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[Xen-users] Re: Xen is a feature

To: George Dunlap <george.dunlap@xxxxxxxxxxxxx>
Subject: [Xen-users] Re: Xen is a feature
From: "Chris Friesen" <cfriesen@xxxxxxxxxx>
Date: Thu, 04 Jun 2009 09:31:56 -0600
Cc: "jeremy@xxxxxxxx" <jeremy@xxxxxxxx>, Frans Pop <elendil@xxxxxxxxx>, Keir Fraser <Keir.Fraser@xxxxxxxxxxxxx>, "jens.axboe@xxxxxxxxxx" <jens.axboe@xxxxxxxxxx>, "tglx@xxxxxxxxxxxxx" <tglx@xxxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, "kurt.hackel@xxxxxxxxxx" <kurt.hackel@xxxxxxxxxx>, "x86@xxxxxxxxxx" <x86@xxxxxxxxxx>, Stephen Spector <stephen.spector@xxxxxxxxxx>, "avi@xxxxxxxxxx" <avi@xxxxxxxxxx>, "mingo@xxxxxxx" <mingo@xxxxxxx>, Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>, "wimcoekaerts@xxxxxxxxxxxx" <wimcoekaerts@xxxxxxxxxxxx>, Ian Pratt <Ian.Pratt@xxxxxxxxxxxxx>, ksrinivasan <ksrinivasan@xxxxxxxxxx>, Bill Davidsen <davidsen@xxxxxxx>, "xen-users@xxxxxxxxxxxxxxxxxxx" <xen-users@xxxxxxxxxxxxxxxxxxx>, "gregkh@xxxxxxx" <gregkh@xxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>, "EAnderson@xxxxxxxxxx" <EAnderson@xxxxxxxxxx>, "torvalds@xxxxxxxxxxxxxxxxxxxx" <torvalds@xxxxxxxxxxxxxxxxxxxx>, "davem@xxxxxxxxxxxxx" <davem@xxxxxxxxxxxxx>
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George Dunlap wrote:
> Frans Pop wrote:
> 
>>! The kernel policy always was and still is to accept only those
>>! features which have a technical benefit **to the code base**.

> If (hypothetically) we merged Xen into Linux, then (people are 
> suggesting) the coolness of Xen would actually contribute to the 
> coolness of Linux ("add technical benefit to the code base").  People 
> would feel like working on the interface between linux-xen and the rest 
> of linux would be making their own piece of software, Linux, work 
> better, rather than feeling like they have to work with some foreign 
> project that doesn't make their code any cooler.

I suspect that there is an element of this.

There is also the factor that if Xen was merged into linux, we would
then be able to work towards a sane(r) virtualization layer that would
be useful for KVM, Xen, and possibly others.  This provides a technical
benefit to the code base by introducing a more logical organization
rather than having ad-hoc changes sprinkled all over.

Chris


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