* Question on RHEL 6 support
@ 2011-10-20 10:48 Alok Sinha
2011-10-20 14:00 ` Pasi Kärkkäinen
0 siblings, 1 reply; 15+ messages in thread
From: Alok Sinha @ 2011-10-20 10:48 UTC (permalink / raw)
To: Xen-devel
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Hi,
I am trying to run RHEL 6 as guest over XEN (RHEL 5.6 as host) hypervisor.
It seems that RHEL 6 loads the paravirt drivers by default and thus HVM mode is not working.
Any idea on this?
I saw somewhere that including xen_emul_unplug=never will help. Is there any other way it can be avoided?
-Alok
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^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: Question on RHEL 6 support
2011-10-20 10:48 Question on RHEL 6 support Alok Sinha
@ 2011-10-20 14:00 ` Pasi Kärkkäinen
2011-10-20 14:13 ` Alok Sinha
2011-10-21 4:59 ` Alok Sinha
0 siblings, 2 replies; 15+ messages in thread
From: Pasi Kärkkäinen @ 2011-10-20 14:00 UTC (permalink / raw)
To: Alok Sinha; +Cc: Xen-devel
On Thu, Oct 20, 2011 at 04:18:07PM +0530, Alok Sinha wrote:
> Hi,
Hello,
> I am trying to run RHEL 6 as guest over XEN (RHEL 5.6 as host)
> hypervisor.
> It seems that RHEL 6 loads the paravirt drivers by default and thus HVM
> mode is not working.
> Any idea on this?
What do you mean with "HVM mode is not working" ?
PVHVM drivers (for HVM guests) are there to make disk/net performance a LOT better!
The default qemu-dm emulated ide controller and realtek nic are not very efficient..
> I saw somewhere that including xen_emul_unplug=never will help. Is
> there any other way it can be avoided?
>
You can also disable the xen platform pci device for that VM from dom0,
then the VM will not activate PVHVM drivers.
-- Pasi
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: Question on RHEL 6 support
2011-10-20 14:00 ` Pasi Kärkkäinen
@ 2011-10-20 14:13 ` Alok Sinha
2011-10-21 4:59 ` Alok Sinha
1 sibling, 0 replies; 15+ messages in thread
From: Alok Sinha @ 2011-10-20 14:13 UTC (permalink / raw)
To: Pasi Kärkkäinen; +Cc: Xen-devel
[-- Attachment #1: Type: text/plain, Size: 951 bytes --]
Sent from my iPhone
On 20-Oct-2011, at 7:32 PM, "Pasi Kärkkäinen" <pasik@iki.fi> wrote:
> On Thu, Oct 20, 2011 at 04:18:07PM +0530, Alok Sinha wrote:
>> Hi,
>
> Hello,
>
>> I am trying to run RHEL 6 as guest over XEN (RHEL 5.6 as host)
>> hypervisor.
>> It seems that RHEL 6 loads the paravirt drivers by default and thus HVM
>> mode is not working.
>> Any idea on this?
>
> What do you mean with "HVM mode is not working" ?
>
> PVHVM drivers (for HVM guests) are there to make disk/net performance a LOT better!
> The default qemu-dm emulated ide controller and realtek nic are not very efficient..
>
>> I saw somewhere that including xen_emul_unplug=never will help. Is
>> there any other way it can be avoided?
>>
>
> You can also disable the xen platform pci device for that VM from dom0,
> then the VM will not activate PVHVM drivers.
>
> --
How? Is there cli/API?
Alok
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^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: Question on RHEL 6 support
2011-10-20 14:00 ` Pasi Kärkkäinen
2011-10-20 14:13 ` Alok Sinha
@ 2011-10-21 4:59 ` Alok Sinha
2011-10-21 6:11 ` Pasi Kärkkäinen
1 sibling, 1 reply; 15+ messages in thread
From: Alok Sinha @ 2011-10-21 4:59 UTC (permalink / raw)
To: Pasi Kärkkäinen; +Cc: Xen-devel
Pasi,
Thanks for your response.
So how do I disable xen platform device for VM? Any pointers?
-Alok
On Oct 20, 2011, at 7:30 PM, Pasi Kärkkäinen wrote:
> On Thu, Oct 20, 2011 at 04:18:07PM +0530, Alok Sinha wrote:
>> Hi,
>
> Hello,
>
>> I am trying to run RHEL 6 as guest over XEN (RHEL 5.6 as host)
>> hypervisor.
>> It seems that RHEL 6 loads the paravirt drivers by default and thus HVM
>> mode is not working.
