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

[Xen-devel] Re: Xend transaction reduction breaks migration

To: "Daniel P. Berrange" <berrange@xxxxxxxxxx>
Subject: [Xen-devel] Re: Xend transaction reduction breaks migration
From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Date: Thu, 15 Nov 2007 18:46:19 +0000
Cc: xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
Delivery-date: Thu, 15 Nov 2007 10:47:16 -0800
Envelope-to: www-data@xxxxxxxxxxxxxxxxxx
In-reply-to: <20071115183920.GC16499@xxxxxxxxxx>
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: Acgnt89FDYp0uJOrEdy0XAAX8io7RQ==
Thread-topic: Xend transaction reduction breaks migration
User-agent: Microsoft-Entourage/11.3.6.070618
On 15/11/07 18:39, "Daniel P. Berrange" <berrange@xxxxxxxxxx> wrote:

>> Any idea how your patch could cause this rather bizarre behaviour? I haven't
>> worked it out myself, though I'm 99% sure it *is* that changeset that has
>> caused this regression (based on tests with the changeset reverted).
> 
> Basically, instead of doing many small transactions, my change made some stuff
> all happen in one large transaction. Oddly though, I tried to be careful so
> that I only changed the codepath for the 'xm list' operation (well the SEXPR
> call to the list operation). Other operations like create, save, restore
> ought to be left using fine grained transactions as before.

I'll have another look at nearby changesets in xen-unstable then. Yours
doesn't really look all that likely to cause this problem, except that the
empirical evidence does point at it.

 -- Keir



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