WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

Re: [Xen-devel] [PATCH] make shared_info architecture independent

To: "Yang, Xiaowei" <xiaowei.yang@xxxxxxxxx>, Keir Fraser <keir@xxxxxxxxxxxxx>, "He, Qing" <qing.he@xxxxxxxxx>
Subject: Re: [Xen-devel] [PATCH] make shared_info architecture independent
From: Keir Fraser <keir@xxxxxxxxxxxxx>
Date: Fri, 01 Dec 2006 09:14:40 +0000
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
Delivery-date: Fri, 01 Dec 2006 01:14:49 -0800
Envelope-to: www-data@xxxxxxxxxxxxxxxxxx
In-reply-to: <8C834404208B254EAD4E532C94859869056C23@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>
List-help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
List-post: <mailto:xen-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
Thread-index: AccVGu7nChRh+annQ3K+gw6B+Sr5ogABG3+CAAAMt9AAAmRjQg==
Thread-topic: [Xen-devel] [PATCH] make shared_info architecture independent
User-agent: Microsoft-Entourage/11.2.5.060620
On 1/12/06 08:17, "Yang, Xiaowei" <xiaowei.yang@xxxxxxxxx> wrote:

> I don't quite understand what "break ABI compatibility" mean? Doesn't it
> mean old domX kernel can't run with new HV or vice versa? Since we only
> made a small change to evtchn structure inside and exported APIs is
> untouched, we think it won't affect others.

Yes, that's precisely what ABI compatibility means. Your patch breaks it and
so is unacceptable.

Luckily Jan Beulich has done the hard work of supporting the current 32-bit
ABI on a 64-bit hypervisor. He did this primarily to support paravirtual PAE
guests on 64-bit hypervisor, but I'm sure the work can be (fairly) easily
extended to support 32-bit PV-on-HVM drivers on 64-bit hypervisor.

 -- Keir


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel

<Prev in Thread] Current Thread [Next in Thread>