From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marek Olszewski Subject: KVM Page Fault Question Date: Thu, 18 Mar 2010 19:50:02 -0400 Message-ID: <4BA2BC2A.8090803@csail.mit.edu> References: <4B9726A7.7000800@csail.mit.edu> <4B976AA8.9030904@redhat.com> <4B9833EE.1070705@csail.mit.edu> <4B989035.4050109@redhat.com> <4B9916DE.30209@csail.mit.edu> <4B9B5225.2050604@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit To: kvm@vger.kernel.org Return-path: Received: from DMZ-MAILSEC-SCANNER-1.MIT.EDU ([18.9.25.12]:49818 "EHLO dmz-mailsec-scanner-1.mit.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751379Ab0CRXuG (ORCPT ); Thu, 18 Mar 2010 19:50:06 -0400 Received: from outgoing.mit.edu (OUTGOING-AUTH.MIT.EDU [18.7.22.103]) by mailhub-auth-3.mit.edu (8.13.8/8.9.2) with ESMTP id o2INo4Uk000613 for ; Thu, 18 Mar 2010 19:50:04 -0400 Received: from deadlock.csail.mit.edu (deadlock.csail.mit.edu [128.30.64.23]) (authenticated bits=0) (User authenticated as mareko@CSAIL.MIT.EDU@ATHENA.MIT.EDU) by outgoing.mit.edu (8.13.6/8.12.4) with ESMTP id o2INo24Z025850 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT) for ; Thu, 18 Mar 2010 19:50:03 -0400 (EDT) In-Reply-To: <4B9B5225.2050604@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: When using VMX without EPT, is it ever possible for a guest to receive a page fault without it first appearing (and being reinjected) in KVM? I'm seeing some strange behavior where accesses to mprotected (but yet to be accessed) memory causes a fault in the guest OS, that I cannot see KVM intercepting. Thanks! Marek