linux-kernel - Re: [PATCH 0/3] KVM: VMX: fix handling inv{ept,vpid} and nested RHEL6 KVM

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Message-ID: <56ED2196.8030908@redhat.com>
Date:	Sat, 19 Mar 2016 10:53:26 +0100
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	David Matlack <dmatlack@...gle.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	kvm list <kvm@...r.kernel.org>, jmontleo@...hat.com,
	bdas@...hat.com
Subject: Re: [PATCH 0/3] KVM: VMX: fix handling inv{ept,vpid} and nested RHEL6
 KVM



On 18/03/2016 19:04, David Matlack wrote:
> > the tests would effectively DoS the host.
>
> How does this DoS the host? The guest is stuck executing the same
> instruction over and over, but it's exiting to KVM every time,
> allowing KVM to reschedule the VCPU. I would agree it DoSes the guest.

You're right, these tests are safe.

Paolo