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] [RFC] Physical hot-add cpus and TSC

To: "Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx>, Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>, "Xen-Devel (xen-devel@xxxxxxxxxxxxxxxxxxx)" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Ian Pratt <Ian.Pratt@xxxxxxxxxxxxx>
Subject: Re: [Xen-devel] [RFC] Physical hot-add cpus and TSC
From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date: Fri, 28 May 2010 08:03:42 +0100
Cc:
Delivery-date: Fri, 28 May 2010 00:04:41 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <789F9655DD1B8F43B48D77C5D30659731E78D90A@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/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
Thread-index: Acr9rpJYA+BrOykCR6yHgEJ6dUO4GgAZaAKgAAVEYmoAAJQ2UAACFMaZ
Thread-topic: [Xen-devel] [RFC] Physical hot-add cpus and TSC
User-agent: Microsoft-Entourage/12.24.0.100205
On 28/05/2010 07:29, "Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx> wrote:

>> It is impossible to meet that level of TSC consistency when doing CPU
>> physical-add, without emulating all guest TSCs. We may need to add that as
>> an option, at least, to keep a small class of apps that care (like Oracle's
>> DB, we assume) happy.
> 
> So a option to make TSC_MODE_DEFAULT as d->arch.vtsc=0 ?.
> When CPU_hotadd, we should at least warning if that option is not set, am I
> right?

Xen-unstable:21469.

 -- Keir



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

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