October 2009 - virt - Fedora Mailing-Lists

by Tim Richardson

I'm trying to install xp virtual machine from an .iso on the disk, I have a virtual machine called localhost with qemu as ID. It has a storage area at /var/lib/libvirt/images, i'm right clicking on that and choosing new then following the wizard but it keeps failing whilst creating the domain. Is anyone familiar with this scenario or have any suggestions? regards Tim Unable to complete install '<class 'libvirt.libvirtError'> internal error Domain microXP didn't show up Traceback (most recent call last): File "/usr/share/virt-manager/virtManager/create.py", line 1501, in do_install dom = guest.start_install(False, meter = meter) File "/usr/lib/python2.6/site-packages/virtinst/Guest.py", line 541, in start_install return self._do_install(consolecb, meter, removeOld, wait) File "/usr/lib/python2.6/site-packages/virtinst/Guest.py", line 633, in _do_install self.domain = self.conn.createLinux(install_xml, 0) File "/usr/lib64/python2.6/site-packages/libvirt.py", line 974, in createLinux if ret is None:raise libvirtError('virDomainCreateLinux() failed', conn=self) libvirtError: internal error Domain microXP didn't show up '

14 years, 6 months

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suggestion: a service for tuning ksm according to memory load

by Dan Kenigsberg

If you are running a number of qemu-kvm's with similar guests, you can gain a lot of memory by using ksm properly. An unattended host running a variable number of qemu-kvm's needs to tune ksm automatically, since when memory is tight, it's better to spend more cpu on merging pages. In more relaxed cases, it's just a waste of time. The attached service tries to do just that. It monitors how much memory is used by qemu-kvm processes, and starts ksm when a threshold is passed. Ksm usually manages to free up some memory. As long as memory used by qemu is above the defined threshold, ksm tries harder and harder to share memory pages (up to a limit). This may happen if a guest starts working and consumes new memory. If there's enough free memory, ksm cools down. Ksmd service has the usual start/status/stop verbs, and an additional one: signal. One should use that verb just after one starts a new qemu-kvm process or just after such process dies, to let ksm adjust immediately. Comments and suggestion are welcome. Thanks, Dan.

14 years, 6 months

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virt-viewer windows port

by anuj rampal

Hi all, I have build virt-viewer-0.2.0 for windows. now when I tried to run that "virt-viewer.exe" for the 1st time. it gave me this error: (virt-viewer.exe:8464): Pango-WARNING **: `Z:\usr\i686-pc-mingw32\sys-root\mingw \lib\pango\1.6.0\modules\pango-basic-win32.dll': The specified module could not be found. To solve this I had to rename one of my Disk to Z and the copied the pango-basic-win32.dll at the specified path. now it didnt give me any error. But what happens now is: 1. virt-viewer.exe -c qemu+tcp://192.168.1.106/session 1 ; where 192.168.1.106 is the ip address of my machine where qemu is running and 1 is the id of the VM. 2. A blank screen opens up with "virt-viewer.exe" written on its top and then that program does not responds. Could someone please help me out with this. Thanks in advance Regards Anuj

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[ANNOUNCE] virt-top 1.0.4

by Richard W.M. Jones

virt-top is the sane replacement for xentop. Virt-top looks and acts like the familiar top(1) command, displays virtual machines, and uses libvirt so it works with just about every virtualization system out there. It also has cool features for sysadmins, like you can use it to log stats into a database or spreadsheet. This version fixes a few long-standing bugs, particularly in the handling of languages other than English. We've also tidied up the source and moved to using git for source control. Home page: http://et.redhat.com/~rjones/virt-top/ Source: http://et.redhat.com/~rjones/virt-top/files/ Repo: http://git.et.redhat.com/?p=virt-top.git;a=summary My blog: http://rwmj.wordpress.com/tag/virt-top/ There's already a build in Fedora 13 which will probably work in earlier versions of Fedora: http://koji.fedoraproject.org/koji/packageinfo?packageID=6211 Rich. -- Richard Jones, Emerging Technologies, Red Hat http://et.redhat.com/~rjones virt-df lists disk usage of guests without needing to install any software inside the virtual machine. Supports Linux and Windows. http://et.redhat.com/~rjones/virt-df/

