linux-kernel - Re: [PATCH 3/5] vhost: support upto 509 memory regions

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Message-ID: <5581A281.4000308@redhat.com>
Date:	Wed, 17 Jun 2015 18:38:25 +0200
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	"Michael S. Tsirkin" <mst@...hat.com>
CC:	Igor Mammedov <imammedo@...hat.com>, linux-kernel@...r.kernel.org,
	kvm@...r.kernel.org
Subject: Re: [PATCH 3/5] vhost: support upto 509 memory regions



On 17/06/2015 18:34, Michael S. Tsirkin wrote:
> On Wed, Jun 17, 2015 at 06:31:32PM +0200, Paolo Bonzini wrote:
>>
>>
>> On 17/06/2015 18:30, Michael S. Tsirkin wrote:
>>> Meanwhile old tools are vulnerable to OOM attacks.
>>
>> For each vhost device there will be likely one tap interface, and I
>> suspect that it takes way, way more than 16KB of memory.
> 
> That's not true. We have a vhost device per queue, all queues
> are part of a single tap device.

s/tap/VCPU/ then.  A KVM VCPU also takes more than 16KB of memory.

Paolo
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