a (bad) kvm story from a plain user

a (bad) kvm story from a plain user

[Slohm Gadaburi]

Hello list.

I want to share my first kvm experience with you and ask for
your advice.

I run up-to-date Ubuntu 7.04 (kernel 2.6.20) on AMD processor.

I did apt-get installed kvm (which gave me the kvm-amd.ko module),
and qemu packages.

I modprobed kvm-adm.ko with no hassle.

and then I followed the HOWTO page on the kvm wiki -
created an qemu image and booted off a cd for installing RH9.0
(yeah, antique).

But the installation was sooooo slow. about 3 hours !

How can I know if the qemu I ran took advantage of the kvm module ?

I ran /usr/bin/qemu as I didn't have /usr/local/kvm/bin/qemu like the HOWTO
mentioned (as I didn't compiled the kvm bundle myself...).

So maybe the qemu I ran was just plain qemu, without the kvm changes ?

if so, then how could I have the kvm-changed qemu binaires ?

I even tried to compile the kvm bundle myself (i took the one that
is recommended for kernel 2.6.20, as the wiki says),
but alas, the ./configure shouted I don't have gcc 3.x
(which is indeed true as an up-to-date system today have gcc 4.x).

so was there another way to compile the kvm bundle ?

last question - the ./configure script has the option reflecting whether the
kernel is patched or not. if i download the cutting edge rc3 kernel,
should i add the --patched flag or not ?

thank you
hope u could help me
slohm

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Re: a (bad) kvm story from a plain user

[Glauber de Oliveira Costa]

> How can I know if the qemu I ran took advantage of the kvm module ?
By the time you reported, probably did not.

> I even tried to compile the kvm bundle myself (i took the one that
> is recommended for kernel 2.6.20, as the wiki says),
> but alas, the ./configure shouted I don't have gcc 3.x
> (which is indeed true as an up-to-date system today have gcc 4.x).
It should be included in any up-to-date system as an alternative.
Probably gcc-compat, or something like this.

> last question - the ./configure script has the option reflecting whether the
> kernel is patched or not. if i download the cutting edge rc3 kernel,
> should i add the --patched flag or not ?
>

Yes ;-)

-- 
Glauber de Oliveira Costa.
"Free as in Freedom"
http://glommer.net

"The less confident you are, the more serious you have to act."

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Re: a (bad) kvm story from a plain user

[Koen de Jonge]

Glauber de Oliveira Costa wrote:
>> I even tried to compile the kvm bundle myself (i took the one that
>> is recommended for kernel 2.6.20, as the wiki says),
>> but alas, the ./configure shouted I don't have gcc 3.x
>> (which is indeed true as an up-to-date system today have gcc 4.x).
>>     
> It should be included in any up-to-date system as an alternative.
> Probably gcc-compat, or something like this.
>   
I'm also trying exactly that:
- use ubuntu 7.04 desktop edition
- use ubuntu (updated) kernel (Linux kruimelvlaai 2.6.20-16-generic #2 
SMP Thu Jun 7 20:19:32 UTC 2007 i686 GNU/Linux)

Im using an AMD Athlon 64 X2 4800+ processor

These where the packages I installed to get me started (added the sudo 
part for possibly easy copy pasting):

sudo apt-get install libasound2-dev
sudo apt-get install libsdl-gfx1.2-dev
sudo apt-get install gcc-3.4
sudo apt-get install zlibc
sudo apt-get install lib64z1-dev
sudo apt-get install uuid-dev

Which got me a compiled kvm-34 and an installed one.

But starting it gave me:
koen@kruimelvlaai:~$ sudo /usr/local/kvm/bin/qemu-system-x86_64 -hda 
images/ubuntu704-server.img -boot c -m 512
Password:
kvm kernel version too old: KVM_GET_API_VERSION ioctl not supported
Could not initialize KVM, will disable KVM support

Then I checked if it would be easy/possible to keep using ubuntu and 
install a self-compiled kernel (processing power to spend, so why not).
But that proved to be not such a good idea, since 'recompile kernel - 
nividia dont work - Ubuntu Forums' 
http://ubuntuforums.org/showthread.php?t=524411

So while downloading the daily snapshot of gutsy 
(http://cdimage.ubuntu.com/daily-live/current/) I tried version kvm-17.

