From mboxrd@z Thu Jan  1 00:00:00 1970
From: Gordan Bobic <gordan@bobich.net>
Subject: Re: GPU passthrough issue when VM is configured with 4G
 memory
Date: Mon, 20 May 2013 19:43:09 +0100
Message-ID: <519A6EBD.9040104@bobich.net>
References: <FAB5C136CA8BEA4DBEA2F641E3F536384A8A67D5@szxeml538-mbx.china.huawei.com>
	<513868F0.6020104@eu.citrix.com>
	<FAB5C136CA8BEA4DBEA2F641E3F536384A8ABBAA@szxeml538-mbx.china.huawei.com>
	<CAFLBxZaWLsc2X6UD_ZQC-aM0Bgn+JUd+Xsr7FS+32bN+-5TQUQ@mail.gmail.com>
	<FAB5C136CA8BEA4DBEA2F641E3F536384A8AF95F@szxeml538-mbx.china.huawei.com>
	<alpine.DEB.2.02.1303181159230.4716@kaball.uk.xensource.com>
	<FAB5C136CA8BEA4DBEA2F641E3F536384A8BE27C@szxeml538-mbx.china.huawei.com>
	<FAB5C136CA8BEA4DBEA2F641E3F536384A907048@szxeml538-mbx.china.huawei.com>
	<CAFLBxZazpFSaXiWaBmsTaHeQNxSt9GL-Mb0ONJkXMOxQg8uECQ@mail.gmail.com>
	<FAB5C136CA8BEA4DBEA2F641E3F536384A908433@szxeml538-mbx.china.huawei.com>
	<20130509164944.GR11427@reaktio.net>
	<FAB5C136CA8BEA4DBEA2F641E3F5363860A37EB0@szxeml538-mbs.china.huawei.com>
	<519A091C.10507@eu.citrix.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"; Format="flowed"
Content-Transfer-Encoding: 7bit
Return-path: <xen-devel-bounces@lists.xen.org>
In-Reply-To: <519A091C.10507@eu.citrix.com>
List-Unsubscribe: <http://lists.xen.org/cgi-bin/mailman/options/xen-devel>,
	<mailto:xen-devel-request@lists.xen.org?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xen.org>
List-Help: <mailto:xen-devel-request@lists.xen.org?subject=help>
List-Subscribe: <http://lists.xen.org/cgi-bin/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xen.org?subject=subscribe>
Sender: xen-devel-bounces@lists.xen.org
Errors-To: xen-devel-bounces@lists.xen.org
To: George Dunlap <george.dunlap@eu.citrix.com>
Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com>, "xudong.hao@intel.com" <xudong.hao@intel.com>, Yanqiangjun <yanqiangjun@huawei.com>, Luonengjun <luonengjun@huawei.com>, Wangzhenguo <wangzhenguo@huawei.com>, Yangxiaowei <xiaowei.yang@huawei.com>, "Gonglei (Arei)" <arei.gonglei@huawei.com>, Anthony Perard <anthony.perard@citrix.com>, "xen-devel@lists.xen.org" <xen-devel@lists.xen.org>, Hanweidong <hanweidong@huawei.com>, "xiantao.zhang@intel.com" <xiantao.zhang@intel.com>
List-Id: xen-devel@lists.xenproject.org

I'd also like to stress this is not only an issue for > 4GB of RAM in 
domU - I am seeing the issue with > 2GB of RAM in domU.

Gordan

On 05/20/2013 12:29 PM, George Dunlap wrote:
> On 17/05/13 08:10, Hanweidong wrote:
>> Actually, it's not really related to GPU passthrough. You can
>> reproduce it when a VM has a big pci hole size (such as 512MB), e.g.
>> create a VM with a virtual device which has a 512MB pci BAR.
>
> It seems like this is probably an artchitectural thing that will require
> someone familiar with qemu to sort out.  Anthony and Stefano, could one
> of you two step up to getting it sorted by 4.3?
>
>   -George
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xen.org
> http://lists.xen.org/xen-devel