Re: [Xen-users] how to change guest OS kernel version from xen

[Martin Goldstone <m.j.goldstone@xxxxxxxxxxxxxxx>]

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I'd suggest you look at hardware virtualization (HVM), as then you'll be
able to use which ever kernel you need to use.  With a paravirtualized
guest, you can only use a kernel that's had the Xen patches applied, so
you won't be able to use a standard SMP kernel.  In order to do hardware
virtualization, you'll need a CPU that can handle it.  Google/Wikipedia
should be able to help you find one. If you cat /proc/cpuinfo and look
for VMX (Intel processors) or SVM (AMD processors), that will tell you
if you already have the capability for hardware virtualization.

tyowo kathy wrote:
> 
> Hi,Martin
> 
> Thanks a lot.
> My virtual platform sticks to Xen kernel.
> Because our development relates with kernel version, our virtual guest
> OS need smp kernel.
> Please see my vm configure file:
> disk = [ 'file:/var/lib/xen/images/vm1/hda,hda,w', 'phy:hde,hdb,r' ]
> memory = 256
> vcpus = 1
> builder = 'linux'
> kernel = '/tmp/YaST2-15684-Ng5sdV/vmlinuz-2.6.16.13-4-xen'
> ramdisk = '/tmp/YaST2-15684-Ng5sdV/inst-initrd'
> name = 'vm1'
> ip = '192.168.125.99'
> netmask = '255.255.255.0'
> gateway = '255.255.255.128'
> interface = 'eth0'
> vif = [ 'mac=00:16:3e:4e:e5:46' ]
> localtime = 0
> on_poweroff = 'destroy'
> on_reboot = 'destroy'
> on_crash = 'destroy'
> extra = 'install=hd:/dev/hdb TERM=xterm textmode=1 hostip=192.168.125.99
> netmask=255.255.255.0 gateway=255.255.255.128 netdevice=eth0'
> 
> 
> Question: how to modify "kernel" parameter to satisfy my demand that
> guest OS is smp?
> I have tried that modify kernel =
> '/tmp/YaST2-15684-Ng5sdV/vmlinuz-2.6.16.13-4-smp',
> But I doesn't work.
> 
> Kathy
> 
> 
> 
>> From: Martin Goldstone <m.j.goldstone@xxxxxxxxxxxxxxx>
>> To: tyowo kathy <brightgreen1@xxxxxxxxxxx>, 
>> xen-users@xxxxxxxxxxxxxxxxxxx
>> Subject: Re: [Xen-users] how to change guest OS kernel version from xen
>> Date: Thu, 05 Jul 2007 09:51:29 +0100
>>
> If you're guest is paravirtualized, then you'll need to stick to a Xen
> kernel.  A regular kernel (I assuming the one you're suggesting is a
> regular SMP kernel) will only work with a HVM guest, which obviously
> depends on suitable hardware.
> 
> Out of interest, why do you want to change the Kernel you're using?  I
> wouldn't imagine there's much difference between the one's your
> suggesting apart from the Xen patches.
> 
> Martin
> 
> tyowo kathy wrote:
>> hello, every one,
> 
>> My guest os's kernel version is suse10's kernel-2.6.13.4-xen.
>> Now, I want to change kernel version to kernel-2.6.13.4-smp.
>> what should I do? Need I modify vm machine configue ?
> 
> 
>> thanks a lot.
> 
> 
>> Kathy
> 
>> _________________________________________________________________
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> 
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