If you hit 'sudo apt-get install kvm' you'll get kvm-16 :
~$ zcat /usr/share/doc/kvm/changelog.Debian.gz | head
kvm (1:16-1ubuntu2) feisty; urgency=low

* Revert to kvm-16 to match released kernel.
* Add epoch.

This page does not tell you what version will work with the ubuntu 
supported kernel (of course) http://kvm.qumranet.com/kvmwiki/Downloads

Can anyone tell me:
- what is the linux host OS flavour and version the developers use?
- what is the latest kvm-version that 'just works' on a ubuntu 7.04 
desktop release?

>> last question - the ./configure script has the option reflecting whether the
>> kernel is patched or not. if i download the cutting edge rc3 kernel,
>> should i add the --patched flag or not ?
>>     
I found out that using the --with-patched-kernel I did not get it 
compiled at all.



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Re: a (bad) kvm story from a plain user

[Izik Eidus]

this seems like you didnt load your new modules
try to do:
rmmod kvm_amd
rmmod kvm

and then load the moudles in your compiling dir:
like:
cd kvm-34/kernel
insmod kvm.ko
insmod kvm-amd.ko

and then try

On Tue, 2007-08-14 at 23:20 +0200, Koen de Jonge wrote:
> Glauber de Oliveira Costa wrote:
> >> I even tried to compile the kvm bundle myself (i took the one that
> >> is recommended for kernel 2.6.20, as the wiki says),
> >> but alas, the ./configure shouted I don't have gcc 3.x
> >> (which is indeed true as an up-to-date system today have gcc 4.x).
> >>     
> > It should be included in any up-to-date system as an alternative.
> > Probably gcc-compat, or something like this.
> >   
> I'm also trying exactly that:
> - use ubuntu 7.04 desktop edition
> - use ubuntu (updated) kernel (Linux kruimelvlaai 2.6.20-16-generic #2 
> SMP Thu Jun 7 20:19:32 UTC 2007 i686 GNU/Linux)
> 
> Im using an AMD Athlon 64 X2 4800+ processor
> 
> These where the packages I installed to get me started (added the sudo 
> part for possibly easy copy pasting):
> 
> sudo apt-get install libasound2-dev
> sudo apt-get install libsdl-gfx1.2-dev
> sudo apt-get install gcc-3.4
> sudo apt-get install zlibc
> sudo apt-get install lib64z1-dev
> sudo apt-get install uuid-dev
> 
> Which got me a compiled kvm-34 and an installed one.
> 
> But starting it gave me:
> koen@kruimelvlaai:~$ sudo /usr/local/kvm/bin/qemu-system-x86_64 -hda 
> images/ubuntu704-server.img -boot c -m 512
> Password:
> kvm kernel version too old: KVM_GET_API_VERSION ioctl not supported
> Could not initialize KVM, will disable KVM support
> 
> Then I checked if it would be easy/possible to keep using ubuntu and 
> install a self-compiled kernel (processing power to spend, so why not).
> But that proved to be not such a good idea, since 'recompile kernel - 
> nividia dont work - Ubuntu Forums' 
> http://ubuntuforums.org/showthread.php?t=524411
> 
> So while downloading the daily snapshot of gutsy 
> (http://cdimage.ubuntu.com/daily-live/current/) I tried version kvm-17.
> 
> If you hit 'sudo apt-get install kvm' you'll get kvm-16 :
> ~$ zcat /usr/share/doc/kvm/changelog.Debian.gz | head
> kvm (1:16-1ubuntu2) feisty; urgency=low
> 
> * Revert to kvm-16 to match released kernel.
> * Add epoch.
> 
> This page does not tell you what version will work with the ubuntu 
> supported kernel (of course) http://kvm.qumranet.com/kvmwiki/Downloads
> 
> Can anyone tell me:
> - what is the linux host OS flavour and version the developers use?
> - what is the latest kvm-version that 'just works' on a ubuntu 7.04 
> desktop release?
> 
> >> last question - the ./configure script has the option reflecting whether the
> >> kernel is patched or not. if i download the cutting edge rc3 kernel,
> >> should i add the --patched flag or not ?
> >>     
> I found out that using the --with-patched-kernel I did not get it 
> compiled at all.
> 
> 
> 
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Re: a (bad) kvm story from a plain user

[Koen de Jonge]

Izik Eidus wrote:
> this seems like you didnt load your new modules
> try to do:
> rmmod kvm_amd
> rmmod kvm
>
> and then load the moudles in your compiling dir:
> like:
> cd kvm-34/kernel
> insmod kvm.ko
> insmod kvm-amd.ko
>
> and then try
>   
That did help (a lot), now it is running on ubuntu 7.04 desktop with 
kvm-34 on kernel 2.6.20-16-generic. :) And what is more important, it 
feels a lot faster than the 'apt-get install' version.

