From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Christopher S. Aker" <caker@theshore.net>
Subject: Re: Massive problems with 'PCI-DMA: Out of SW-IOMMU space
	for XXX bytes [..]' with 3Ware controller
Date: Mon, 26 Nov 2007 11:12:05 -0500
Message-ID: <474AF055.30509@theshore.net>
References: <fic6cm$9ms$1@ger.gmane.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Return-path: <xen-devel-bounces@lists.xensource.com>
In-Reply-To: <fic6cm$9ms$1@ger.gmane.org>
List-Unsubscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xensource.com>
List-Help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-Subscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
Sender: xen-devel-bounces@lists.xensource.com
Errors-To: xen-devel-bounces@lists.xensource.com
To: Markus Schuster <ma.schuster@gmx.de>
Cc: xen-devel@lists.xensource.com
List-Id: xen-devel@lists.xenproject.org

Markus Schuster wrote:
> PCI-DMA: Out of SW-IOMMU space for 40960 bytes at device 0000:03:00.0
> 3w-9xxx: scsi0: ERROR: (0x06:0x001C): Failed to map scatter gather list.
> (03:00.0 is the 3Ware Controller)

Here's my "me too" data point.

I'm also seeing this on Xen 3.1.2, 64bit Xen, PAE Dom0 (2.6.18).  For 
me, it only happens if Dom0 is low on memory and into swap quite a bit. 
  Compiling a kernel with -j4 or so, with only 256M allocated to Dom0 
will trigger it.  I tried a number of swiotlb settings, none eliminate 
the problem.

-Chris