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Re: [Xen-users] who comes from kvm?

To: Steve Sapovits <steves06@xxxxxxxxxxx>
Subject: Re: [Xen-users] who comes from kvm?
From: Javier Guerra Giraldez <javier@xxxxxxxxxxx>
Date: Fri, 11 Feb 2011 22:34:47 -0500
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On Fri, Feb 11, 2011 at 12:24 PM, Steve Sapovits <steves06@xxxxxxxxxxx> wrote:
> (Xen is a type 1, KVM is a type 2)

that's not exact since KVM doesn't run 'on top of' the Linux kernel;
it's part of the Linux kernel.  as such, it has the same 'bare metal'
access to hardware as the rest of the kernel or the Xen hypervisor.

IMHO, the main difference is that Xen has its own scheduler and
arbitration logic, while KVM reuses existing Linux code.  pro: it can
be tuned to the specific case of handling VMs.  con: a little
duplication of code


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