I'll reinstall my entire desktop again some time this week and write up 
a tutorial on how to get KVM running with the latest version on your 
ubuntu 7.04 desktop installation (starting with the ubuntu cd).

Thanks,
Koen

> On Tue, 2007-08-14 at 23:20 +0200, Koen de Jonge wrote:
>   
>> Glauber de Oliveira Costa wrote:
>>     
>>>> I even tried to compile the kvm bundle myself (i took the one that
>>>> is recommended for kernel 2.6.20, as the wiki says),
>>>> but alas, the ./configure shouted I don't have gcc 3.x
>>>> (which is indeed true as an up-to-date system today have gcc 4.x).
>>>>     
>>>>         
>>> It should be included in any up-to-date system as an alternative.
>>> Probably gcc-compat, or something like this.
>>>   
>>>       
>> I'm also trying exactly that:
>> - use ubuntu 7.04 desktop edition
>> - use ubuntu (updated) kernel (Linux kruimelvlaai 2.6.20-16-generic #2 
>> SMP Thu Jun 7 20:19:32 UTC 2007 i686 GNU/Linux)
>>
>> Im using an AMD Athlon 64 X2 4800+ processor
>>
>> These where the packages I installed to get me started (added the sudo 
>> part for possibly easy copy pasting):
>>
>> sudo apt-get install libasound2-dev
>> sudo apt-get install libsdl-gfx1.2-dev
>> sudo apt-get install gcc-3.4
>> sudo apt-get install zlibc
>> sudo apt-get install lib64z1-dev
>> sudo apt-get install uuid-dev
>>
>> Which got me a compiled kvm-34 and an installed one.
>>
>> But starting it gave me:
>> koen@kruimelvlaai:~$ sudo /usr/local/kvm/bin/qemu-system-x86_64 -hda 
>> images/ubuntu704-server.img -boot c -m 512
>> Password:
>> kvm kernel version too old: KVM_GET_API_VERSION ioctl not supported
>> Could not initialize KVM, will disable KVM support
>>
>> Then I checked if it would be easy/possible to keep using ubuntu and 
>> install a self-compiled kernel (processing power to spend, so why not).
>> But that proved to be not such a good idea, since 'recompile kernel - 
>> nividia dont work - Ubuntu Forums' 
>> http://ubuntuforums.org/showthread.php?t=524411
>>
>> So while downloading the daily snapshot of gutsy 
>> (http://cdimage.ubuntu.com/daily-live/current/) I tried version kvm-17.
>>
>> If you hit 'sudo apt-get install kvm' you'll get kvm-16 :
>> ~$ zcat /usr/share/doc/kvm/changelog.Debian.gz | head
>> kvm (1:16-1ubuntu2) feisty; urgency=low
>>
>> * Revert to kvm-16 to match released kernel.
>> * Add epoch.
>>
>> This page does not tell you what version will work with the ubuntu 
>> supported kernel (of course) http://kvm.qumranet.com/kvmwiki/Downloads
>>
>> Can anyone tell me:
>> - what is the linux host OS flavour and version the developers use?
>> - what is the latest kvm-version that 'just works' on a ubuntu 7.04 
>> desktop release?
>>
>>     
>>>> last question - the ./configure script has the option reflecting whether the
>>>> kernel is patched or not. if i download the cutting edge rc3 kernel,
>>>> should i add the --patched flag or not ?
>>>>     
>>>>         
>> I found out that using the --with-patched-kernel I did not get it 
>> compiled at all.
>>
>>
>>
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>>     
>
>   


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Re: a (bad) kvm story from a plain user

[Koen de Jonge]

Izik Eidus wrote:

<a reminder on how to remove and insert kernel modules>
> On Tue, 2007-08-14 at 23:20 +0200, Koen de Jonge wrote:
>   
>> Can anyone tell me:
>> - what is the linux host OS flavour and version the developers use?
>> - what is the latest kvm-version that 'just works' on a ubuntu 7.04 
>> desktop release?
>>     
I still like to know the answer to those questions though, that might 
also help in providing debug info once I get in a bit deeper.

