RE: [Xen-users] Re: Custom DomU kernel

["Petersson, Mats" <Mats.Petersson@xxxxxxx>]

 

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From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of BB Mailing list
Sent: 24 October 2006 16:01
To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] Re: Custom DomU kernel

Hi,

Thanks for the quick reply - what would a lot of hard work imply? Having this configuration and the RHAS image running was quite a lot of hard work as well, so I'm not scared :)  

 

Figuring out how to apply the patches developed by Xen for 2.6 onto a 2.4 kernel, and fix any problems that arise from the fact that the 2.4 kernel is different from 2.6, so you may need patches in different places than they are for 2.6. The xen 2.0 hypervisor has patches for Linux 2.4 kernels, so you may be able to get an idea of how it works from that - but the Xen 2.0 hypervisor is different from 3.0 in several aspects, which would mean that the patches need to be different - so if you compare the 3.0 patches for 2.6 and 2.0 patches for 2.6, you'd see how different (and I haven't done this) the patches are for the different Xen versions. Based on that, you should be able to determine what the work needed for 2.4 is... But since there hasn't been any announcement of such a patch being available, I suspect it's not trivial...

 

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Mats

Right - sounds like fun. What if I use Xen 2 on my 2.6 kernel in place of Xen 3? Would that even be possible? 

 

I guess that is a possibility - but you'll be missing some of the new features - which of course may be less important if you don't need any of them... :-)

 

Since I work on HVM, I sort of can't choose - it's 3.0.x that works, and nothing previously...

 

--

Mats

Quentin.

Okay, sounds like I got some options. What if I want to use HVM (which I never heard about before, sorry I am really not a hardware guy hehe) ? How can I make sure my hardware supports this? Do you have some pointers?  

 

 

 

<Advert> Buy some AMD Opteron in Socket F.

</Advert>
 

Otherwise, there are AMD Athlon64 and Intel processors available that support AMD-V and Intel VT respectively. For the AMD parts it's relatively easy: Don't buy a Sempron, and as long as it's got DDR2 memory interface, you'll have AMD-V. Apparently, the Intel story isn't so straight-forward, they have a number of conditions that all need to be fulfilled together, including the "right" BIOS and/or motherboard... 

 

--

Mats 
Thanks !

Quentin

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