From mboxrd@z Thu Jan  1 00:00:00 1970
From: Olaf Hering <olaf@aepfle.de>
Subject: Re: [Planning for Xen-4.6] Migration v2
Date: Wed, 26 Nov 2014 15:53:30 +0100
Message-ID: <20141126145330.GA3623@aepfle.de>
References: <5474DE5A.2060000@citrix.com> <20141126080912.GA944@aepfle.de>
	<5475D302.3010409@citrix.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Return-path: <xen-devel-bounces@lists.xen.org>
Content-Disposition: inline
In-Reply-To: <5475D302.3010409@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: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: Juergen Gross <JGross@suse.com>, Wei Liu <wei.liu2@citrix.com>, Ian Campbell <Ian.Campbell@citrix.com>, Ian Jackson <Ian.Jackson@eu.citrix.com>, Tim Deegan <tim@xen.org>, Xen-devel List <xen-devel@lists.xen.org>, Ross Lagerwall <ross.lagerwall@citrix.com>, David Vrabel <david.vrabel@citrix.com>, Jan Beulich <JBeulich@suse.com>, Shriram Rajagopalan <rshriram@cs.ubc.ca>, Hongyang Yang <yanghy@cn.fujitsu.com>
List-Id: xen-devel@lists.xenproject.org

On Wed, Nov 26, Andrew Cooper wrote:

> It is certainly my hope going forward that different knobs can be
> exposed.  One thing I think would be interesting is some proper
> calculations of the delta in the dirty set, and offering a threshold
> which chooses between "pause and complete" or "abort the migration and
> complain that the VM is too active"

The "pause and complete" step is what causes unexpected time jumps in
the guest. Would be nice if that can be controlled with a knob.

Olaf