RE: [Xen-devel] Re: Getting rid of xenbus_suspend(): tpmfrontdri

To:	"Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx>, "Stefan Berger" <stefanb@xxxxxxxxxx>
Subject:	RE: [Xen-devel] Re: Getting rid of xenbus_suspend(): tpmfrontdriver impacted?
From:	"Tian, Kevin" <kevin.tian@xxxxxxxxx>
Date:	Mon, 6 Nov 2006 21:15:34 +0800
Cc:	xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, "Zhai, Edwin" <edwin.zhai@xxxxxxxxx>, xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
Delivery-date:	Mon, 06 Nov 2006 07:24:48 -0800
Envelope-to:	www-data@xxxxxxxxxxxxxxxxxx
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:	AccBBEVyhCn6Gmz3EdutFQANk04WTAAdBHhgAAIdkXkACQBuEA==
Thread-topic:	[Xen-devel] Re: Getting rid of xenbus_suspend(): tpmfrontdriver impacted?

>From: Keir Fraser [mailto:Keir.Fraser@xxxxxxxxxxxx]
>Sent: 2006年11月6日 16:52
>
>No, there would still be a connection through to the xenstored. I guess
>we
>do take a few mutexes and so on, so we would need a bit of undo code.
>So
>xenbus_suspend_cancel() is probably the way to go. But full
>re-connection is
>not required.
>
> -- Keir

For the migration case, the connection may still exist to the xenstored. 
However for save/restore case, we destroy the domain once saved, 
right? In that case, the connection is broken and next time you still 
need to re-bind inter-domain xenbus channel (although local event 
port is same) after resume, just like what's done for xenconsole. 
Xenbus_suspend_cancel can save local state resume, but inter-
domain re-connection is inevitable, IMO. :-)

Thanks,
Kevin

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

WARNING - OLD ARCHIVES

xen-devel

RE: [Xen-devel] Re: Getting rid of xenbus_suspend(): tpmfrontdriver impa