linux-kernel - Re: [QUERY] lguest64

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Message-ID: <CAFLxGvxbYo+6nHThM70UuohA7dM+myJsF5FXcg_eS4S7-8AzVQ@mail.gmail.com>
Date:	Fri, 19 Jul 2013 22:36:33 +0200
From:	richard -rw- weinberger <richard.weinberger@...il.com>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Ramkumar Ramachandra <artagnon@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Rusty Russell <rusty@...tcorp.com.au>
Subject: Re: [QUERY] lguest64

On Fri, Jul 19, 2013 at 8:46 PM, H. Peter Anvin <hpa@...or.com> wrote:
> On 07/19/2013 10:42 AM, Ramkumar Ramachandra wrote:
>> H. Peter Anvin wrote:
>>> We want to reduce pvops and pvops users, not increase them...
>>
>> I see.  So the future is true virtualization which exposes the
>> underlying hardware, like KVM?  Why do bare-metal virtualizers like
>> Xen employ paravirtualization?  Also, where does UML stand?

UML is a nice thingy because it is Linux ported to itself, but it has
limitations.
Mostly it's speed (pagefaults and system calls are really slow) and it
supports only x86/x86_64.

I use UML on systems where KVM is not available.

--
Thanks,
//richard
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