could not open /dev/kvm

could not open /dev/kvm

[Benjamin Budts]

Hi,

I'm running debian, installed kvm-18 from source, it installed fine...

I have an intel s5000pal motherboard with dual core xeon 64bit, 
virtualization enabled in my bios.

question 1 : is it normal i dont have this file : qemu-system-x86_64 , i 
only have the qemu file in my /bin

kvm and kvm_intel load fine with modprobe without errors or info in dmesg.

toranaga:/usr/src/kvm-18# lsmod
Module                  Size  Used by
kvm_intel              19852  0
kvm                    55128  1 kvm_intel

I did the following :

./qemu-img create -f qcow2 /virtual/test/vtest.img 5G
works out fine...

./qemu . -hda /virtual/test/vtest.img -cdrom /virtual/win_corp.iso -boot 
d -m 512 -no-acpi

gives the following error : could not open /dev/kvm ...

in /proc/misc I found kvm as well :

  62 kvm

but I dont have the /dev/kvm  ... udev is installed though

can someone push me in the right direction please ?  :)

thx !

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Re: could not open /dev/kvm

[Avi Kivity]

Benjamin Budts wrote:
> Hi,
>
> I'm running debian, installed kvm-18 from source, it installed fine...
>
> I have an intel s5000pal motherboard with dual core xeon 64bit, 
> virtualization enabled in my bios.
>
> question 1 : is it normal i dont have this file : qemu-system-x86_64 , i 
> only have the qemu file in my /bin
>
> kvm and kvm_intel load fine with modprobe without errors or info in dmesg.
>
> toranaga:/usr/src/kvm-18# lsmod
> Module                  Size  Used by
> kvm_intel              19852  0
> kvm                    55128  1 kvm_intel
>
> I did the following :
>
> ./qemu-img create -f qcow2 /virtual/test/vtest.img 5G
> works out fine...
>
> ./qemu . -hda /virtual/test/vtest.img -cdrom /virtual/win_corp.iso -boot 
> d -m 512 -no-acpi
>
> gives the following error : could not open /dev/kvm ...
>
> in /proc/misc I found kvm as well :
>
>   62 kvm
>
> but I dont have the /dev/kvm  ... udev is installed though
>
> can someone push me in the right direction please ?  :)
>
>   

Is udevd alive?  What does 'pgrep udevd' show?

Does udevtrigger help?

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


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Re: could not open /dev/kvm

[Benjamin Budts]

Hi,

I made an mknod myself now, did a cat of /sys/class/misc/kvm/dev
18 64

and did a
mknod /dev/kvm c 18 64

everything OK now

how come I dont have the /dev automatically ?

udevtrigger didn't help, pgrep udevd showed the pid of udevd... so it 
was alive and kicking.
even recompiled the whole thing with modules loaded and had the same 
problem. recreated it manually with mknod...

i'm running the latest stable debian etch kernel 2.6.20.7

grtZ

Ben


Avi Kivity wrote:
> Benjamin Budts wrote:
>   
>> Hi,
>>
>> I'm running debian, installed kvm-18 from source, it installed fine...
>>
>> I have an intel s5000pal motherboard with dual core xeon 64bit, 
>> virtualization enabled in my bios.
>>
>> question 1 : is it normal i dont have this file : qemu-system-x86_64 , i 
>> only have the qemu file in my /bin
>>
>> kvm and kvm_intel load fine with modprobe without errors or info in dmesg.
>>
>> toranaga:/usr/src/kvm-18# lsmod
>> Module                  Size  Used by
>> kvm_intel              19852  0
>> kvm                    55128  1 kvm_intel
>>
>> I did the following :
>>
>> ./qemu-img create -f qcow2 /virtual/test/vtest.img 5G
>> works out fine...
>>
>> ./qemu . -hda /virtual/test/vtest.img -cdrom /virtual/win_corp.iso -boot 
>> d -m 512 -no-acpi
>>
>> gives the following error : could not open /dev/kvm ...
>>
>> in /proc/misc I found kvm as well :
>>
>>   62 kvm
>>
>> but I dont have the /dev/kvm  ... udev is installed though
>>
>> can someone push me in the right direction please ?  :)
>>
>>   
>>     
>
> Is udevd alive?  What does 'pgrep udevd' show?
>
> Does udevtrigger help?
>
>   


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Re: could not open /dev/kvm

[Avi Kivity]

Benjamin Budts wrote:
> Hi,
>
> I made an mknod myself now, did a cat of /sys/class/misc/kvm/dev
> 18 64
>
> and did a
> mknod /dev/kvm c 18 64
>
> everything OK now
>
> how come I dont have the /dev automatically ?
>
> udevtrigger didn't help, pgrep udevd showed the pid of udevd... so it 
> was alive and kicking.
> even recompiled the whole thing with modules loaded and had the same 
> problem. recreated it manually with mknod...
>
> i'm running the latest stable debian etch kernel 2.6.20.7
>
>   

Sorry, no idea.  Maybe as the debian people?

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


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