From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1Nujga-0003zP-PZ for qemu-devel@nongnu.org; Thu, 25 Mar 2010 05:49:08 -0400 Received: from [140.186.70.92] (port=49862 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1NujgZ-0003z1-LY for qemu-devel@nongnu.org; Thu, 25 Mar 2010 05:49:08 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1NujgY-00030B-Ek for qemu-devel@nongnu.org; Thu, 25 Mar 2010 05:49:07 -0400 Received: from mx1.redhat.com ([209.132.183.28]:45901) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1NujgY-000303-7F for qemu-devel@nongnu.org; Thu, 25 Mar 2010 05:49:06 -0400 Date: Thu, 25 Mar 2010 11:44:48 +0200 From: "Michael S. Tsirkin" Message-ID: <20100325094448.GA15306@redhat.com> References: <1269497376-21903-1-git-send-email-cam@cs.ualberta.ca> <20100325091552.GB11153@redhat.com> <4BAB2F79.7030706@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4BAB2F79.7030706@redhat.com> Subject: [Qemu-devel] Re: [PATCH v3 1/1] Shared memory uio_pci driver List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Avi Kivity Cc: Cam Macdonell , qemu-devel@nongnu.org, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org On Thu, Mar 25, 2010 at 11:40:09AM +0200, Avi Kivity wrote: > On 03/25/2010 11:15 AM, Michael S. Tsirkin wrote: >> >> - Why are you using 32 bit long memory accesses for interrupts? >> 16 bit IO eould be enough and it's faster. This what virtio-pci does. >> >> > > Why is 16 bit io faster? Something to do with need for emulation to get address/data for pci memory accesses? > -- > error compiling committee.c: too many arguments to function