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Old 08-14-2008, 11:33 PM
Michael DeHaan
 
Default Installing RHEL 2 (yes, "*2*") inside a F9 KVM VM...

Daniel P. Berrange wrote:

On Thu, Aug 14, 2008 at 06:21:58PM -0400, Michael DeHaan wrote:

I'm not passing down variant now for virtinst API calls (but can
probably do this in a future
release if the user supplies it). Is there a suggestion to just make it
default to the compatible NIC that would
be good for all Fedora/RHEL (or are there performance issues in doing
this or something)?



That's the situation we've got already - we compile Xen and KVM to use
the rtl8139 nic since that's the best lowest-common denominator. It was
a barely passable approach so far, but with VirtIO it is now past its sell
by date and we have to key off os type/variant. If we don't then we'll
be limiting guests to 1/100 of the their potential performance. Not cool


Daniel



Yikes

I'll do some more manual creation tests tomorrow using the qemu command
line.
Passing in the OS version is doable as we should soon have "cobbler
import" storing that data.


Right now, it stores the name "RHEL5.2", etc, but that's not hard enough
to key off of.


--Michael


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Old 08-18-2008, 03:15 PM
Michael DeHaan
 
Default Installing RHEL 2 (yes, "*2*") inside a F9 KVM VM...

Michael DeHaan wrote:

Daniel P. Berrange wrote:

On Thu, Aug 14, 2008 at 06:21:58PM -0400, Michael DeHaan wrote:
I'm not passing down variant now for virtinst API calls (but can
probably do this in a future
release if the user supplies it). Is there a suggestion to just make
it default to the compatible NIC that would
be good for all Fedora/RHEL (or are there performance issues in
doing this or something)?


That's the situation we've got already - we compile Xen and KVM to use
the rtl8139 nic since that's the best lowest-common denominator. It was
a barely passable approach so far, but with VirtIO it is now past its
sell

by date and we have to key off os type/variant. If we don't then we'll
be limiting guests to 1/100 of the their potential performance. Not cool


Daniel


Yikes

I'll do some more manual creation tests tomorrow using the qemu
command line.
Passing in the OS version is doable as we should soon have "cobbler
import" storing that data.


Right now, it stores the name "RHEL5.2", etc, but that's not hard
enough to key off of.


--Michael


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Ok, so friday I tried walking through this with virt-manager and chose
the OS/variant as 2.1, and it picked the wrong network

driver there too and could not install 2.1.


--Michael

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Old 08-18-2008, 03:21 PM
Cole Robinson
 
Default Installing RHEL 2 (yes, "*2*") inside a F9 KVM VM...

Michael DeHaan wrote:
> Michael DeHaan wrote:
>> Daniel P. Berrange wrote:
>>> On Thu, Aug 14, 2008 at 06:21:58PM -0400, Michael DeHaan wrote:
>>>> I'm not passing down variant now for virtinst API calls (but can
>>>> probably do this in a future
>>>> release if the user supplies it). Is there a suggestion to just make
>>>> it default to the compatible NIC that would
>>>> be good for all Fedora/RHEL (or are there performance issues in
>>>> doing this or something)?
>>> That's the situation we've got already - we compile Xen and KVM to use
>>> the rtl8139 nic since that's the best lowest-common denominator. It was
>>> a barely passable approach so far, but with VirtIO it is now past its
>>> sell
>>> by date and we have to key off os type/variant. If we don't then we'll
>>> be limiting guests to 1/100 of the their potential performance. Not cool
>>>
>>>
>>> Daniel
>> Yikes
>>
>> I'll do some more manual creation tests tomorrow using the qemu
>> command line.
>> Passing in the OS version is doable as we should soon have "cobbler
>> import" storing that data.
>>
>> Right now, it stores the name "RHEL5.2", etc, but that's not hard
>> enough to key off of.
>>
>> --Michael
>>
>>
>
> Ok, so friday I tried walking through this with virt-manager and chose
> the OS/variant as 2.1, and it picked the wrong network
> driver there too and could not install 2.1.
>
>
> --Michael
>

Virt-manager just calls out to virtinst for this, so all
the choosing is centralized.

Also, prior to a week ago upstream we weren't doing any
distro specific hardware selection for networking, everything
was just using the default nic model rtl8139.

- Cole

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