Are 64bit Intel Core 2 Quad fedora 8 supported?

[George Refseth]

The 64 bit xen host kernel are unstable (timer/scheduling issue?)

So I wonder if this is supported or not. Another Fedora 8 x86_64  
installation on
an Intel Core 2 Duo seems to run flawlessly, except it is running on a  
laptop,
and not meant for server use.

Attached are smolt output.

I would be grateful for any input, this was meant to be a system where  
multiple
services should run (several 64bit F8's) serving dns, web and mail, and  
replace
at least two current lumps of hardware..

regards,
George

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[George Refseth]

It seems I got little attention with my original post.
The f8 64bit image hangs when starting X. Prior to that
the visual 'wait' circle keeps running around irregularily
at a lot than normal speed.

I observed the same on multi core AMD running RHEL 4, which
was cured with RHEL 5. So no I am happy on that multi-core
workstation.

But this new server I was trying to set up had definite problems
with the -21 xen kernel. It runs flawlessly with the f8 release
kernel (-23).

For testing, where should I pull down a newer xen-kernel that would
run with a full 64 bit f8 install? I would be happy to be a guinea pig
(as long as I can revert) using this system if I could be pointed to
repositories and forum where I could contribute..

thanks in advance,
George

On Wed, 26 Dec 2007 16:57:32 +0100, George Refseth  
<george.refseth(a)arxi.no&gt; wrote:

>  The 64 bit xen host kernel are unstable (timer/scheduling issue?)
>
>  So I wonder if this is supported or not. Another Fedora 8 x86_64
>  installation on
>  an Intel Core 2 Duo seems to run flawlessly, except it is running on a
>  laptop,
>  and not meant for server use.
>  
>  Attached are smolt output. 
See original post.

>  I would be grateful for any input, this was meant to be a system where
>  multiple
>  services should run (several 64bit F8's) serving dns, web and mail, and
>  replace
>  at least two current lumps of hardware..
>
>  regards,
>  George
>  


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[Daniel P. Berrange]

On Wed, Jan 02, 2008 at 04:34:52PM +0100, George Refseth wrote:
>  It seems I got little attention with my original post.
>  The f8 64bit image hangs when starting X. Prior to that
>  the visual 'wait' circle keeps running around irregularily
>  at a lot than normal speed.
>  
>  I observed the same on multi core AMD running RHEL 4, which
>  was cured with RHEL 5. So no I am happy on that multi-core
>  workstation.
>  
>  But this new server I was trying to set up had definite problems
>  with the -21 xen kernel. It runs flawlessly with the f8 release
>  kernel (-23).
>  
>  For testing, where should I pull down a newer xen-kernel that would
>  run with a full 64 bit f8 install? I would be happy to be a guinea pig
>  (as long as I can revert) using this system if I could be pointed to
>  repositories and forum where I could contribute.. 
I'm afraid the 2.6.21  series of kernel-xen will be the newest
we release for F-8 and earlier - its in bugfix only mode[1]. If there
is an easy bugfix we can do for 2.6.21 to make it work that's a
possiblity but we won't be doing .22 or .23 kernel-xen. I'd recommend
filing a BZ ticket with as many details of the problem you are seeing
as possible:

  http://bugzilla.redhat.com/

Regards,
Dan.

[1] This is because in Fedora-9 we are radically changing the way we 
    approach Xen kernels
    http://fedoraproject.org/wiki/Features/XenPvops


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[George Refseth]

On Wed, 02 Jan 2008 16:39:55 +0100, Daniel P. Berrange  
<berrange(a)redhat.com&gt; wrote:

>  On Wed, Jan 02, 2008 at 04:34:52PM +0100, George Refseth wrote:
> > It seems I got little attention with my original post.
> > The f8 64bit image hangs when starting X. Prior to that
> > the visual 'wait' circle keeps running around irregularily
> > at a lot than normal speed.
> >
> > I observed the same on multi core AMD running RHEL 4, which
> > was cured with RHEL 5. So no I am happy on that multi-core
> > workstation.
> >
> > But this new server I was trying to set up had definite problems
> > with the -21 xen kernel. It runs flawlessly with the f8 release
> > kernel (-23).
> >
> > For testing, where should I pull down a newer xen-kernel that would
> > run with a full 64 bit f8 install? I would be happy to be a guinea pig
> > (as long as I can revert) using this system if I could be pointed to
> > repositories and forum where I could contribute..
>
>  I'm afraid the 2.6.21  series of kernel-xen will be the newest
>  we release for F-8 and earlier - its in bugfix only mode[1]. If there
>  is an easy bugfix we can do for 2.6.21 to make it work that's a
>  possiblity but we won't be doing .22 or .23 kernel-xen. I'd recommend
>  filing a BZ ticket with as many details of the problem you are seeing
>  as possible: 
Thanks for a quick response, even if it doesn't really help me.
The system also won't boot in i386 mode with the latest BIOS, so I will
run non-virtualized 64 bit for testing purposes until you have a testable
xen enabled kernel for -25 (?) available and forgo the bug report.

