kvm troubles

kvm troubles

[Divick Kishore]

Hi,
     I am trying to run qemu with kvm on my machine but with no
success. My system configuration is:

Debian: 5.0.3 (lenny)
uname -a reports the following:

Linux divkis01-pc 2.6.26-2-686 #1 SMP Wed Nov 4 20:45:37 UTC 2009 i686 GNU/Linux

The mother bios has virtualization enabled and my processor Intel Core
2 Duo 8400 __supports__ Intel-VT.


cat /proc/cpuinfo | grep vmx
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm
constant_tsc arch_perfmon pebs bts pni monitor ds_cpl vmx smx est tm2
ssse3 cx16 xtpr sse4_1 lahf_lm
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm
constant_tsc arch_perfmon pebs bts pni monitor ds_cpl vmx smx est tm2
ssse3 cx16 xtpr sse4_1 lahf_lm

The things that I have already tried are:

1. Installed the kvm using apt. The version of kvm is shown below.

 dpkg --list kvm*
||/ Name                              Version
 Description
+++-=================================-=================================-==================================================================================
ii  kvm                               72+dfsg-5~lenny3
 Full virtualization on x86 hardware
un  kvm-data                          <none>
 (no description available)
ii  kvm-source                        72+dfsg-5~lenny3
 Source for the KVM driver

2. Installed qemu version 0.9.1. dpkg --list qemu* shows:

||/ Name                              Version
 Description
+++-=================================-=================================-==================================================================================
ii  qemu                              0.9.1-10lenny1
 fast processor emulator


With this when I try to run the qemu, it runs but it is slow. I don't
see any errors or any messages in dmesg as suggested in the FAQ's on
http://www.linux-kvm.org/page/FAQ in section "Troubleshooting". I also
see that in my case kvm module is loaded properly and the permission
are also readable for all users. i.e. the output is the following on
my machine:

ls -al /dev/kvm
crw-rw-rw- 1 root root 10, 232 2009-12-23 10:11 /dev/kvm

and

lsmod | grep kvm
kvm_intel              31168  0
kvm                   106588  1 kvm_intel


I then installed the kqemu as suggested on the page:
http://wiki.debian.org/QEMU, and this seems to work for me. But If I
understand correctly then still kvm is not being utilized in my case.
Please suggest what am I missing in my setup.

I have even tried building from qemu-0.12.1 from source but I see the
following errors :

./configure --enable-kvm
#error Missing KVM capability KVM_CAP_DESTROY_MEMORY_REGION_WORKS
      NOTE: To enable KVM support, update your kernel to 2.6.29+ or
install   recent kvm-kmod from http://sourceforge.net/projects/kvm.
ERROR
ERROR: User requested feature kvm
ERROR: configure was not able to find it
ERROR

After this I read the following post
https://bugs.launchpad.net/qemu/+bug/494500, but it has confused me
even more, as there doesn't seem to be any conclusion on the bug
report.

I am quite confused with what combination of kernel, qemu, kqemu and
OS works / doesn't work.

Any help is appreciated. Since I am not registered on the list, please
cc me in the reply.

Thanks,
Divick

Re: kvm troubles

[Thomas Mueller]

Am Thu, 24 Dec 2009 16:33:38 +0530 schrieb Divick Kishore:

> Hi,
>      I am trying to run qemu with kvm on my machine but with no
> success. My system configuration is:
> 
> Debian: 5.0.3 (lenny)
> uname -a reports the following:
> 
> Linux divkis01-pc 2.6.26-2-686 #1 SMP Wed Nov 4 20:45:37 UTC 2009 i686
> GNU/Linux
> 

kvm in debian lenny is very outdated.

* use backports package linux-image-2.6.30-bpo.2-amd64 (www.backports.org)
or 
* or get kvm-kmod-2.6.32 and compile for your current kernel

and
* qemu-kvm versions from http://www.corpit.ru/debian/tls/kvm/ (package 
qemu-kvm_0.11.0+dfsg-1tls_amd64.deb) ( ensure that the old kvm package is 
gone - aptitude purge kvm )



- Thomas

Re: kvm troubles

[Avi Kivity]

On 12/24/2009 01:03 PM, Divick Kishore wrote:
> I have even tried building from qemu-0.12.1 from source but I see the
> following errors :
>
>    

Use qemu-kvm-0.12.1.1 (may need --disable-xen).  Upstream qemu-0.12.1 
lacks smp support for kvm.

-- 
error compiling committee.c: too many arguments to function

Re: kvm troubles

[Divick Kishore]

Hi,
    thanks for the immediate reply.