Koen

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Re: a (bad) kvm story from a plain user

[Avi Kivity]

Koen de Jonge wrote:
> Izik Eidus wrote:
>
> <a reminder on how to remove and insert kernel modules>
>   
>> On Tue, 2007-08-14 at 23:20 +0200, Koen de Jonge wrote:
>>   
>>     
>>> Can anyone tell me:
>>> - what is the linux host OS flavour and version the developers use?
>>> - what is the latest kvm-version that 'just works' on a ubuntu 7.04 
>>> desktop release?
>>>     
>>>       
> I still like to know the answer to those questions though, that might 
> also help in providing debug info once I get in a bit deeper.
>   

Different developers use different distros.  On my servers I use FC6
x86-64, with the kernel from kvm.git (all kvm changes, closely tracking
mainline Linux); on my home machine I use F7 i386 with a similar kernel.

-- 
Do not meddle in the internals of kernels, for they are subtle and quick to panic.


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Re: a (bad) kvm story from a plain user

[Anthony Liguori]

On Tue, 2007-08-14 at 23:48 +0200, Koen de Jonge wrote:
> Izik Eidus wrote:
> 
> <a reminder on how to remove and insert kernel modules>
> > On Tue, 2007-08-14 at 23:20 +0200, Koen de Jonge wrote:
> >   
> >> Can anyone tell me:
> >> - what is the linux host OS flavour and version the developers use?
> >> - what is the latest kvm-version that 'just works' on a ubuntu 7.04 
> >> desktop release?

I have a mix of Feisty and Gutsy hosts.  I think it's as well supported
as anything else for all KVM releases.

A few simple tips:

1) apt-get build-dep kvm will get you everything you need except gcc-3.4

2) the kvm that comes in Feisty is pretty old.  Gutsy currently has
kvm-28 which is relatively recent.  Most importantly, it has a new
enough version such that the ABI between kernel space and user space is
stable.

Ubuntu users won't face these incompatibility issues once Gutsy is
released.

Regards,

Anthony Liguori

> >>     
> I still like to know the answer to those questions though, that might 
> also help in providing debug info once I get in a bit deeper.
> 
> Koen
> 
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Re: a (bad) kvm story from a plain user

[Luca]

On 8/14/07, Slohm Gadaburi <slohmg-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> I did apt-get installed kvm (which gave me the kvm-amd.ko module),
> and qemu packages.
>
> I modprobed kvm-adm.ko with no hassle.
>
> and then I followed the HOWTO page on the kvm wiki -
> created an qemu image and booted off a cd for installing RH9.0
> (yeah, antique).
>
> But the installation was sooooo slow. about 3 hours !
>
> How can I know if the qemu I ran took advantage of the kvm module ?

If it cannot use hw virtualization it tells you:

Could not initialize KVM, will disable KVM support

> I ran /usr/bin/qemu as I didn't have /usr/local/kvm/bin/qemu like the HOWTO
> mentioned (as I didn't compiled the kvm bundle myself...).

Under debian the executable is called kvm; I believe that it's the
same under ubuntu. Run dpkg -L kvm and see what has been installed.

Luca

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Re: a (bad) kvm story from a plain user

[Izik Eidus]

one easy way to check if the qemu binary you ran had kvm support at all
is:
run /usr/bin/qemu --help | grep kvm
if you see there something like:  -no-kvm disable KVM hardware...
this is patched qemu with support to kvm.

after this run:
lsmod | grep kvm
and check if the kvm driver is loaded
if it is not do:
modprobe kvm-amd
if this fail please write the message it give you to this list.

after this try to run qemu again, and check if it say something like:
Could not initialize KVM, will disable KVM support

in that case if the module was loaded you probably dont have permission
to use it
easy way would be trying as root, or adding yourself to the group.