>> Any idea on this?
>
> What do you mean with "HVM mode is not working" ?
>
> PVHVM drivers (for HVM guests) are there to make disk/net performance a LOT better!
> The default qemu-dm emulated ide controller and realtek nic are not very efficient..
>
>> I saw somewhere that including xen_emul_unplug=never will help. Is
>> there any other way it can be avoided?
>>
>
> You can also disable the xen platform pci device for that VM from dom0,
> then the VM will not activate PVHVM drivers.
>
> -- Pasi
>
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: Question on RHEL 6 support
2011-10-21 4:59 ` Alok Sinha
@ 2011-10-21 6:11 ` Pasi Kärkkäinen
2011-10-21 9:11 ` Alok Sinha
2011-10-21 13:24 ` Paolo Bonzini
0 siblings, 2 replies; 15+ messages in thread
From: Pasi Kärkkäinen @ 2011-10-21 6:11 UTC (permalink / raw)
To: Alok Sinha; +Cc: Xen-devel
On Fri, Oct 21, 2011 at 10:29:46AM +0530, Alok Sinha wrote:
> Pasi,
>
> Thanks for your response.
> So how do I disable xen platform device for VM? Any pointers?
>
You should be able to change it from /etc/xen/<name_of_the_vm> configfile.
Try:
xen_platform_pci=0
-- Pasi
>
> On Oct 20, 2011, at 7:30 PM, Pasi Kärkkäinen wrote:
>
> > On Thu, Oct 20, 2011 at 04:18:07PM +0530, Alok Sinha wrote:
> >> Hi,
> >
> > Hello,
> >
> >> I am trying to run RHEL 6 as guest over XEN (RHEL 5.6 as host)
> >> hypervisor.
> >> It seems that RHEL 6 loads the paravirt drivers by default and thus HVM
> >> mode is not working.
> >> Any idea on this?
> >
> > What do you mean with "HVM mode is not working" ?
> >
> > PVHVM drivers (for HVM guests) are there to make disk/net performance a LOT better!
> > The default qemu-dm emulated ide controller and realtek nic are not very efficient..
> >
> >> I saw somewhere that including xen_emul_unplug=never will help. Is
> >> there any other way it can be avoided?
> >>
> >
> > You can also disable the xen platform pci device for that VM from dom0,
> > then the VM will not activate PVHVM drivers.
> >
> > -- Pasi
> >
>
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: Question on RHEL 6 support
2011-10-21 6:11 ` Pasi Kärkkäinen
@ 2011-10-21 9:11 ` Alok Sinha
2011-10-21 10:34 ` Pasi Kärkkäinen
2011-10-21 13:24 ` Paolo Bonzini
1 sibling, 1 reply; 15+ messages in thread
From: Alok Sinha @ 2011-10-21 9:11 UTC (permalink / raw)
To: Pasi Kärkkäinen; +Cc: Xen-devel
Thanks Pasi. I am trying that.
By the way, I am getting following error while creating a HVM with rhel as guest:
"ERROR: no interface found for primary=eth0"
-Alok
On Oct 21, 2011, at 11:41 AM, Pasi Kärkkäinen wrote:
> On Fri, Oct 21, 2011 at 10:29:46AM +0530, Alok Sinha wrote:
>> Pasi,
>>
>> Thanks for your response.
>> So how do I disable xen platform device for VM? Any pointers?
>>
>
> You should be able to change it from /etc/xen/<name_of_the_vm> configfile.
>
> Try:
> xen_platform_pci=0
>
> -- Pasi
>
>>
>> On Oct 20, 2011, at 7:30 PM, Pasi Kärkkäinen wrote:
>>
>>> On Thu, Oct 20, 2011 at 04:18:07PM +0530, Alok Sinha wrote:
>>>> Hi,
>>>
>>> Hello,
>>>
>>>> I am trying to run RHEL 6 as guest over XEN (RHEL 5.6 as host)
>>>> hypervisor.
>>>> It seems that RHEL 6 loads the paravirt drivers by default and thus HVM
>>>> mode is not working.
>>>> Any idea on this?
>>>
>>> What do you mean with "HVM mode is not working" ?
>>>
>>> PVHVM drivers (for HVM guests) are there to make disk/net performance a LOT better!
>>> The default qemu-dm emulated ide controller and realtek nic are not very efficient..
>>>
>>>> I saw somewhere that including xen_emul_unplug=never will help. Is
>>>> there any other way it can be avoided?
