From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757855Ab1JEGjN (ORCPT ); Wed, 5 Oct 2011 02:39:13 -0400 Received: from mx1.redhat.com ([209.132.183.28]:23988 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756193Ab1JEGjM (ORCPT ); Wed, 5 Oct 2011 02:39:12 -0400 Date: Wed, 5 Oct 2011 08:39:45 -0200 From: "Michael S. Tsirkin" To: Rusty Russell Cc: Pawel Moll , "linux-kernel@vger.kernel.org" , "virtualization@lists.linux-foundation.org" , "linux-arm-kernel@lists.infradead.org" , "peter.maydell@linaro.org" , Anthony Liguori Subject: Re: [PATCH] virtio: Add platform bus driver for memory mapped virtio device Message-ID: <20111005103944.GB5587@redhat.com> References: <1317217663-32647-1-git-send-email-pawel.moll@arm.com> <878vp1iqpz.fsf@rustcorp.com.au> <1317745002.3158.340.camel@hornet.cambridge.arm.com> <87aa9ggs4k.fsf@rustcorp.com.au> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <87aa9ggs4k.fsf@rustcorp.com.au> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 :)