> or
> * or get kvm-kmod-2.6.32 and compile for your current kernel

I downloaded this and now it is installed. Doing dpkg --list kvm*
shows the following:

||/ Name                              Version
 Description
+++-=================================-=================================-==================================================================================
pn  kvm                               <none>
 (no description available)
un  kvm-data                          <none>
 (no description available)
ii  kvm-kmod                          2.6.32-1
 kvm-kmod-self-compiled
pn  kvm-source                        <none>
 (no description available)

> and
> * qemu-kvm versions from http://www.corpit.ru/debian/tls/kvm/ (package
> qemu-kvm_0.11.0+dfsg-1tls_amd64.deb) ( ensure that the old kvm package is
> gone - aptitude purge kvm )

I tried to install qemu-kvm but I am not sure what it does. After
installing this when I run qemu (installed previously, it complains
with the following message:

 qemu vdisk.img
Could not open '/dev/kqemu' - QEMU acceleration layer not activated:
No such file or directory

Then I installed the qemu-kvm-0.12.1.1, but it complains during
./configure that:

Error: libpci check failed
Disable KVM Device Assignment capability.

But it seems to build fine. I then installed it using:

sudo checkinstall and this installs the qemu in
/usr/local/bin/qemu-system-x86_64.

When I run this I get the following error:
 /usr/local/bin/qemu-system-x86_64 vdisk.img
exception 13 (0)
rax 0000000000000010 rbx 0000000000008c00 rcx 0000000000006e56 rdx
00000000000c8c00
rsi 00000000f2010000 rdi 00000000000c0000 rsp 0000000000006e4c rbp
00000000000fd3e4
r8  0000000000000000 r9  0000000000000000 r10 0000000000000000 r11
0000000000000000
r12 0000000000000000 r13 0000000000000000 r14 0000000000000000 r15
0000000000000000
rip 00000000000fc45a rflags 00033002
cs 0000 (00000000/0000ffff p 1 dpl 3 db 0 s 1 type 3 l 0 g 0 avl 0)
ds 0000 (00000000/0000ffff p 1 dpl 3 db 0 s 1 type 3 l 0 g 0 avl 0)
es 0000 (00000000/0000ffff p 1 dpl 3 db 0 s 1 type 3 l 0 g 0 avl 0)
ss 0000 (00000000/0000ffff p 1 dpl 3 db 0 s 1 type 3 l 0 g 0 avl 0)
fs 0000 (00000000/0000ffff p 1 dpl 3 db 0 s 1 type 3 l 0 g 0 avl 0)
gs 0000 (00000000/0000ffff p 1 dpl 3 db 0 s 1 type 3 l 0 g 0 avl 0)
tr 0000 (feffd000/00002088 p 1 dpl 0 db 0 s 0 type b l 0 g 0 avl 0)
ldt 0000 (00000000/0000ffff p 1 dpl 0 db 0 s 0 type 2 l 0 g 0 avl 0)
gdt fcb90/37
idt fdc00/0
cr0 10 cr2 0 cr3 0 cr4 0 cr8 0 efer 0
code: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 -->
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00
Aborted

Please suggest that what am I doing wrong.

Thanks again,
Divick

Re: kvm troubles

[Divick Kishore]

Hi,

> package name is qemu-kvm, executable name is just kvm. (see packages file
> list: dpkg -L qemu-kvm). do remove qemu.
>

I don't see any executable by the name kvm. See the output of dpkg -L
qemu-kvm and dpkg -L  kvm-kmod. But I do see an executable by the name
qemu-system-x86_64 and I am trying to use the same to run an OS image.
I have even tried to uninstall qemu from my system and then also I see
the same crash as listed in the earlier post.

