From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Muench Subject: Re: [ivtv-devel] Problems loading ivtv in Xen - DMA issues? Date: Thu, 7 Jul 2005 13:34:06 -0400 Message-ID: References: <1120750950.1556.24.camel@mud> <5c8bdef6ff868881d1a1e3bc0a79a906@cl.cam.ac.uk> Reply-To: David Muench Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <5c8bdef6ff868881d1a1e3bc0a79a906@cl.cam.ac.uk> Content-Disposition: inline List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Keir Fraser Cc: ivtv-devel@lists.sourceforge.net, xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org On 7/7/05, Keir Fraser wrote: >=20 > On 7 Jul 2005, at 17:07, David Muench wrote: >=20 > > I recieved this reply to my request for help with ivtv on Xen on the > > ivtv-devel list. I don't feel very well qualified to respond to > > Andrew. Can I ask what your thoughts are? Am I just out of luck? >=20 > Andrew's simply pointing out that the ivtv driver already uses the > dma-mapping interface properly. It's good to have that confirmed. :-) >=20 > However, looking back at XenLinux's implementation of > {dma,pci}_map_single, it is broken for multi-page buffers. It's > surprising noone has hit a problem before now, but most devices other > than video-capture cards you deal with only up to a page at a time. >=20 > So this is a Xen bug: I'll find some time to fix this and get back to > you. Are you using Xen 2.0 or 3.0 (unstable)? That's great news, I thought I was up a creek. I'm using 2.0.6. Thanks again, I really appreciate your help. Dave --=20 David Muench - davemuench@gmail.com Jabber ID: dave@jabber.wasteland.org