>>>>
>>>
>>> You can also disable the xen platform pci device for that VM from dom0,
>>> then the VM will not activate PVHVM drivers.
>>>
>>> -- Pasi
>>>
>>
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: Question on RHEL 6 support
2011-10-21 9:11 ` Alok Sinha
@ 2011-10-21 10:34 ` Pasi Kärkkäinen
2011-10-21 13:41 ` Alok Sinha
0 siblings, 1 reply; 15+ messages in thread
From: Pasi Kärkkäinen @ 2011-10-21 10:34 UTC (permalink / raw)
To: Alok Sinha; +Cc: Xen-devel
On Fri, Oct 21, 2011 at 02:41:36PM +0530, Alok Sinha wrote:
> Thanks Pasi. I am trying that.
>
> By the way, I am getting following error while creating a HVM with rhel as guest:
>
>
> "ERROR: no interface found for primary=eth0"
>
Where do you get that error? on dom0? in domU ? When does that happen?
-- Pasi
>
>
>
> On Oct 21, 2011, at 11:41 AM, Pasi Kärkkäinen wrote:
>
> > On Fri, Oct 21, 2011 at 10:29:46AM +0530, Alok Sinha wrote:
> >> Pasi,
> >>
> >> Thanks for your response.
> >> So how do I disable xen platform device for VM? Any pointers?
> >>
> >
> > You should be able to change it from /etc/xen/<name_of_the_vm> configfile.
> >
> > Try:
> > xen_platform_pci=0
> >
> > -- Pasi
> >
> >>
> >> On Oct 20, 2011, at 7:30 PM, Pasi Kärkkäinen wrote:
> >>
> >>> On Thu, Oct 20, 2011 at 04:18:07PM +0530, Alok Sinha wrote:
> >>>> Hi,
> >>>
> >>> Hello,
> >>>
> >>>> I am trying to run RHEL 6 as guest over XEN (RHEL 5.6 as host)
> >>>> hypervisor.
> >>>> It seems that RHEL 6 loads the paravirt drivers by default and thus HVM
> >>>> mode is not working.
> >>>> Any idea on this?
> >>>
> >>> What do you mean with "HVM mode is not working" ?
> >>>
> >>> PVHVM drivers (for HVM guests) are there to make disk/net performance a LOT better!
> >>> The default qemu-dm emulated ide controller and realtek nic are not very efficient..
> >>>
> >>>> I saw somewhere that including xen_emul_unplug=never will help. Is
> >>>> there any other way it can be avoided?
> >>>>
> >>>
> >>> You can also disable the xen platform pci device for that VM from dom0,
> >>> then the VM will not activate PVHVM drivers.
> >>>
> >>> -- Pasi
> >>>
> >>
>
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: Question on RHEL 6 support
2011-10-21 6:11 ` Pasi Kärkkäinen
2011-10-21 9:11 ` Alok Sinha
@ 2011-10-21 13:24 ` Paolo Bonzini
2011-10-21 13:40 ` Alok Sinha
2011-10-21 14:14 ` Pasi Kärkkäinen
1 sibling, 2 replies; 15+ messages in thread
From: Paolo Bonzini @ 2011-10-21 13:24 UTC (permalink / raw)
To: Pasi Kärkkäinen; +Cc: Xen-devel, Alok Sinha
On 10/21/2011 08:11 AM, Pasi Kärkkäinen wrote:
>> >
>> > Thanks for your response.
>> > So how do I disable xen platform device for VM? Any pointers?
>> >
> You should be able to change it from/etc/xen/<name_of_the_vm> configfile.
>
> Try:
> xen_platform_pci=0
That doesn't exist.
Paolo
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: Question on RHEL 6 support
2011-10-21 13:24 ` Paolo Bonzini
@ 2011-10-21 13:40 ` Alok Sinha
2011-10-21 13:43 ` Paolo Bonzini
2011-10-21 14:14 ` Pasi Kärkkäinen
1 sibling, 1 reply; 15+ messages in thread
From: Alok Sinha @ 2011-10-21 13:40 UTC (permalink / raw)
To: Paolo Bonzini; +Cc: Thomas, Xen-devel, Graves
Hmm...any other alternatives?
-Alok
On Oct 21, 2011, at 6:54 PM, Paolo Bonzini wrote:
> On 10/21/2011 08:11 AM, Pasi Kärkkäinen wrote:
>>>>
>>>> Thanks for your response.
>>>> So how do I disable xen platform device for VM? Any pointers?
