Re: [Xen-users] Xen3.3 / Xen3.4 CPU soft lockups under pvops 2.6.31/2.6.32

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Fri, Apr 09, 2010 at 12:38:19AM +0200, Pim van Riezen wrote:
>    On Apr 8, 2010, at 16:28 , Pasi Kärkkäinen wrote:
> 
>      On Thu, Apr 08, 2010 at 01:34:24AM +0200, Pim van Riezen wrote:
> 
>        We're trying to get 2.6.31 and 2.6.32 rolled out on our clusters to
>        offer newer features like FUSE fo our customers, but we're ran into a
>        couple of showstopper issues when deploying these kernels on busier
>        guests, showing a lot of errors like this:
> 
>      Which exact kernel versions are you using? From which kernel
>      tree/branch?
> 
>    The last we tried was 2.6.32.9 from [1]kernel.org. Had the same results
>    with [2]kernel.org 2.6.31.5.
>

OK. Are your guests 32bit or 64bit? 
 
I think 2.6.32.10 has the CONFIG_HIGHPTE fix.. so earlier versions will crash
if CONFIG_HIGHPTE is enabled for 32bit kernels.

>        in our hope to get rid of this issue we upgraded from Xen 3.3 to Xen
>        3.4.1.7 out of the gitco repos. The issue persisted. Is there a magic
>        version of Xen, preferably one that can be found in an rpm repository
>        for CentOS 5, that *does* properly support pvops kernels without these
>        issues?
> 
>      I've used Xen 3.4.2 and Xen 4.0.0 with pvops dom0 kernels.
>      pvops dom0 2.6.32 kernels _require_ Xen 4.0.0 or Xen 3.4.3.
> 
>    That's what I understood, too. But then I ran into this:
>      [root@sausage ~]# xm dmesg | grep Xen- | head -1
>      (XEN) ----[ Xen-3.3.1  x86_64  debug=n  Not tainted ]----
>      [root@sausage ~]# xm create -c vps3510
>      Using config file "/etc/xen/vps3510".
>      Started domain vps3510
>      Linux version 2.6.32.9xls-domU (root@pablo) (gcc version 4.3.3 (Ubuntu
>    4.3.3-5ubuntu4) ) #2 SMP Mon Apr 5 21:43:30 CEST 2010
>      (...)
>      CentOS release 5.4 (Final)
>      Kernel 2.6.32.9xls-domU on an x86_64
> 
>      [3]vps3510.xlshosting.net login:
>    Am I going mad? This is a vanilla kernel.

No, you're not mad.
pvops *dom0* 2.6.32 kernels require Xen 3.4.3 or Xen 4.0.0.

Vanilla pvops domU kernels from kernel.org don't require any specific new Xen 
version.


>    Are there any reliable RPM sources for 3.4.2?
> 

Gitco has Xen 3.4.2 rpms.

-- Pasi


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