Re: [Xen-users] Crash with XEN 4.0 on Suse 11.3

[Mark Pryor <tlviewer@xxxxxxxxx>]

--- On Sun, 12/12/10, JP P <storm66@xxxxxxxxxxxxxxxx> wrote:

> From: JP P <storm66@xxxxxxxxxxxxxxxx>
> Subject: [Xen-users] Crash with XEN 4.0 on Suse 11.3
> To: xen-users@xxxxxxxxxxxxxxxxxxx
> Date: Sunday, December 12, 2010, 11:39 AM
> Hello,
> 
> I get a VM crash while trying to load a database.

> Database VM
> Ram    2Gb 
> vcpu     1
> DIsks    3 virtual disks (system, data, log)
> accessed as hda/hdb/hdc.
> System Centos 5.5 with 2.6.18-194.26.1.el5 kernel
> 

Tell us why you don't want a paravirtual VM. If you tried xen 4.0.1, you must 
have tried a pv VM. What goes wrong with that?

To convert the VM to paravirtual, use the kernel-xen in C5.5

You need at least 2 new modules in your initrd.img: xennet and xenblk

/sbin/mkinitrd --with=xennet --with=xenblk --without-dmraid -v -f 
/boot/initrd-$(uname -r).img $(uname -r)

If the above is awkward, before you install kernel-xen (xen aware kernel), make 
the following edit

#cat >> /etc/sysconfig/mkinitrd/pvxen<<EOL
with=xennet
with=xenblk
preload=xenblk
EOL

#chmod +x /etc/sysconfig/mkinitrd/pvxen

#yum install kernel-xen

then in your VM.cfg use bootloader=pygrub or copy the vmlinuz-xx.yy-el5xen and 
initrd-xx.yy-el5xen.img to dom0

This may not fix the crash, but performance should improve.

-- 
Mark






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