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11:57 p.m.
New subject: [Users] [Bug 881579] kernel-3.6.7-4 causes panic on FreeBSD KVM guest with >1 CPU
On 12/19/2012 10:38 AM, Karli Sjöberg wrote:
ons 2012-12-19 klockan 01:28 +0000 skrev bugzilla(a)redhat.com:
> Product: Fedora
> https://bugzilla.redhat.com/show_bug.cgi?id=881579
>
> --- Comment #3 from Marcelo Tosatti <mtosatti(a)redhat.com
<mailto:mtosatti@redhat.com>> ---
> Its very likely the cause for this are instruction emulation upstream
> (emulation of invalid guest state by default).
>
> These are being fixed upstream. Once that is completed, it will be necessary to
> backport
> to FC17.
>
> In the meantime, loading kvm-intel.ko with emulate_invalid_guest_state=0 should
> work around the problem (tested locally on kvm.git as of dec/2012).
>
For future reference, I want to add what measures have been taken:
From oVirt Webadmin, the Host was set into Maintenance.
Then this file:
*/etc/sysconfig/modules/kvm.modules*:
#!/bin/sh
grep vmx /proc/cpuinfo >/dev/null 2>&1 && vmx=1
grep svm /proc/cpuinfo >/dev/null 2>&1 && svm=1
if [ "$vmx" ] || [ "$svm" ]; then
[ "$vmx" ] && modprobe -b >/dev/null 2>&1
[ "$svm" ] && modprobe -b kvm-amd >/dev/null 2>&1
# no reason why vhost should not work with TCG, but currently it does not
modprobe -b vhost-net >/dev/null 2>&1
else
exit 0
fi
Was modfied to look like:
#!/bin/sh
grep vmx /proc/cpuinfo >/dev/null 2>&1 && vmx=1
grep svm /proc/cpuinfo >/dev/null 2>&1 && svm=1
if [ "$vmx" ] || [ "$svm" ]; then
[ "$vmx" ] && modprobe -b kvm-intel *emulate_invalid_guest_state=0*
>/dev/null 2>&1
[ "$svm" ] && modprobe -b kvm-amd >/dev/null 2>&1
# no reason why vhost should not work with TCG, but currently it does not
modprobe -b vhost-net >/dev/null 2>&1
else
exit 0
fi
And after *two* reboots(didn´t get set after the first reboot, strangly
enough) the setting have been confirmed persistant with:
# more /sys/module/kvm_intel/parameters/emulate_invalid_guest_state
N
The Host was again activated and the guest panics are gone.
Thanks for the hint!
/Karli
_______________________________________________
Users mailing list
Users(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/users
so freebsd doesn't work with vhost?
question - wouldn't this work instead of the above:
edit vm --> custom properties --> vhost --> eth0:false
(hopefully i remember this correctly).
Thanks,
Itamar
12:24 a.m.
New subject: [Users] [Bug 881579] kernel-3.6.7-4 causes panic on FreeBSD KVM guest with >1 CPU
On Thu, Dec 20, 2012 at 11:57:20PM +0200, Itamar Heim wrote:
On 12/19/2012 10:38 AM, Karli Sjöberg wrote:
>ons 2012-12-19 klockan 01:28 +0000 skrev bugzilla(a)redhat.com:
>>Product: Fedora
>>https://bugzilla.redhat.com/show_bug.cgi?id=881579
>>
>>--- Comment #3 from Marcelo Tosatti <mtosatti(a)redhat.com
<mailto:mtosatti@redhat.com>> ---
>>Its very likely the cause for this are instruction emulation upstream
>>(emulation of invalid guest state by default).
>>
>>These are being fixed upstream. Once that is completed, it will be necessary to
>>backport
>>to FC17.
>>
>>In the meantime, loading kvm-intel.ko with emulate_invalid_guest_state=0 should
>>work around the problem (tested locally on kvm.git as of dec/2012).
>>
>
>For future reference, I want to add what measures have been taken:
>
> From oVirt Webadmin, the Host was set into Maintenance.
>
>Then this file:
>*/etc/sysconfig/modules/kvm.modules*:
>#!/bin/sh
>
>grep vmx /proc/cpuinfo >/dev/null 2>&1 && vmx=1
>grep svm /proc/cpuinfo >/dev/null 2>&1 && svm=1
>
>if [ "$vmx" ] || [ "$svm" ]; then
> [ "$vmx" ] && modprobe -b >/dev/null 2>&1
> [ "$svm" ] && modprobe -b kvm-amd >/dev/null 2>&1
>
> # no reason why vhost should not work with TCG, but currently it does not
> modprobe -b vhost-net >/dev/null 2>&1
>else
> exit 0
>fi
>
>Was modfied to look like:
>#!/bin/sh
>
>grep vmx /proc/cpuinfo >/dev/null 2>&1 && vmx=1
>grep svm /proc/cpuinfo >/dev/null 2>&1 && svm=1
>
>if [ "$vmx" ] || [ "$svm" ]; then
> [ "$vmx" ] && modprobe -b kvm-intel
*emulate_invalid_guest_state=0*
> >/dev/null 2>&1
> [ "$svm" ] && modprobe -b kvm-amd >/dev/null 2>&1
>
> # no reason why vhost should not work with TCG, but currently it does not
> modprobe -b vhost-net >/dev/null 2>&1
>else
> exit 0
>fi
>
>And after *two* reboots(didn´t get set after the first reboot, strangly
>enough) the setting have been confirmed persistant with:
># more /sys/module/kvm_intel/parameters/emulate_invalid_guest_state
>N
>
>The Host was again activated and the guest panics are gone.
>
>Thanks for the hint!
>
>/Karli
>
>
>
>_______________________________________________
>Users mailing list
>Users(a)ovirt.org
>http://lists.ovirt.org/mailman/listinfo/users
>
so freebsd doesn't work with vhost?
question - wouldn't this work instead of the above:
edit vm --> custom properties --> vhost --> eth0:false
(hopefully i remember this correctly).
almost... it is (unfortunately, and ambiguously)
--> <vm_network_name>:false
-----
it's ambiguous because it assumes that only one nic is connected to a
specific network. It's not the end of the world (connecting a machine
with to nics to the same lan is /rare/), but it's another opportunity to
solicit per-nic custom properties,
http://lists.ovirt.org/pipermail/users/2012-December/005266.html
4356
days inactive
4357
days old
2 comments
3 participants
participants (3)
-
Dan Kenigsberg -
Itamar Heim -
Karli Sjöberg