dpkg -L qemu-kvm
/.
/usr
/usr/share
/usr/share/doc
/usr/share/doc/qemu-kvm
/usr/share/doc/qemu-kvm/Changelog
/usr/share/doc/qemu-kvm/LICENSE
/usr/share/doc/qemu-kvm/COPYING
/usr/share/doc/qemu-kvm/TODO
/usr/share/doc/qemu-kvm/README
/usr/share/doc/qemu-kvm/VERSION
/usr/share/doc/qemu-kvm/COPYING.LIB
/usr/local
/usr/local/share
/usr/local/share/man
/usr/local/share/man/man8
/usr/local/share/man/man8/qemu-nbd.8.gz
/usr/local/share/man/man1
/usr/local/share/man/man1/qemu-img.1.gz
/usr/local/share/man/man1/qemu.1.gz
/usr/local/share/qemu
/usr/local/share/qemu/petalogix-s3adsp1800.dtb
/usr/local/share/qemu/openbios-ppc
/usr/local/share/qemu/openbios-sparc32
/usr/local/share/qemu/keymaps
/usr/local/share/qemu/keymaps/en-gb
/usr/local/share/qemu/keymaps/common
/usr/local/share/qemu/keymaps/modifiers
/usr/local/share/qemu/keymaps/ja
/usr/local/share/qemu/keymaps/fr-ca
/usr/local/share/qemu/keymaps/de-ch
/usr/local/share/qemu/keymaps/nl-be
/usr/local/share/qemu/keymaps/fr
/usr/local/share/qemu/keymaps/sv
/usr/local/share/qemu/keymaps/de
/usr/local/share/qemu/keymaps/en-us
/usr/local/share/qemu/keymaps/ar
/usr/local/share/qemu/keymaps/fr-ch
/usr/local/share/qemu/keymaps/is
/usr/local/share/qemu/keymaps/tr
/usr/local/share/qemu/keymaps/sl
/usr/local/share/qemu/keymaps/it
/usr/local/share/qemu/keymaps/fi
/usr/local/share/qemu/keymaps/hr
/usr/local/share/qemu/keymaps/nl
/usr/local/share/qemu/keymaps/hu
/usr/local/share/qemu/keymaps/es
/usr/local/share/qemu/keymaps/mk
/usr/local/share/qemu/keymaps/lt
/usr/local/share/qemu/keymaps/da
/usr/local/share/qemu/keymaps/lv
/usr/local/share/qemu/keymaps/fo
/usr/local/share/qemu/keymaps/ru
/usr/local/share/qemu/keymaps/th
/usr/local/share/qemu/keymaps/pt
/usr/local/share/qemu/keymaps/no
/usr/local/share/qemu/keymaps/pt-br
/usr/local/share/qemu/keymaps/pl
/usr/local/share/qemu/keymaps/et
/usr/local/share/qemu/keymaps/fr-be
/usr/local/share/qemu/ppc_rom.bin
/usr/local/share/qemu/pxe-pcnet.bin
/usr/local/share/qemu/bamboo.dtb
/usr/local/share/qemu/vapic.bin
/usr/local/share/qemu/pxe-virtio.bin
/usr/local/share/qemu/pxe-rtl8139.bin
/usr/local/share/qemu/extboot.bin
/usr/local/share/qemu/video.x
/usr/local/share/qemu/vgabios-cirrus.bin
/usr/local/share/qemu/multiboot.bin
/usr/local/share/qemu/bios.bin
/usr/local/share/qemu/openbios-sparc64
/usr/local/share/qemu/pxe-i82559er.bin
/usr/local/share/qemu/vgabios.bin
/usr/local/share/qemu/pxe-e1000.bin
/usr/local/share/qemu/pxe-ne2k_pci.bin
/usr/local/share/qemu/linuxboot.bin
/usr/local/share/doc
/usr/local/share/doc/qemu
/usr/local/share/doc/qemu/qemu-tech.html
/usr/local/share/doc/qemu/qemu-doc.html
/usr/local/bin
/usr/local/bin/qemu-system-x86_64
/usr/local/bin/qemu-nbd
/usr/local/bin/qemu-io
/usr/local/bin/qemu-img

dpkg -L kvm-kmod
/.
/lib
/lib/modules
/lib/modules/2.6.26-2-686
/usr
/usr/src
/usr/src/linux-source-2.6.26
/usr/src/linux-source-2.6.26/kvm-intel.ko
/usr/src/linux-source-2.6.26/kvm.ko
/usr/src/linux-source-2.6.26/kvm-amd.ko
/usr/share
/usr/share/doc
/usr/share/doc/kvm-kmod
/usr/share/doc/kvm-kmod/COPYING
/usr/share/doc/kvm-kmod/README
/etc
/etc/udev
/etc/udev/rules.d
/etc/udev/rules.d/65-kvm.rules

Thanks,
Divick

Re: kvm troubles

[Michael Tokarev]

Divick Kishore wrote:
> Hi,
> 
>> package name is qemu-kvm, executable name is just kvm. (see packages file
>> list: dpkg -L qemu-kvm). do remove qemu.
> 
> I don't see any executable by the name kvm. See the output of dpkg -L
> qemu-kvm and dpkg -L  kvm-kmod. But I do see an executable by the name
> qemu-system-x86_64 and I am trying to use the same to run an OS image.
> I have even tried to uninstall qemu from my system and then also I see
> the same crash as listed in the earlier post.
> 
> dpkg -L qemu-kvm
> /.
> /usr
> /usr/share
> /usr/share/doc
> /usr/share/doc/qemu-kvm
> /usr/share/doc/qemu-kvm/Changelog
> /usr/share/doc/qemu-kvm/LICENSE
> /usr/share/doc/qemu-kvm/COPYING
> /usr/share/doc/qemu-kvm/TODO
> /usr/share/doc/qemu-kvm/README
> /usr/share/doc/qemu-kvm/VERSION
> /usr/share/doc/qemu-kvm/COPYING.LIB
> /usr/local
> /usr/local/share
> /usr/local/share/man
> /usr/local/share/man/man8
...