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virt-manager and manually created bridges

by Sven Lankes

My home-server is running rawhide. To get some virtual machines working on it I did: * disable Networkmanager * setup a br0-Device that includes eth0 * disable the libvirt default network virbr0 using virsh net-autostart default --disable When I now try to install a new vm using virt-manager this fails: I'm asked (under advanced options) to choose a network - the only network available ist the (deactivated) virbr0 network. When I then try to proceed anyway I am told that the virbr0 is inactive and would I like to start it. Choosing no doesn't allow me to finish the installation wizard. When I edit an xml definition manually to add the br0-Bridge as network device things work fine. Shouldn't this be possible from within virt-manager? -- sven === jabber/xmpp: sven(a)lankes.net

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Fedora virt status

by Mark McLoughlin

Fedora 12 ========= The Fedora 12 release is drawing closer and closer. Beta is on its way out the door and release candidate composes will begin in less than four weeks time. Helping Out =========== Here are three ways you could help out with getting F12 into great shape: 1) Test, test, test and file bugs. The more stuff you break, the more will get fixed. Maybe you could even write some test cases; for examples, just take a look at: https://fedoraproject.org/wiki/Test_Day:2009-09-17_Virtualization https://fedoraproject.org/wiki/Test_Day:2009-05-07_Virtualization 2) Follow the action in bugzilla. See this wiki page for how to sign up to receive all bugzilla emails relating to Fedora virtualization: https://fedoraproject.org/wiki/Virtualization_bugs 3) Take a look at some existing bugs and see if you can help out getting them closed. A good place to start is the F12 target list: https://bugzilla.redhat.com/showdependencytree.cgi?id=F12VirtTarget&hide_... But be warned, you may quickly find yourself becoming a package co-maintainer! :-) Test Day ======== Earlier this month, a dedicated bunch of folks got together on irc for the day to see what they could break: https://fedoraproject.org/wiki/Test_Day:2009-09-17_Virtualization To give you an idea of the success of the day, here's a selection of the bugs reported: https://bugzilla.redhat.com/523953 (mbanas) libvirtd segfault with NIC hot-unplug https://bugzilla.redhat.com/524012 (vbenes) libvirt cannot hot-unplug devices which were not previously hot-plugged https://bugzilla.redhat.com/524022 (vbenes) qemu gets confused with NIC hotplug when no model is specified https://bugzilla.redhat.com/523914 (jdenemar) Mouse does not move in PV Xen guest under RHEL-5.4 https://bugzilla.redhat.com/523941 (jdenemar) kernel 2.6.31-1[24].fc12 doesn't boot in xen PV guest https://bugzilla.redhat.com/523971 (jdenemar) xm save hangs with kernel-2.6.31-14.fc12 running as a PV guest under RHEL-5.4 https://bugzilla.redhat.com/523939 (mrezanin) Save on restored machine failed https://bugzilla.redhat.com/523623 (drjones) grub.conf needs console=hvc0 in kernel command-line when installed as DomU https://bugzilla.redhat.com/524039 (drjones) block device cannot be detached from DomU https://bugzilla.redhat.com/524052 (drjones) Boot hang when installing HVM DomU https://bugzilla.redhat.com/524035 (vbenes) libvirt should support USB device detach https://bugzilla.redhat.com/524045 (vbenes) accessing non existing usb device cause guest to stop https://bugzilla.redhat.com/523158 (santwana) libvirtd segault during virsh restore https://bugzilla.redhat.com/523956 (clalance) Starting libvirtd by hand causes denials https://bugzilla.redhat.com/523970 (jstodola) virsh help output not sorted https://bugzilla.redhat.com/523993 (clalance) KVM Live migration failure with SELinux Enforcing https://bugzilla.redhat.com/524047 (gianluca) virt-viewer outputs nothing if connecting to a non existent VM https://bugzilla.redhat.com/522683 (plambert) USB devices do not mount and are not seen by 12-alpha KVM https://bugzilla.redhat.com/523948 (phan) VM cannot boot from the disk converted by qemu-img https://bugzilla.redhat.com/524229 (santwana) Local migration of kvm guest fails in Fedora12 Alpha https://bugzilla.redhat.com/524268 (santwana) KVM guest fails to start up after virt-snapshot in Fedora12 https://bugzilla.redhat.com/524033 (jstodala) libvirt should check the permissions on all paths before starting qemu https://bugzilla.redhat.com/523960 (mnowak) virtinst saves images where qemu can't access them by default https://bugzilla.redhat.com/517379 (adamw) virt-manager should warn if guest