Re: [Xen-devel] Reporting some xen 4.1.2* and 4.0 issues like limitations to 4 VCPUs for debian squeeze HVMs etc

[Mark Schneider <ms@xxxxxxxxxxxxxxxxxxxxxx>]

Thanks a lot for your answer Pasi.

Am 09.08.2011 02:55, schrieb Pasi Kärkkäinen:
> On Tue, Aug 09, 2011 at 01:26:44AM +0200, Mark Schneider wrote:
>    
> > Issue 1: 4 VCPUs limitation for squeeze?
> > # ---
> > <ironm>  pasik, my problem was/is that HVM images for squeeze and wheezy
> > created on xen 4.0 for some reason didn't boot on xen 4.1.2* ..
> > <ironm>  pasik, when I create HVM images on xen 4.1.2* they can boot
> > correctly .. however with some limitations for squeeze (not more than
> > 4VCPUs )
> > <pasik>  ironm: do the images made on 4.0 boot properly on 4.1.2 if you
> > have only 1 vcpu and say, 1 GB of mem?
> > <ironm>  pasik, I had to install again . and this squeeze images boots
> > now with 8GB RAM / 4cores
> > <ironm>  pasik, I made tests with 1 core / 1 GB, 2 cores / 2GB and 4
> > cores / 8GB .. they worked
> > <ironm>  8cores / 4 or 8 GB didn't work for squeeze
> >
> > The error looks like:
> > http://www.it-infrastrukturen.com/fileadmin/linux/paste/squeeze/squeeze-xen4.1.2-issue-install-menu-pic1.png
> > http://www.it-infrastrukturen.com/fileadmin/linux/paste/squeeze/squeeze-xen4.1.2-issue-error-pic2.png
> >      
> So based on the "squeeze-xen4.1.2-issue-error-pic2.png" I recommend you to 
> enable debugging options for the kernel, from the boot menu.
>
> Add at least "nomodeset initcall_debug debug loglevel=10"
> Then paste/capture the output.
>
> Some questions:
>         - That "BUG: soft lockup - CPU#0 stuck for 61s!" only happens when you 
> have 8 vcpus, right?
>    
It happens when I use 8 VCPUs. Please check the attached 
"BUG_soft_lockup-CPU_No_X.png"
There are more messages from CPU#0, 1, 5, 7. I have attached also the 
kernel 3.0.1 kernel config.
I will repeat this test on another DL385g7 server in case this one has 
hardware troubles.
>         - What if you install with 1 vcpu, then after installation install the 
> latest debian updates (new kernel),
>           and then try using 8 vcpus with the updated debian kernel?
>    
I have still to execute such test with 8 cores after updating kernel 
after installation (time issue yet). Until now the server booted 
correctly with 4 cores.

> > Config files are like:
> > http://www.it-infrastrukturen.com/fileadmin/linux/paste/HVM/hvm-squeeze.born2b3.net.cfg
> >      
> Looks OK.
>
>    
> > http://www.it-infrastrukturen.com/fileadmin/linux/paste/HVM/hvm-wheezy.born2b3.net.cfg
> >      
> For what is this wheezy cfgfile?
>    
Just only to check that this config is so far correct for wheezy tests.


> > Issue 2: problem with too big install image size? (DVD images)
> > <ironm>  maybe there is a problem when using DVD.iso images for
> > installations .. (no problem with CD size )
> > <ironm>  big size images (like DVD) or just the content (missing grub
> > packages on them) causes install errors in HVMs
> >
> > The error looks like:
> > http://www.it-infrastrukturen.com/fileadmin/linux/paste/wheezy/vxda-setting3-grub-error.png
> >      
> So are you saying you only get that GRUB error when installing from DVD.iso,
> but if you install from CD.iso GRUB installs ok ? do other deb packages install 
> OK?
>
> Is DVD/CD iso image the only difference? Are you sure the checksums of the iso 
> images are OK?
>    
md5sums of all .iso images are the same compare to ones on debian server:
root@xen411dom0:/ftp# md5sum -b debian-6.0.2.1-amd64-DVD-1.iso
b9b401989a84d751f5ec7e37cf2d825c *debian-6.0.2.1-amd64-DVD-1.iso

root@xen411dom0:/etc/xen# md5sum -b /ftp/debian-testing-amd64-DVD-1.iso
80473b659aae8269c81d4c50bdb63fe0 */ftp/debian-testing-amd64-DVD-1.iso

# md5sum from debian.org (below)
b9b401989a84d751f5ec7e37cf2d825c  debian-6.0.2.1-amd64-DVD-1.iso
80473b659aae8269c81d4c50bdb63fe0  debian-testing-amd64-DVD-1.iso

