano@stabellini.net" , "linux-kernel@vger.kernel.org" , "xen-devel@lists.xensource.com" , "sheng@linux.intel.com" , "jeremy@goop.org" Subject: Re: [PATCH 12/13] Unplug emulated disks and nics References: <1277136847-13266-12-git-send-email-stefano@stabellini.net> <4C2CEF56.4050008@redhat.com> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1379 Lines: 34 Stefano Stabellini wrote: > On Thu, 1 Jul 2010, Don Dutile wrote: >> The problem with this check/enable is that if you run >> this on an older qemu-xen that doesn't have unplug support, >> it fails pv-hvm configuration. >> >> But, all that means is that you can't use an xvd as the boot device, >> and you have to use an emulated IDE device as boot device. >> There are a couple ways to configure the vnif correctly (in guest >> or in xen guest config file). >> >> So, on an older (say, rhel5) xen, I don't have this check; >> the boot device is required to be spec'd as hda, not vda, and >> xen-blkfront is not allowed to configure blk major nums >> for IDE (& SCSI) (to avoid 2 drivers twiddling w/same phys backend... not good!). >> > > Who is requiring that the boot device is spec'd as hda and not xvda? > I don't think there is such limitation in xend or libxl at the moment. > If you take a previous xen HVM guest spec & just run it on a guest that has pv-hvm added to it, then one has hda spec'd as boot device (by default, by not editing the guest config spec/file). Ideally, both config specs should/would work. - Don -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/