hope i helped you

On Tue, 2007-08-14 at 22:22 +0300, Slohm Gadaburi wrote:
> Hello list.
> 
> I want to share my first kvm experience with you and ask for
> your advice.
> 
> I run up-to-date Ubuntu 7.04 (kernel 2.6.20) on AMD processor.
> 
> I did apt-get installed kvm (which gave me the kvm-amd.ko module),
> and qemu packages.
> 
> I modprobed kvm-adm.ko with no hassle.
> 
> and then I followed the HOWTO page on the kvm wiki -
> created an qemu image and booted off a cd for installing RH9.0
> (yeah, antique).
> 
> But the installation was sooooo slow. about 3 hours !
> 
> How can I know if the qemu I ran took advantage of the kvm module ?
> 
> I ran /usr/bin/qemu as I didn't have /usr/local/kvm/bin/qemu like the HOWTO
> mentioned (as I didn't compiled the kvm bundle myself...).
> 
> So maybe the qemu I ran was just plain qemu, without the kvm changes ?
> 
> if so, then how could I have the kvm-changed qemu binaires ?
> 
> I even tried to compile the kvm bundle myself (i took the one that
> is recommended for kernel 2.6.20, as the wiki says),
> but alas, the ./configure shouted I don't have gcc 3.x
> (which is indeed true as an up-to-date system today have gcc 4.x).
> 
> so was there another way to compile the kvm bundle ?
> 
> last question - the ./configure script has the option reflecting whether the
> kernel is patched or not. if i download the cutting edge rc3 kernel,
> should i add the --patched flag or not ?
> 
> thank you
> hope u could help me
> slohm
> 
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Re: a (bad) kvm story from a plain user

[Avi Kivity]

Slohm Gadaburi wrote:
> How can I know if the qemu I ran took advantage of the kvm module ?
>   

No one mentioned my favorite: when kvm is in control, the title bar of
the guest console window changes to "QEMU/KVM".

> I ran /usr/bin/qemu as I didn't have /usr/local/kvm/bin/qemu like the HOWTO
> mentioned (as I didn't compiled the kvm bundle myself...).
>   

Well, the HOWTO assumes you did all the previous steps.  We should have
a HOWTO/Ubuntu for distro users (but really, Ubuntu should have a gui
for this).


-- 
Do not meddle in the internals of kernels, for they are subtle and quick to panic.


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Re: a (bad) kvm story from a plain user

[Anthony Liguori]

On Wed, 2007-08-15 at 05:44 +0300, Avi Kivity wrote:
> Slohm Gadaburi wrote:
> > How can I know if the qemu I ran took advantage of the kvm module ?
> >   
> 
> No one mentioned my favorite: when kvm is in control, the title bar of
> the guest console window changes to "QEMU/KVM".
> 
> > I ran /usr/bin/qemu as I didn't have /usr/local/kvm/bin/qemu like the HOWTO
> > mentioned (as I didn't compiled the kvm bundle myself...).
> >   
> 
> Well, the HOWTO assumes you did all the previous steps.  We should have
> a HOWTO/Ubuntu for distro users (but really, Ubuntu should have a gui
> for this).

virt-manager isn't currently packaged for Ubuntu (even in Gutsy).  If
there any Ubuntu devs out there, please consider packaging it!

Regards,

Anthony Liguori

> 


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Re: a (bad) kvm story from a plain user

[Daniel P. Berrange]

On Tue, Aug 14, 2007 at 10:26:24PM -0500, Anthony Liguori wrote:
> 
> On Wed, 2007-08-15 at 05:44 +0300, Avi Kivity wrote:
> > Slohm Gadaburi wrote:
> > > How can I know if the qemu I ran took advantage of the kvm module ?
> > >   
> > 
> > No one mentioned my favorite: when kvm is in control, the title bar of
> > the guest console window changes to "QEMU/KVM".
> > 
> > > I ran /usr/bin/qemu as I didn't have /usr/local/kvm/bin/qemu like the HOWTO
> > > mentioned (as I didn't compiled the kvm bundle myself...).
> > >   
> > 
> > Well, the HOWTO assumes you did all the previous steps.  We should have
> > a HOWTO/Ubuntu for distro users (but really, Ubuntu should have a gui
> > for this).
> 
> virt-manager isn't currently packaged for Ubuntu (even in Gutsy).  If
> there any Ubuntu devs out there, please consider packaging it!

There are virt-manager packages for Debian so it shouldn't be hard to port 
them.