It looks like the wheezy testing DVD image misses the grub package (s. 
last lines in link  / below)
http://www.it-infrastrukturen.com/fileadmin/linux/paste/wheezy/syslog
# ---

Aug  6 19:23:58 in-target: E
Aug  6 19:23:58 in-target: : Paket grub-common kann nicht gefunden werden
Aug  6 19:23:58 grub-installer: info: Identified partition label for 
/dev/xvda1: msdos
Aug  6 19:23:59 grub-installer: dpkg: warning: ignoring request to remove grub 
which isn't installed.
Aug  6 19:23:59 grub-installer: dpkg: warning: ignoring request to remove 
grub-legacy which isn't installed.
Aug  6 19:24:00 in-target: Paketlisten werden gelesen...

Aug  6 19:24:00 in-target: Statusinformationen werden eingelesen...
Aug  6 19:24:00 in-target: E: Paket »grub-pc« hat keinen 
Installationskandidaten
Aug  6 19:24:00 grub-installer: info: Calling 'apt-install grub-pc' failed

# ---

> > Issues 3+: different errors in log files of xen 4.1.2*
> > http://www.it-infrastrukturen.com/fileadmin/linux/paste/wheezy/xen4.1.2-kernel3final/qemu-dm-squeezehvm.born2b3.net.log-xen412-k3.txt
> > http://www.it-infrastrukturen.com/fileadmin/linux/paste/wheezy/xen4.1.2-kernel3final/qemu-dm-wheezyhvm.born2b3.net.log-xen412-k3.tx
> > http://www.it-infrastrukturen.com/fileadmin/linux/paste/wheezy/xen4.1.2-kernel3final/xen-hotplug.log-xen412-k3.txt
> > http://www.it-infrastrukturen.com/fileadmin/linux/paste/wheezy/xen4.1.2-kernel3final/xend-debug.log-xen412-k3.txt
> > http://www.it-infrastrukturen.com/fileadmin/linux/paste/wheezy/xen4.1.2-kernel3final/xend.log-xen412-k3.txt
> > http://www.it-infrastrukturen.com/fileadmin/linux/paste/wheezy/xen4.1.2-kernel3final/xm_dmesg-xen412-k3.txt
> > http://www.it-infrastrukturen.com/fileadmin/linux/paste/wheezy/xen4.1.2-kernel3final/xm_info-xen412-k3.txt
> >      
> What exactly is the issue here? What problem are you having?
>    
Many entries in log files I am wondering about .. some examples:

# ---

cat: /sys/bus/scsi/devices/host0/vendor: No such file or directory
cat: /sys/bus/scsi/devices/host0/model: No such file or directory
cat: /sys/bus/scsi/devices/host0/type: No such file or directory
cat: /sys/bus/scsi/devices/host0/rev: No such file or directory
.
# ---

# ---

[2011-08-07 10:42:47 2902] WARNING (XendAPI:708) API call: VBD.set_device not 
found
[2011-08-07 10:42:47 2902] WARNING (XendAPI:708) API call: VBD.set_type not 
found
[2011-08-07 10:42:47 2902] WARNING (XendAPI:708) API call: 
session.get_all_records not found
[2011-08-07 10:42:47 2902] WARNING (XendAPI:708) API call: event.get_record not 
found
[2011-08-07 10:42:47 2902] WARNING (XendAPI:708) API call: event.get_all not 
found
[2011-08-07 10:42:47 2902] WARNING (XendAPI:708) API call: VIF.set_device not 
found
[2011-08-07 10:42:47 2902] WARNING (XendAPI:708) API call: VIF.set_MAC not found
[2011-08-07 10:42:47 2902] WARNING (XendAPI:708) API call: VIF.set_MTU not found
[2011-08-07 10:42:47 2902] WARNING (XendAPI:708) API call: debug.get_all not 
found

# ---

# ---

(XEN) traps.c:2430:d0 Domain attempted WRMSR 00000000c0010000 from 
0x0000000000430076 to 0x0000000000530076.
(XEN) printk: 4028 messages suppressed.
(XEN) traps.c:2430:d0 Domain attempted WRMSR 00000000c0010000 from 
0x0000000000430076 to 0x0000000000030076.

# ---

Thank you / regards, Mark

> -- Pasi
>
>
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>    

--
ms@xxxxxxxxxxxxxxxxxxxxxx

+++ Free infrastructure software for all. +++

Attachment: config-3.0.1.gz
Description: application/gzip

Attachment: BUG_soft_lockup-CPU_No_X.png
Description: PNG image

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