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From: Bryan Donlan <bdonlan@gmail.com>
Date: Fri, 8 Jan 2010 14:30:55 -0500
Message-ID: <3e8340491001081130v2adb8e07k3b32f7f860daf603@mail.gmail.com>
Subject: Re: [PATCH v3 00/12] KVM: Add host swap event notifications for PV 
	guest
To: Rik van Riel <riel@redhat.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>, Gleb Natapov <gleb@redhat.com>,
       kvm@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org,
       avi@redhat.com, mingo@elte.hu, a.p.zijlstra@chello.nl,
       tglx@linutronix.de, hpa@zytor.com, cl@linux-foundation.org
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On Fri, Jan 8, 2010 at 2:24 PM, Rik van Riel <riel@redhat.com> wrote:
> On 01/08/2010 11:18 AM, Marcelo Tosatti wrote:
>
>> - Limit the number of queued async pf's per guest ?
>
> This is automatically limited to the number of processes
> running in a guest :)

Only if the guest is nice and plays by the rules. What is to stop a
malicious guest from just immediately switching back to userspace and
kicking off another page-in every time it gets an async PF?
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