Thanks again,
George


>    http://bugzilla.redhat.com/
>
>  Regards,
>  Dan.
>
>  [1] This is because in Fedora-9 we are radically changing the way we
>      approach Xen kernels
>      http://fedoraproject.org/wiki/Features/XenPvops
>
>  


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[John Summerfield]

George Refseth wrote:
>  On Wed, 02 Jan 2008 16:39:55 +0100, Daniel P. Berrange  

> > I'm afraid the 2.6.21  series of kernel-xen will be the
> newest
> > we release for F-8 and earlier - its in bugfix only mode[1]. If there
> > is an easy bugfix we can do for 2.6.21 to make it work that's a
> > possiblity but we won't be doing .22 or .23 kernel-xen. I'd recommend
> > filing a BZ ticket with as many details of the problem you are seeing
> > as possible:
>  
>  Thanks for a quick response, even if it doesn't really help me.
>  The system also won't boot in i386 mode with the latest BIOS, so I will
>  run non-virtualized 64 bit for testing purposes until you have a testable
>  xen enabled kernel for -25 (?) available and forgo the bug report. 
You could always try kvm.


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Cheers
John

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[Evan Lavelle]

George Refseth wrote:
>  The 64 bit xen host kernel are unstable (timer/scheduling issue?)
>  
>  So I wonder if this is supported or not. Another Fedora 8 x86_64 
>  installation on
>  an Intel Core 2 Duo seems to run flawlessly, except it is running on a 
>  laptop,
>  and not meant for server use. 
FWIW: I'm running F8 64-bit 2.6.21-2952, for both Dom0 and one DomU, on 
6600/Core 2 Duo, without problems. The DomU is HVM; it was originally PV 
but I gave up on that for complex reasons. Various other (non-Fedora) 
HVM domU's also work without problems.

Maybe it's just an issue with quad core. Can you turn off two cores in 
the BIOS?

Evan

[Dustin Henning]

	I am not running F8, all of my DomUs are HVM, and I am not running
64-bit OSes on any of them, so I was staying out of this one, but I am
running F7 64-bit with Xen kernel 2.6.21-6 on a Core 2 Quad, and since you
are having problems even with 32-bit PV guests, I thought that this might be
useful information.  Perhaps you have some sort of BIOS configuration issue
or something.
	Dustin

-----Original Message-----
From: fedora-xen-bounces(a)redhat.com [mailto:[e-mail]]
On Behalf Of Evan Lavelle
Sent: Wednesday, January 02, 2008 12:53
To: George Refseth
Cc: fedora-xen(a)redhat.com
Subject: Re: [Fedora-xen] Are 64bit Intel Core 2 Quad fedora 8 supported?

George Refseth wrote:
>  The 64 bit xen host kernel are unstable (timer/scheduling issue?)
>  
>  So I wonder if this is supported or not. Another Fedora 8 x86_64 
>  installation on
>  an Intel Core 2 Duo seems to run flawlessly, except it is running on a 
>  laptop,
>  and not meant for server use. 
FWIW: I'm running F8 64-bit 2.6.21-2952, for both Dom0 and one DomU, on 
6600/Core 2 Duo, without problems. The DomU is HVM; it was originally PV 
but I gave up on that for complex reasons. Various other (non-Fedora) 
HVM domU's also work without problems.

Maybe it's just an issue with quad core. Can you turn off two cores in 
the BIOS?

Evan

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[George Refseth]

On Wed, 02 Jan 2008 18:52:31 +0100, Evan Lavelle <sa212+fcxen(a)cyconix.com&gt;  
wrote:

>  George Refseth wrote:
> > The 64 bit xen host kernel are unstable (timer/scheduling issue?)
> >  So I wonder if this is supported or not. Another Fedora 8 x86_64  
> > installation on
> > an Intel Core 2 Duo seems to run flawlessly, except it is running on a  
> > laptop,
> > and not meant for server use.
>
>  FWIW: I'm running F8 64-bit 2.6.21-2952, for both Dom0 and one DomU, on  
>  6600/Core 2 Duo, without problems. The DomU is HVM; it was originally PV  
>  but I gave up on that for complex reasons. Various other (non-Fedora)  
>  HVM domU's also work without problems.
>
>  Maybe it's just an issue with quad core. 
Seems to be, or the motherboard and BIOS state at time of boot, except that
I expected the OS to take over not expect any state of the BIOS. I also  
have
no problem running a a new ASUS C90S Laptop with Core 2 Duo, both i386 and  
x86,
  both xen variant (.21-) and non-xen the released and the updated kernels  
(.23.1-42
& 23.9-85). I will continue experimenting on the laptop to prepare for  
virt. on
the server when it can support mother-board and cpu.

>  Can you turn off two cores in the BIOS?
>  
Not that I can figure out, the BIOS seems to expect the OS to take charge.

George



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