images will are not readable by qemu https://bugzilla.redhat.com/524083 (emcnabb) virt-manager storage "Allocation" field can be set higher than "Max Capacity" https://bugzilla.redhat.com/524085 (emcnabb) Help button on virt-manager "New Storage Volume" page broken https://bugzilla.redhat.com/524109 (lmr) virt-manager: Fails to install guest using ISO file - internal error unable to start guest: qemu: 'iso' invalid format https://bugzilla.redhat.com/524111 (lmr) virt-manager can't hold pointer grab on VMs (VNC mode) https://bugzilla.redhat.com/524117 (lmr) virt-manager: Error installing guests - can't mount the / filesystem after the install process is finished https://bugzilla.redhat.com/524118 (P Rauser) NFS4 connection to virtual guest NFS4 server fails over bridged interface https://bugzilla.redhat.com/524205 (vbenes) virt-manager cloning operations should be cancelable Merging Lists ============= Jon Stanley raised the issue again of whether the fedora-virt and fedora-xen mailing lists should be merged: http://www.redhat.com/archives/fedora-virt/2009-October/thread.html#00000 It looks like we'll do this when the lists switch over to the lists.fedoraproject.org server. virt-dostuff ============ Rich Jones announce another couple of tools in the ever growing libguestfs toolsuite, virt-rescue and virt-edit: http://www.redhat.com/archives/fedora-virt/2009-September/msg00099.html Bugs ==== DOOM-O-METER: 198 bugs open now, 214 open three weeks ago. Progress! The Fedora 12 blocker list is: https://bugzilla.redhat.com/showdependencytree.cgi?id=F12VirtBlocker&hide... and the Fedora 12 target list is: https://bugzilla.redhat.com/showdependencytree.cgi?id=F12VirtTarget&hide_... All these queries can be found on: https://fedoraproject.org/wiki/Virtualization_bugs Ongoing Bugs ============ == kernel == https://bugzilla.redhat.com/526869 Add virtio_blk support cache flush (VIRTIO_BLK_F_FLUSH) Christoph points out that we should make sure F-12 virtio_blk supports cache flushing for future host versions. https://bugzilla.redhat.com/525890 Backport virtio patches for optimised virtio-net Some debate about whether backporting some changes from 2.6.32 virtio_net is worth the risk. https://bugzilla.redhat.com/524508 kvm regression between 2.6.29 and 2.6.30 causes guest to become unresponsive Reporter has confirmed that his KVM hangs are a regression between 2.6.29 and 2.6.30. https://bugzilla.redhat.com/523900 Garbage in KVM guest console when guest runs kernel 2.6.30.5-43.fc11 A video console under KVM regression between 2.6.29 and 2.6.30. https://bugzilla.redhat.com/524808 kernel-2.6.31-33.fc12.x86_64 fail to boot with VT-d enabled and intel_iommu=on https://bugzilla.redhat.com/490477 [Intel IOMMU] Using isochronous DMAR unit on ICH10 board causes _other_ DMAR unit to stop working. David Woodhouse continues fighting away at VT-d bugs. == misc == https://bugzilla.redhat.com/501720 upstart does not launch a login process on /dev/hvc0 in all cases Since virtio_console is undergoing major changes, we've punted this until Fedora 13. https://bugzilla.redhat.com/492082 Re-phrase anaconda's terrifying "uninitialized drive" warning Looks like anaconda devs just want to close this. https://bugzilla.redhat.com/523296 When Qemu/SDL is fullscreen xrandr dual-monitor configuration breaks Looks like SDL's fullscreen support can somehow screw up xrandr configuration. == qemu == https://bugzilla.redhat.com/524734 KVM guest ext3 errors at shutdown when using virtio and a qcow2 backing file An Ubuntu guest on F12 using a qcow2 backing file and virtio sees ext3 errors. https://bugzilla.redhat.com/526381 qcow2 performance bad under i/o load Quite worrying given tha qcow2 performance is an F-12 feature. However, it looks like this may be just that these are compressed qcow2 which are not expected to have good performance. https://bugzilla.redhat.com/526777 Guest PXE booting doesn't work when using ne2k_pci NIC model https://bugzilla.redhat.com/526776 Add rtl8209 to gpxe-roms-qemu Eduardo points out that we're including the wrong PXE ROM for ne2k_pci. This is also true in F-11. https://bugzilla.redhat.com/523312 KVM guest freezes during DesktopBSD 1.7 installation This issue on a Fedora 11 host sounds like it might be storage related. https://bugzilla.redhat.com/523592 qemu-kvm segfault when attaching USB audio device We have a stack trace for this main loop segfault on F11 with USB passthrough. https://bugzilla.redhat.com/524723 Windows XP KVM gets BSOD with HP all-in-one usb device attached An issue with USB passthrough on Fedora 11. https://bugzilla.redhat.com/503156 qemu VNC :: xterm inside VM shows