From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Randy McAnally" <rsm@fast-serv.com>
Subject: Re: Massive problems with 'PCI-DMA: Out of SW-IOMMU space
	for XXX bytes [..]' with 3Ware controller
Date: Mon, 28 Jan 2008 10:03:05 -0500
Message-ID: <20080128150018.M59972@fast-serv.com>
References: <mailman.0.1201532315.19572.xen-devel@lists.xensource.com>
Mime-Version: 1.0
Content-Type: text/plain;
	charset=iso-8859-1
Return-path: <xen-devel-bounces@lists.xensource.com>
In-Reply-To: <mailman.0.1201532315.19572.xen-devel@lists.xensource.com>
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: 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)

Me too as well...any progress on this issue?

I notice that IO performance is notably slower than the stock RHEL kernel; 
about 1/2 overall write performance.  I can trigger the bug using DD or by 
copying disk images around.  All versions of Xen 3.1.x and 3.2.x are 
affected.

-- 
Randy McAnally
Fast Serv Networks, LLC
619-819-8252 x201
619-819-9443 fax