Where you got this package from?
It is not from www.corpit.ru for sure -- no of the
packages there contains /usr/local.  It's built
differently, to the point where it's impossible to
get files in improper place.

Please show me `dpkg -s qemu-kvm'.

[]
> /usr/local/bin/qemu-system-x86_64

That's the thing, but in my package it gets renamed
to kvm and placed to /usr/bin.

/mjt

Re: kvm troubles

[Divick Kishore]

Hi,

On Sat, Dec 26, 2009 at 1:48 AM, Michael Tokarev <mjt@tls.msk.ru> wrote:
> Divick Kishore wrote:
>> Hi,
>>
>>> package name is qemu-kvm, executable name is just kvm. (see packages file
>>> list: dpkg -L qemu-kvm). do remove qemu.
>>
>> I don't see any executable by the name kvm. See the output of dpkg -L
>> qemu-kvm and dpkg -L  kvm-kmod. But I do see an executable by the name
>> qemu-system-x86_64 and I am trying to use the same to run an OS image.
>> I have even tried to uninstall qemu from my system and then also I see
>> the same crash as listed in the earlier post.
>>
>> dpkg -L qemu-kvm
>> /.
>> /usr
>> /usr/share
>> /usr/share/doc
>> /usr/share/doc/qemu-kvm
>> /usr/share/doc/qemu-kvm/Changelog
>> /usr/share/doc/qemu-kvm/LICENSE
>> /usr/share/doc/qemu-kvm/COPYING
>> /usr/share/doc/qemu-kvm/TODO
>> /usr/share/doc/qemu-kvm/README
>> /usr/share/doc/qemu-kvm/VERSION
>> /usr/share/doc/qemu-kvm/COPYING.LIB
>> /usr/local
>> /usr/local/share
>> /usr/local/share/man
>> /usr/local/share/man/man8
> ...
>
>
> Where you got this package from?
> It is not from www.corpit.ru for sure -- no of the
> packages there contains /usr/local.  It's built
> differently, to the point where it's impossible to
> get files in improper place.
>
> Please show me `dpkg -s qemu-kvm'.

Yeah you are right this package is not from www.corpit.ru as the
package downloaded from this site does not install on my system. It
complains with the following message:

sudo dpkg -i qemu-kvm_0.11.0+dfsg-1tls_i386.deb
[sudo] password for divkis01:
dpkg - warning: downgrading qemu-kvm from 0.12.1.1-1 to 0.11.0+dfsg-1tls.
(Reading database ... 149365 files and directories currently installed.)
Preparing to replace qemu-kvm 0.12.1.1-1 (using
qemu-kvm_0.11.0+dfsg-1tls_i386.deb) ...
Unpacking replacement qemu-kvm ...
dpkg: warning - unable to delete old directory `/usr/local/share':
Directory not empty
dpkg: warning - unable to delete old directory `/usr/local': Directory not empty
dpkg: dependency problems prevent configuration of qemu-kvm:
 qemu-kvm depends on libgnutls26 (>= 2.7.14-0); however:
  Version of libgnutls26 on system is 2.4.2-6+lenny2.
dpkg: error processing qemu-kvm (--install):
 dependency problems - leaving unconfigured
Processing triggers for man-db ...
Errors were encountered while processing:
 qemu-kvm


Also I am not sure that as such packages __should__ not be downloaded
from any unknown site but only from trusted debian mirrors. Am I not
open to any security issues in case I install the package downloaded
from www.corpit.ru?

Thanks,
Divick

Re: kvm troubles

[Divick Kishore]

> Also I am not sure that as such packages __should__ not be downloaded
> from any unknown site but only from trusted debian mirrors. Am I not
> open to any security issues in case I install the package downloaded
> from www.corpit.ru?

Or in fact downloaded from any other site pointed out by someone on
the mailing list. Why should / should not trust packages downloaded
from non standard debian mirrors?