garbled text A patch destined for 0.10.7 that should have fixed this has, in fact, made things worse. == libvirt == https://bugzilla.redhat.com/524732 org.libvirt.manage policy kit denial Tom Horsley is seeing polkit denials with virsh and virt-maanger. https://bugzilla.redhat.com/517157 libvirt fails to start guest on NFS even when sebool virt_use_nfs is on F12 has a fix to handle EOPNOTSUPP from setfilecon() when running on NFS. Need this in F11 too. https://bugzilla.redhat.com/516430 libvirt cannot re-label a disk image under an NTFS partition Looks like a similar issue to the NFS one, except we don't have a virt_use_ntfs sebool. https://bugzilla.redhat.com/524770 'virsh vol-path' command doesn't support "name" parameter https://bugzilla.redhat.com/524776 Describe vol-key vol-path, vol-name commands wrongly in help doc Some of the storage volume commands seem to be quite messed up ever since they were introduced. https://bugzilla.redhat.com/525073 cannot delete storage pool with virsh pool-delete Another issue with virsh's storage commands. https://bugzilla.redhat.com/526769 libvirt logrotate settings should roll over weekly instead of daily libvirt's logrotate settings are proving to be quite annoying, so we're switching it to only roll-over weekly. == virt-manager == https://bugzilla.redhat.com/522823 virt-manager doc screenshots are outdated The Fedora 12 version of virt-manager has a radically different UI, but the help documentation hasn't been updated yet. https://bugzilla.redhat.com/522720 virt-manager cloning a guest with a 3Gib image creates a 23Gib image virt-manager appears to get confused about image sizes when cloning a guest. https://bugzilla.redhat.com/524297 F11 virt-manager doesn't allow KVM memory ballooning Looks like this is fixed in F12, so it's purely a case of whether we should make the effort to fix in F11 too. https://bugzilla.redhat.com/526077 virt-manager toolbar buttons should have tooltips According to the GNOME HIG, all toolbar buttons should have tooltips, especially ones without a label. https://bugzilla.redhat.com/526076 some virt-manager toolbar icons are blurry Eagle eyed Michael Monreal spotted that some of virt-manager's new icons seem to be blurry due to inappropriate scaling. He even included a nice screenshot demonstrating the problem. https://bugzilla.redhat.com/526111 virt-manager add storage volume allows an empty name field Minor problem with virt-manager not checking the volume name text entry for data. https://bugzilla.redhat.com/526488 virt-manager's 'Details' dialog has a poorly placed 'Remove' button https://bugzilla.redhat.com/526491 virt-manager has no confirmation dialog when deleting a virtual disk Matt Booth accidentally deleted a few guest images because of a combination of these bugs. https://bugzilla.redhat.com/526648 virt-maanger's "New VM" window disappears when connection expander is closed Yet another minor virt-manager UI quirklet. == virt-clone == https://bugzilla.redhat.com/524269 virt-clone should demove old udev rules when changing MAC address Could be implemented using libguestfs. == xen == https://bugzilla.redhat.com/523914 Mouse does not move in PV Xen guest under RHEL-5.4 A rather interesting, complex, twisty bug report detailing why xen and evdev have conspired to break the mouse in Fedora 12 Xen guests. https://bugzilla.redhat.com/523489 32-bit rawhide xen kernel spins 100% cpu booting on CentOS 5.2 Dom0 Xen DomU boot failure. Resolved Bugs ============= == misc == https://bugzilla.redhat.com/507397 Directory permissions on volume group directory too restrictive This blocker issue with lvm2 was first fixed by a large change to using udev, but that broken anaconda so it was reverted, and then it was fixed by a much more minor change. == kernel == https://bugzilla.redhat.com/520119 virtio_net page allocation failure Rusty came up with a fix for this in 2.6.31, so we need to backport it to 2.6.30 in Fedora 11. https://bugzilla.redhat.com/524229 Local migration of kvm guest fails in Fedora12 Alpha A PVMMU bug which has been fixed in 2.6.31. https://bugzilla.redhat.com/509383 rotational mode is much faster for virtio-blk disks, but uses non-rotational mode by default Justin has applied Christoph's fix for this in rawhide and F-11. https://bugzilla.redhat.com/512358 Unable to boot using qemu-kvm and gPXE from virt-preview repository This is now fixed in Fedora 11. == qemu == https://bugzilla.redhat.com/524022 qemu's pci_add monitor command should not exit() if the NIC model is not valid Markus fixed this upstream and the patches have now been pulled into F12. https://bugzilla.redhat.com/524695 qemu