From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mta5.srv.hcvlny.cv.net ([167.206.4.200]:45801 "EHLO mta5.srv.hcvlny.cv.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751493Ab0FWMnS (ORCPT ); Wed, 23 Jun 2010 08:43:18 -0400 Received: from TheShoveller.local (ool-18bfe0d5.dyn.optonline.net [24.191.224.213]) by mta5.srv.hcvlny.cv.net (Sun Java System Messaging Server 6.2-8.04 (built Feb 28 2007)) with ESMTP id <0L4G00B3VWO5MXY0@mta5.srv.hcvlny.cv.net> for linux-media@vger.kernel.org; Wed, 23 Jun 2010 08:43:17 -0400 (EDT) Date: Wed, 23 Jun 2010 08:43:17 -0400 From: Steven Toth Subject: Re: buffer management In-reply-to: To: Manu Abraham Cc: Linux Media Mailing List Message-id: <4C220165.50809@kernellabs.com> MIME-version: 1.0 Content-type: text/plain; charset=ISO-8859-1; format=flowed Content-transfer-encoding: 7BIT References: Sender: linux-media-owner@vger.kernel.org List-ID: > Now, on each video interrupt, I know which SG list i need to read > from. At this stage i do need to copy the > buffers associated with each of the SG lists at once. In this > scenario, I don't see how videobuf could be used, > while I keep getting this feeling that a simple copy_to_user of the > entire buffer could do the whole job in a > better way, since the buffers themselves are already managed and > initialized already. Am I correct in thinking > so, or is it that I am overlooking something ? Manu, SAA7164 suffers from this. If you find a solution I'd love to hear it. Regards, - Steve -- Steven Toth - Kernel Labs http://www.kernellabs.com