From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from [140.186.70.92] (port=52268 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1PCrvM-0007Ge-Lw for qemu-devel@nongnu.org; Mon, 01 Nov 2010 06:47:39 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1PCrqw-0001Pm-7t for qemu-devel@nongnu.org; Mon, 01 Nov 2010 06:43:03 -0400 Received: from mx1.redhat.com ([209.132.183.28]:1027) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1PCrqw-0001P9-0n for qemu-devel@nongnu.org; Mon, 01 Nov 2010 06:43:02 -0400 Message-ID: <4CCE9989.2010809@redhat.com> Date: Mon, 01 Nov 2010 06:42:17 -0400 From: Avi Kivity MIME-Version: 1.0 Subject: Re: [Qemu-devel] Re: [PATCH] Implement a virtio GPU transport References: <4CAC9CD1.2050601@collabora.co.uk> <4CB1D79A.6070805@redhat.com> <4CBD739A.2010500@collabora.co.uk> <4CBD7560.6080207@redhat.com> <4CC8226F.5080807@collabora.co.uk> <4CC94203.1080207@redhat.com> <4CC9647A.50108@collabora.co.uk> <4CC98784.7020907@redhat.com> <4CC9D472.2080109@collabora.co.uk> In-Reply-To: <4CC9D472.2080109@collabora.co.uk> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Ian Molton Cc: virtualization@lists.osdl.org, linux-kernel@vger.kernel.org, QEMU Developers On 10/28/2010 03:52 PM, Ian Molton wrote: > On 28/10/10 15:24, Avi Kivity wrote: >>> The caller is intended to block as the host must perform GL rendering >>> before allowing the guests process to continue. >> >> Why is that? Can't we pipeline the process? > > No, not really. the guest may call for the scene to be rendered at any > time and we have to wait for that to happen before we can return the > data to it. Waiting for a response is fine, but can't the guest issue a second batch while waiting for the first? -- I have a truly marvellous patch that fixes the bug which this signature is too narrow to contain.