Thanks,
Divick

Re: kvm troubles

[Michael Tokarev]

Divick Kishore wrote:
>> Also I am not sure that as such packages __should__ not be downloaded
>> from any unknown site but only from trusted debian mirrors. Am I not
>> open to any security issues in case I install the package downloaded
>> from www.corpit.ru?
> 
> Or in fact downloaded from any other site pointed out by someone on
> the mailing list. Why should / should not trust packages downloaded
> from non standard debian mirrors?

Well, it's your choice really.

I maintained kvm (and later qemu-kvm) package for debian for a long
time because the one in debian is too old to be usable.  It was a long
way before I was able to communicate with debian maintainer, and now
I co-maintain it -- there is qemu-kvm-0.11.1 in -testing now, but it
depends on many other libraries in -testing.  For over a year kvm in
debian was unusable - so much for trusted/standard mirrors.

As of the error you've got -- you're the first to report it, apparently
no one else noticed that it depends on a single package that is not in
lenny -- it's libgnutls26.  You can install this library from -testing
or wait till I re-upload new version to www.corpit.ru.

/mjt

Re: kvm troubles

[Michael Tokarev]

Michael Tokarev ?????:
> Divick Kishore wrote:
>>> Also I am not sure that as such packages __should__ not be downloaded
>>> from any unknown site but only from trusted debian mirrors. Am I not
>>> open to any security issues in case I install the package downloaded
>>> from www.corpit.ru?
>> Or in fact downloaded from any other site pointed out by someone on
>> the mailing list. Why should / should not trust packages downloaded
>> from non standard debian mirrors?
> 
> Well, it's your choice really.
> 
> I maintained kvm (and later qemu-kvm) package for debian for a long
> time because the one in debian is too old to be usable.  It was a long
> way before I was able to communicate with debian maintainer, and now
> I co-maintain it -- there is qemu-kvm-0.11.1 in -testing now, but it
> depends on many other libraries in -testing.  For over a year kvm in
> debian was unusable - so much for trusted/standard mirrors.

By the way, it's no more risk when you grab any other software
and run it on your machines.  Like for example kvm from official
sources (and compile it) -- did you check for trojan horses and
the like in the source?

> As of the error you've got -- you're the first to report it, apparently
> no one else noticed that it depends on a single package that is not in
> lenny -- it's libgnutls26.  You can install this library from -testing
> or wait till I re-upload new version to www.corpit.ru.

Uploaded, still 0.11.0 - I have no time right now to update to 0.11.1
or 0.12 (and the latter is quite unstable anyway).  But 0.11.0 is a
good version.

Grab
qemu-kvm_0.11.0+dfsg-1tls2_amd64.deb or
qemu-kvm_0.11.0+dfsg-1tls2_i386.deb
depending on your arch.

/mjt

Re: kvm troubles

[Divick Kishore]

Hi,

>On Sat, Dec 26, 2009 at 2:50 AM, Michael Tokarev <mjt@tls.msk.ru> wrote:
> Michael Tokarev ?????:
>> Divick Kishore wrote:
> By the way, it's no more risk when you grab any other software
> and run it on your machines.  Like for example kvm from official
> sources (and compile it) -- did you check for trojan horses and
> the like in the source?

No I do not really check for any trojan horses or anything but I was
being curious that debian must be having some policy for maintenance /
distribution of packages. If not how can the debian community prevent
spread of malicious software, if any?

>> As of the error you've got -- you're the first to report it, apparently
>> no one else noticed that it depends on a single package that is not in
>> lenny -- it's libgnutls26.  You can install this library from -testing
>> or wait till I re-upload new version to www.corpit.ru.

That sounds little strange to me. I thought that since Virtualization
support is now common place on AMD/ Intel processors as well as most
decent motherboards, I expected lot of debian users to be using qemu +
kvm combination for virtualization. I found that with kvm enabled,
qemu is at least 10x faster (perceived :) ).Though I can't really say
without benchmarking if there was a real difference between qemu +
kqemu & qemu + kvm performance.

Aren't many people using kvm + qemu for h/w acceleration of
virtualization? If yes, do you know why is that the case, given it is
such a useful combination?

> Uploaded, still 0.11.0 - I have no time right now to update to 0.11.1
> or 0.12 (and the latter is quite unstable anyway).  But 0.11.0 is a
> good version.
>
> Grab
> qemu-kvm_0.11.0+dfsg-1tls2_amd64.deb or
> qemu-kvm_0.11.0+dfsg-1tls2_i386.deb
> depending on your arch.

Thanks a zillion, now I am able to install this package easily and it
seems to work fine for me.

Thanks again,
Regards,
Divick