should print strerror info for disk/kernel/initrd access errors Cole points out that since we're getting a lot of problems with qemu not being able to access files since we made it run as an unprivileged user, we should really fix qemu's error messages. Justin has sent a patch upstream and included it for F12. https://bugzilla.redhat.com/522683 svirt blocks USB passthrough, even with virt_use_usb enabled - /sys/bus/usb/devices Looks like svirt is breaking USB passthrough by blocking access to /sys/bus/usb/devices. Dan Walsh fixed this in rawhide. https://bugzilla.redhat.com/522994 KVM Fedora 11 guest networking fails with latest (2.6.30.5-43) kernel. F-11 qemu-kvm was missing a crucial piece of GSO support which caused networking to break with 2.6.30 guests. This was only a problem for people using qemu-kvm directly from the command line because libvirt wasn't enabling GSO (#526472). Fixed now in updates-testing. https://bugzilla.redhat.com/509532 Move /usr/bin/qemu-kvm into the qemu-kvm package danpb points out that the qemu-kvm package should go away eventually, so we should keep it as an empty meta-package for comps. https://bugzilla.redhat.com/523677 add support for s390x Dan Horák proposed that Ulrich Hecht's patch to add support for s390 to qemu be included in Fedora, but it was decided to just wait for the patch to get upstream. == libvirt == https://bugzilla.redhat.com/524499 libvirt should not enable qemu's audio backend, even with selinux disabled Now that we run qemu as an unprivileged user, we should never enable qemu's sdl/pulse audio backend. A patch to do that from upstream is now in F-12. https://bugzilla.redhat.com/497131 svirt fails to relabel qcow2 backing files This has been fixed by using libvirt's existing image format probing code to determine the backing file and then re-labelling it. Patch has been backported to F-12 now. https://bugzilla.redhat.com/526472 libvirt fails to enable IFF_VNET_HDR on tap fds for qemu-kvm In F-11 libvirt was failing to recognise that qemu had GSO support; fixed by backporting patches to re-work how libvirt probes qemu versions. https://bugzilla.redhat.com/523766 AVCs from libvirtd startup A bunch of SELinux AVCs during libvirtd startup that look like they might be fixed by latest upstream netcf. Fixed by Dan Walsh in latest rawhide. https://bugzilla.redhat.com/517617 libvirt/netcf loads modprobe.conf and others - AVC messages (preventing libvirtd (virtd_t) "getattr" modules_conf_t) More netcf related AVCs which have been fixed. https://bugzilla.redhat.com/520864 libvirt is using untrusted 'info vcpus' PID data for already running VM after libvirtd restart https://bugzilla.redhat.com/465532 RFE: libvirt should support KVM huge page backed memory https://bugzilla.redhat.com/517619 libvirtd should chown dirs when qemu configured to run as root/root All fixed in rawhide by libvirt-0.7.1. == python-virtinst == https://bugzilla.redhat.com/523960 virtinst saves images where qemu can't access them by default Cole has fixed this by making virtinst added qemu to the ACLs for the directories qemu will need access to. https://bugzilla.redhat.com/524109 virt-manager: Fails to install guest using ISO file - internal error unable to start guest: qemu: 'iso' invalid format The fix for bug #517151 introduces another problem; Cole has now fixed that one in rawhide. https://bugzilla.redhat.com/499654 failure to add more than 16 virtio-blk devices in virt-manager https://bugzilla.redhat.com/505317 virtinst: make SLES11 guests use virtio by default https://bugzilla.redhat.com/506319 virtinst errors finding default bridge: upsets virt-manager Various F11 virtinst bugs fixed by python-virtinst-0.400.3-9.fc11. == virt-manager == https://bugzilla.redhat.com/517379 virt-manager should warn if guest images will are not readable by qemu When attaching any storage to a guest we now attempt to verify that the 'qemu' user has search access. If not, we warn the user and offer to fix, using ACLs. The user can opt out, and optionally 'Never ask about this path again" if we have any false positives. https://bugzilla.redhat.com/517664 virt-manager ignores "Host does not support any virtualization options" error Cole has made this error condition a bit more obvious to the user. https://bugzilla.redhat.com/522823 virt-manager doc screenshots are outdated The help docs are so woefully out of date, Cole has just disabled them for now. https://bugzilla.redhat.com/502777 virt-manager does not recalculate free disk space on new VM creation While the 'New VM' dialog is up, virt-manager now polls every 3 seconds to check the available disk space on the host.

