From mboxrd@z Thu Jan  1 00:00:00 1970
From: Keir Fraser <keir.fraser@eu.citrix.com>
Subject: Re: Re: [PATCH] Support swap a page from user space tools
	-- Was RE: [RFC][PATCH] Basic support for page offline
Date: Thu, 19 Mar 2009 16:45:03 +0000
Message-ID: <C5E8270F.48DA%keir.fraser@eu.citrix.com>
References: <E2263E4A5B2284449EEBD0AAB751098401C7EC072A@PDSMSX501.ccr.corp.intel.com>
Mime-Version: 1.0
Content-Type: text/plain;
	charset="US-ASCII"
Content-Transfer-Encoding: 7bit
Return-path: <xen-devel-bounces@lists.xensource.com>
In-Reply-To: <E2263E4A5B2284449EEBD0AAB751098401C7EC072A@PDSMSX501.ccr.corp.intel.com>
List-Unsubscribe: <http://lists.xensource.com/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/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: "Jiang, Yunhong" <yunhong.jiang@intel.com>, Tim Deegan <Tim.Deegan@eu.citrix.com>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
List-Id: xen-devel@lists.xenproject.org

On 19/03/2009 14:42, "Jiang, Yunhong" <yunhong.jiang@intel.com> wrote:

>>> It is ok for us to use an arbitrary new mfn, and then do the update_entry.
>>> But what happen if this process failed and we want to turn back to the old
>>> page? We still need this mechanism at that situation.
>> 
>> If what failed? The update_entry? How could that happen?
> 
> Per discussion before, when the page is granted to other domain, then after we
> update all entry, there will still have reference to left.

Hmmm I don't really understand.

 K.