linux-kernel - Re: [PATCH] virtio: Add platform bus driver for memory mapped virtio device

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Message-ID: <20111005103944.GB5587@redhat.com>
Date:	Wed, 5 Oct 2011 08:39:45 -0200
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	Rusty Russell <rusty@...tcorp.com.au>
Cc:	Pawel Moll <pawel.moll@....com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"virtualization@...ts.linux-foundation.org" 
	<virtualization@...ts.linux-foundation.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"peter.maydell@...aro.org" <peter.maydell@...aro.org>,
	Anthony Liguori <aliguori@...ibm.com>
Subject: Re: [PATCH] virtio: Add platform bus driver for memory mapped virtio
 device

On Wed, Oct 05, 2011 at 11:40:51AM +1030, Rusty Russell wrote:
> The absolute maximum is a ring of 32k elements, which is about 850k.
> That seems a little excessive, though.

Given that it must be physically contigious and each descriptor
is 64 byte in size + space for used and avail rings, yes it does :)

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