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Re: [fedora-virt] virt-preview updates

by Gianluca Cecchi

On Thu, 01 Oct 2009 21:59:01 +0100 Mark McLoughlin wrote: > == virt-manager == > > * Tue Sep 29 2009 Cole Robinson <crobinso redhat com> - 0.8.0-6.fc12 > - Fix VCPU hotplug Hello, any info on about what would have been fixed? And also provided functionality itself.... In my env with 0.8.0-6 and f11 with virt-preview it seems I cannot hotplug/unplug at all a cpu.... In details window of a rh 5.3 vm with 2 vCPUs, I cannot raise the number (current is equal to maximum), while I can lower but I get that the effect will be visible at next reboot..... Or do I have to create a new VM with this peculiar version of virt-manager to see different behaviour? Gianluca

14 years, 6 months

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merging lists?

by Jon Stanley

I'm working on migrating Fedora lists from RHT infrastructure to Fedora infrastructure in the coming little bit. The question that I had was does fedora-xen and fedora-virt both need to exist? I'm subscribed to both, and certainly the conversations on each are different, but could they be merged? As of several months ago, the subscriber count of fedora-xen was WAY higher than that of fedora-virt, this doesn't seem to make much sense since Xen is not The Way Forward(TM), at least from what I can see. I guess the question is could we merge the two lists, and have one less to migrate, or are both really needed?

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using kqemu with fedora-virt-preview repo

by Gianluca Cecchi

I have a powerful server but without VT capabilities, where I would like to use virt-manager tools as of fedora-virt-preview repo and speed up somehow things using kqemu. It seems that kqemu support is not compiled in for this repo, correct? Instead, as the kqemu kernel module is in rpmfusion, I presume that the stock f11 qemu has this support built in.... Am I wrong? Any problems to compile kqemu support ? On another server, tried to rebuild qemu-0.11.0-2.fc11.src.rpm (from fedora-virt) after installing kqemu from rpmfusion. But while if I take the source I get kqemu as enabled in configure script, in rpmbuild I don't get so. I notice that inside the qemu tar.gz as provided by the source.rpm there are three lines below in the top configure script: if [ "$cpu" = "i386" -o "$cpu" = "x86_64" ] ; then kqemu="yes" audio_possible_drivers="$audio_possible_drivers fmod" kvm="yes" kqemu="no" So I commented out the kqemu="no" line... and built the package (not touching the other two configure scripts that seems related to kvm...) After installing, if I run qem-kvm or qemu without kqemu all is ok. Instead, running [root@tekkaman bin]# ./qemu --enable-kqemu I get Not enough memory (requested_size = 16777216, max memory = 146800640) Aborted Any hints? For Kqemu now gplv2, are there any barriers to have it included in fedora directly? Thanks in advance, Gianluca

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virt October 2009