>>>>
>> You should be able to change it from/etc/xen/<name_of_the_vm> configfile.
>>
>> Try:
>> xen_platform_pci=0
>
> That doesn't exist.
>
> Paolo
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: Question on RHEL 6 support
2011-10-21 10:34 ` Pasi Kärkkäinen
@ 2011-10-21 13:41 ` Alok Sinha
0 siblings, 0 replies; 15+ messages in thread
From: Alok Sinha @ 2011-10-21 13:41 UTC (permalink / raw)
To: Pasi Kärkkäinen; +Cc: Xen-devel
This happens when I am creating the VM. This leaves the VM imaging incomplete,
-Alok
On Oct 21, 2011, at 4:04 PM, Pasi Kärkkäinen wrote:
> On Fri, Oct 21, 2011 at 02:41:36PM +0530, Alok Sinha wrote:
>> Thanks Pasi. I am trying that.
>>
>> By the way, I am getting following error while creating a HVM with rhel as guest:
>>
>>
>> "ERROR: no interface found for primary=eth0"
>>
>
> Where do you get that error? on dom0? in domU ? When does that happen?
>
> -- Pasi
>
>
>>
>>
>>
>> On Oct 21, 2011, at 11:41 AM, Pasi Kärkkäinen wrote:
>>
>>> On Fri, Oct 21, 2011 at 10:29:46AM +0530, Alok Sinha wrote:
>>>> Pasi,
>>>>
>>>> Thanks for your response.
>>>> So how do I disable xen platform device for VM? Any pointers?
>>>>
>>>
>>> You should be able to change it from /etc/xen/<name_of_the_vm> configfile.
>>>
>>> Try:
>>> xen_platform_pci=0
>>>
>>> -- Pasi
>>>
>>>>
>>>> On Oct 20, 2011, at 7:30 PM, Pasi Kärkkäinen wrote:
>>>>
>>>>> On Thu, Oct 20, 2011 at 04:18:07PM +0530, Alok Sinha wrote:
>>>>>> Hi,
>>>>>
>>>>> Hello,
>>>>>
>>>>>> I am trying to run RHEL 6 as guest over XEN (RHEL 5.6 as host)
>>>>>> hypervisor.
>>>>>> It seems that RHEL 6 loads the paravirt drivers by default and thus HVM
>>>>>> mode is not working.
>>>>>> Any idea on this?
>>>>>
>>>>> What do you mean with "HVM mode is not working" ?
>>>>>
>>>>> PVHVM drivers (for HVM guests) are there to make disk/net performance a LOT better!
>>>>> The default qemu-dm emulated ide controller and realtek nic are not very efficient..
>>>>>
>>>>>> I saw somewhere that including xen_emul_unplug=never will help. Is
>>>>>> there any other way it can be avoided?
>>>>>>
>>>>>
>>>>> You can also disable the xen platform pci device for that VM from dom0,
>>>>> then the VM will not activate PVHVM drivers.
>>>>>
>>>>> -- Pasi
>>>>>
>>>>
>>
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: Question on RHEL 6 support
2011-10-21 13:40 ` Alok Sinha
@ 2011-10-21 13:43 ` Paolo Bonzini
2011-10-21 13:50 ` Alok Sinha
0 siblings, 1 reply; 15+ messages in thread
From: Paolo Bonzini @ 2011-10-21 13:43 UTC (permalink / raw)
To: Alok Sinha; +Cc: Xen-devel, Thomas Graves
On 10/21/2011 03:40 PM, Alok Sinha wrote:
> Hmm...any other alternatives?
Hard to see without dmesg output or something like that. It's simpler
if you open a support ticket or BZ with Red Hat, since the Xen version
in RHEL is quite old.
Paolo
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: Question on RHEL 6 support
2011-10-21 13:43 ` Paolo Bonzini
@ 2011-10-21 13:50 ` Alok Sinha
2011-10-21 13:55 ` Paolo Bonzini
0 siblings, 1 reply; 15+ messages in thread
From: Alok Sinha @ 2011-10-21 13:50 UTC (permalink / raw)
To: Paolo Bonzini; +Cc: Thomas, Xen-devel, Graves
We have XEN 3.4.3 loaded, is that old?
Does RHEL 6 has compatibility issue with XEN 3? Does it need XEN 4?
-Alok
On Oct 21, 2011, at 7:13 PM, Paolo Bonzini wrote:
> On 10/21/2011 03:40 PM, Alok Sinha wrote:
>> Hmm...any other alternatives?
