From mboxrd@z Thu Jan  1 00:00:00 1970
From: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Subject: Re: vpmu=1 and running 'perf top' within a PVHVM guest
 eventually hangs dom0 and hypervisor has stuck vCPUS. Romley-EP (model=45,
 stepping=2)
Date: Fri, 29 Mar 2013 05:29:04 -0700 (PDT)
Message-ID: <2e28076a-79cf-4b3c-b5da-e9517180e45e@default>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <xen-devel-bounces@lists.xen.org>
Content-Disposition: inline
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: maillists.shan@gmail.com
Cc: xen-devel@lists.xensource.com, suravee.suthikulpanit@amd.com, qing.he@intel.com, konrad.wilk@oracle.com, eddie.dong@intel.com, donald.d.dugger@intel.com, xen-devel@lists.xen.org, jbeulich@suse.com, dietmar.hahn@ts.fujitsu.com, jun.nakajima@intel.com, jiongxi.li@intel.com
List-Id: xen-devel@lists.xenproject.org
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