Then you should definitely submit a bug with redhat about this, seems like a serious one.
-- Sent from the Delta quadrant using Borg technology!
Nux! www.nux.ro
----- Original Message -----
From: "Gena Makhomed" gmm@csdoc.com To: centos-virt@centos.org Sent: Wednesday, 29 July, 2015 23:09:14 Subject: [CentOS-virt] CentOS 7.1 + qemu-kvm-ev + SLIC acpitable windows bug workaround
On 29.07.2015 21:34, Nux! wrote:
Yes, you can. In fact you can use the binaries from the ovirt repo itself, no need to rebuild.
Thank you!
In fact - I can't use raw binaries from the ovirt repo itself, because these qemu-kvm binaries contains one bug, which is already fixed in Debian:
If you want to migrate Windows from hardware node to VM using CentOS 7.1 on hardware node and libvirt xml config:
<domain type='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'> ..... <qemu:commandline> <qemu:arg value='-acpitable'/> <qemu:arg value='file=/sys/firmware/acpi/tables/SLIC'/> </qemu:commandline> </domain>
Winodws not working correctly in this case, because Windows requires, what oem_id and oem_table_id from SLIC must be also placed into oem_id and oem_table_id of RSDT.
Debian version of qemu-kvm contains workaround for this windows bug, and using Debian - Windows VM will works fine. But CentOS packages does not contain such workaround, so qemu-kvm-ev now must be patched manually with each new release.
Patch already was created by Michael Tokarev in 2014: this is file mjt-set-oem-in-rsdt-like-slic.diff from https://packages.debian.org/jessie/qemu-kvm
This patch cleanly applies also to qemu-kvm-ev-2.1.2-23.el7_1.3.1
See mjt-set-oem-in-rsdt-like-slic.diff and qemu-kvm.spec.patch in attach for details.
After executing rpmbuild -ba qemu-kvm.spec you can place new qemu-kvm binaries into /srv/download/centos/7/privat/x86_64/Packages create local repo and use it for upgrading rpm packages, for example, see privat.repo and privat-createrepo-7-x86_64 in attach.
==============================================================
Better if this workaround of Windows bug will be included into RHEL/CentOS ovirt repo binaries, and this will allow to anybody easy migrate Windows from hardware nodes to VMs and easy run CentOS/RHEL at hardware nodes.
P.S. After patching qemu-kvm - option acpitable works without any bugs:
# man qemu-kvm
-acpitable [sig=str][...] If a SLIC table is supplied to qemu, then the oem_id from the SLIC table will be copied into the RSDT table (this is a Debian addition).----- Original Message -----
Is it possible to use binary packages build from http://resources.ovirt.org/pub/ovirt-3.5/rpm/el7/SRPMS/qemu-kvm-ev-2.1.2-23.... with plain CentOS 7.1 and use all other packages from CentOS (libvirt, virt-manager, etc)
Is it have reasons, if I not use live migrations and qcow2 snapshots? (instead use zfs, zvols and zfs snapshots for VM disks online backups)
Is using qemu-kvm-ev with CentOS 7.1 have any disadvantages?
-- Best regards, Gena
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