>
> Hard to see without dmesg output or something like that. It's simpler
> if you open a support ticket or BZ with Red Hat, since the Xen version
> in RHEL is quite old.
>
> Paolo
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: Question on RHEL 6 support
2011-10-21 13:50 ` Alok Sinha
@ 2011-10-21 13:55 ` Paolo Bonzini
0 siblings, 0 replies; 15+ messages in thread
From: Paolo Bonzini @ 2011-10-21 13:55 UTC (permalink / raw)
To: Alok Sinha; +Cc: Xen-devel, Thomas Graves
On 10/21/2011 03:50 PM, Alok Sinha wrote:
> We have XEN 3.4.3 loaded, is that old?
Ah ok, I understood you were using RHEL5's own Xen. As I said, if you
open a BZ you can upload your configuration and serial console output
there. Without those it's not worth guessing.
> Does RHEL 6 has compatibility issue with XEN 3? Does it need XEN 4?
It runs on RHEL5's own Xen, which is 3.1.2 -- with a lot of patches, but
none particularly targeted to RHEL6. If your hypervisor had problems
with RHEL6 it would not go past GRUB at all, I think.
Paolo
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: Question on RHEL 6 support
2011-10-21 13:24 ` Paolo Bonzini
2011-10-21 13:40 ` Alok Sinha
@ 2011-10-21 14:14 ` Pasi Kärkkäinen
2011-10-22 11:01 ` Paolo Bonzini
1 sibling, 1 reply; 15+ messages in thread
From: Pasi Kärkkäinen @ 2011-10-21 14:14 UTC (permalink / raw)
To: Paolo Bonzini; +Cc: Xen-devel, Alok Sinha, Ian Campbell, Stefano Stabellini
On Fri, Oct 21, 2011 at 03:24:29PM +0200, Paolo Bonzini wrote:
> On 10/21/2011 08:11 AM, Pasi Kärkkäinen wrote:
>>> >
>>> > Thanks for your response.
>>> > So how do I disable xen platform device for VM? Any pointers?
>>> >
>> You should be able to change it from/etc/xen/<name_of_the_vm> configfile.
>>
>> Try:
>> xen_platform_pci=0
>
> That doesn't exist.
>
Hmm, or is it:
xen_platform_device=0
Anyway there definitely is a configuration option for controlling the xen platform pci device,
which can enable or disable PVHVM drivers.
I can't just remember which one the option is called..
(and I can't grep the sources right now.. travelling.)
-- Pasi
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: Question on RHEL 6 support
2011-10-21 14:14 ` Pasi Kärkkäinen
@ 2011-10-22 11:01 ` Paolo Bonzini
0 siblings, 0 replies; 15+ messages in thread
From: Paolo Bonzini @ 2011-10-22 11:01 UTC (permalink / raw)
To: Pasi Kärkkäinen
Cc: Xen-devel, Alok Sinha, Ian Campbell, Stefano Stabellini
On 10/21/2011 04:14 PM, Pasi Kärkkäinen wrote:
>>> >> Try:
>>> >> xen_platform_pci=0
>> >
>> > That doesn't exist.
>> >
> Hmm, or is it:
> xen_platform_device=0
>
> Anyway there definitely is a configuration option for controlling the xen platform pci device,
> which can enable or disable PVHVM drivers.
>
> I can't just remember which one the option is called..
> (and I can't grep the sources right now.. travelling.)
It's xen_platform_pci, but it doesn't exist on either RHEL5 Xen or 3.4.
Paolo
^ permalink raw reply [flat|nested] 15+ messages in thread
end of thread, other threads:[~2011-10-22 11:01 UTC | newest]
Thread overview: 15+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2011-10-20 10:48 Question on RHEL 6 support Alok Sinha
2011-10-20 14:00 ` Pasi Kärkkäinen
2011-10-20 14:13 ` Alok Sinha
2011-10-21 4:59 ` Alok Sinha
2011-10-21 6:11 ` Pasi Kärkkäinen
2011-10-21 9:11 ` Alok Sinha
2011-10-21 10:34 ` Pasi Kärkkäinen
2011-10-21 13:41 ` Alok Sinha
2011-10-21 13:24 ` Paolo Bonzini
2011-10-21 13:40 ` Alok Sinha
2011-10-21 13:43 ` Paolo Bonzini
2011-10-21 13:50 ` Alok Sinha
2011-10-21 13:55 ` Paolo Bonzini
2011-10-21 14:14 ` Pasi Kärkkäinen
2011-10-22 11:01 ` Paolo Bonzini
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