From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Cooper Subject: Re: Intermittent fatal page fault with XEN 4.3.1 (Centos 6.3 DOM0 with linux kernel 3.10.16.) Date: Wed, 6 Nov 2013 17:07:53 +0000 Message-ID: <527A7769.8070700@citrix.com> References: <5278D0BB02000078000FF6E4@nat28.tlf.novell.com> <527912E9.3010304@xen.org> <5E2B3362-4D93-4FEF-987A-E477B0DCEE51@mcafee.com> <527A5BB50200007800100255@nat28.tlf.novell.com> <4E8EC677-8D22-4672-9C5C-12DD094107D2@McAfee.com> <1383754737.26213.136.camel@kazak.uk.xensource.com> <527A7454.9060309@citrix.com> <1383757590.26213.139.camel@kazak.uk.xensource.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1Ve6aD-0005GT-Jp for xen-devel@lists.xenproject.org; Wed, 06 Nov 2013 17:07:57 +0000 In-Reply-To: <1383757590.26213.139.camel@kazak.uk.xensource.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Ian Campbell Cc: lars.kurth.xen@gmail.com, xen-devel@lists.xenproject.org, lars.kurth@xen.org, Jeff_Zimmerman@McAfee.com, JBeulich@suse.com List-Id: xen-devel@lists.xenproject.org On 06/11/13 17:06, Ian Campbell wrote: > On Wed, 2013-11-06 at 16:54 +0000, Andrew Cooper wrote: >> I looked over the xl code and thought that nestedhvm should default to >> false, but I would prefer someone more familar with libxl and the idl to >> confirm what the default should be. > libxl thinks the default is false and will set HVM_PARAM_NESTEDHVM to 0 > in that case. Is there some way to query the hypervisor for what it > thinks the setting is? > > Ian. > > A get hvmparam hypercall will retrieve the value, but it is initialised to 0 and only ever set by a set hvmparam hypercall. ~Andrew