Re: [Xen-devel] Question about xc_translate_foreign_address()

To:	AP Xen <apxeng@xxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject:	Re: [Xen-devel] Question about xc_translate_foreign_address()
From:	Keir Fraser <keir.xen@xxxxxxxxx>
Date:	Wed, 25 May 2011 07:16:52 +0100
Cc:
Delivery-date:	Tue, 24 May 2011 23:18:04 -0700
Dkim-signature:	v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:user-agent:date:subject:from:to:message-id :thread-topic:thread-index:in-reply-to:mime-version:content-type :content-transfer-encoding; bh=+CKhNsqiMD9+Gdp2TyrvHfuEzf4cX5ZczhQdKjIgeHo=; b=C62pANn8s21c43vPy70hq1JAzmzlv2HLyz1aNYQgG9eXyWONX/qoVUC3BDx8K5RCIb f0t4J30nLPRCO7G/kE8c+5SDNbuIZBw8vq9rzC0YgvKE/fXS2Pnyy67qIpdVtzIs0EWa KpUAcIx1roLPjSa2kmK3bcp5htX+6eW8rc3yE=
Domainkey-signature:	a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=user-agent:date:subject:from:to:message-id:thread-topic :thread-index:in-reply-to:mime-version:content-type :content-transfer-encoding; b=MIW2zMYv00GuPyk9u+6j+9phixXGYd0+n/FbcmN5Ym6UCnyx7lqtqp4Br4BVwnwpx9 AD3x8HT0+BeZ5uWS6uCat+UR0+ZCsTDPYb56/vePPO4phFBpRo46NTTcX6VSe2qbuSio vDLCvTarhXTr29wADpUjnZJ1XkU5wDMedWgk8=
Envelope-to:	www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to:	<BANLkTinhjVHP+phtS45vNWn0=_kZmbMkGg@xxxxxxxxxxxxxx>
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:	Acwao1Z+wIEY7Sfx4U2G1JzYmM6e3w==
Thread-topic:	[Xen-devel] Question about xc_translate_foreign_address()
User-agent:	Microsoft-Entourage/12.29.0.110113

On 25/05/2011 05:47, "AP Xen" <apxeng@xxxxxxxxx> wrote:

> I have a question about xc_translate_foreign_address(). When this call
> is issued for VCPU1 in a 2 VCPU guest where VCPU1 is in a paused state
> and VCPU0 is active, there is a possibility that VCPU0 could change
> the page tables that VCPU1 is using. There is a window where the
> function could return incorrect information. Is this true or there is
> something that prevents it from happening?

The assumption is that the whole domain is paused.

 -- Keir

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



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

WARNING - OLD ARCHIVES

xen-devel

Re: [Xen-devel] Question about xc_translate_foreign_address()