Regards,
Dan.
-- 
|=- Red Hat, Engineering, Emerging Technologies, Boston.  +1 978 392 2496 -=|
|=-           Perl modules: http://search.cpan.org/~danberr/              -=|
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Re: a (bad) kvm story from a plain user

[Jorge Lucángeli Obes]

On 8/15/07, Daniel P. Berrange <berrange-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> wrote:
> On Tue, Aug 14, 2007 at 10:26:24PM -0500, Anthony Liguori wrote:
> >
> > On Wed, 2007-08-15 at 05:44 +0300, Avi Kivity wrote:
> > > Slohm Gadaburi wrote:
> > > > How can I know if the qemu I ran took advantage of the kvm module ?
> > > >
> > >
> > > No one mentioned my favorite: when kvm is in control, the title bar of
> > > the guest console window changes to "QEMU/KVM".
> > >
> > > > I ran /usr/bin/qemu as I didn't have /usr/local/kvm/bin/qemu like the HOWTO
> > > > mentioned (as I didn't compiled the kvm bundle myself...).
> > > >
> > >
> > > Well, the HOWTO assumes you did all the previous steps.  We should have
> > > a HOWTO/Ubuntu for distro users (but really, Ubuntu should have a gui
> > > for this).
> >
> > virt-manager isn't currently packaged for Ubuntu (even in Gutsy).  If
> > there any Ubuntu devs out there, please consider packaging it!
>
> There are virt-manager packages for Debian so it shouldn't be hard to port
> them.

Just today I was trying virt-manager and libvirt. I got this error
when creating a VM:

Unable to complete install: 'virDomainCreateLinux() failed Cannot find
QEMU binary /usr/bin/qemu: No such file or directory'

I guess libvirt is confused by qemu-system-x86_64. ¿Any ideas? I'll
try to prepare a patch.

Cheers,
Jorge

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Re: a (bad) kvm story from a plain user

[Daniel P. Berrange]

On Wed, Aug 15, 2007 at 01:43:58AM -0300, Jorge Luc?ngeli Obes wrote:
> On 8/15/07, Daniel P. Berrange <berrange-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> wrote:
> > On Tue, Aug 14, 2007 at 10:26:24PM -0500, Anthony Liguori wrote:
> > >
> > > On Wed, 2007-08-15 at 05:44 +0300, Avi Kivity wrote:
> > > > Slohm Gadaburi wrote:
> > > > > How can I know if the qemu I ran took advantage of the kvm module ?
> > > > >
> > > >
> > > > No one mentioned my favorite: when kvm is in control, the title bar of
> > > > the guest console window changes to "QEMU/KVM".
> > > >
> > > > > I ran /usr/bin/qemu as I didn't have /usr/local/kvm/bin/qemu like the HOWTO
> > > > > mentioned (as I didn't compiled the kvm bundle myself...).
> > > > >
> > > >
> > > > Well, the HOWTO assumes you did all the previous steps.  We should have
> > > > a HOWTO/Ubuntu for distro users (but really, Ubuntu should have a gui
> > > > for this).
> > >
> > > virt-manager isn't currently packaged for Ubuntu (even in Gutsy).  If
> > > there any Ubuntu devs out there, please consider packaging it!
> >
> > There are virt-manager packages for Debian so it shouldn't be hard to port
> > them.
> 
> Just today I was trying virt-manager and libvirt. I got this error
> when creating a VM:
> 
> Unable to complete install: 'virDomainCreateLinux() failed Cannot find
> QEMU binary /usr/bin/qemu: No such file or directory'

The KVM support in libvirt is just an extension to the generic QEMU
support. So you have to have a plain QEMU installed, as well as the
KVM-ified version. To avoid filename clashes it expects the KVM version
of QEMU to be named /usr/bin/qemu-kvm.

Regards,
Dan.
-- 
|=- Red Hat, Engineering, Emerging Technologies, Boston.  +1 978 392 2496 -=|
|=-           Perl modules: http://search.cpan.org/~danberr/              -=|
|=-               Projects: http://freshmeat.net/~danielpb/               -=|
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Re: a (bad) kvm story from a plain user

[Jorge Lucángeli Obes]

On 8/15/07, Daniel P. Berrange <berrange-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> wrote:
> On Wed, Aug 15, 2007 at 01:43:58AM -0300, Jorge Luc?ngeli Obes wrote:
> > On 8/15/07, Daniel P. Berrange <berrange-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> wrote:
> > Just today I was trying virt-manager and libvirt. I got this error
> > when creating a VM:
> >
> > Unable to complete install: 'virDomainCreateLinux() failed Cannot find
> > QEMU binary /usr/bin/qemu: No such file or directory'
>
> The KVM support in libvirt is just an extension to the generic QEMU
> support. So you have to have a plain QEMU installed, as well as the
> KVM-ified version. To avoid filename clashes it expects the KVM version
> of QEMU to be named /usr/bin/qemu-kvm.

Thanks. I had reached more or less that conclusion after looking at
'src/qemu_driver.c', but it's good to have confirmation.

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