From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chris Lalancette Subject: Re: write_tsc in a PV domain? Date: Thu, 27 Aug 2009 10:39:40 +0200 Message-ID: <4A96464C.1040209@redhat.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Dan Magenheimer Cc: Jeremy Fitzhardinge , "Xen-Devel (E-mail)" , Keir Fraser List-Id: xen-devel@lists.xenproject.org Dan Magenheimer wrote: > In that case, are you saying it is an illegal instruction for a PV > guest to execute? If so, we should not ignore it, we should fail > the guest. But that would be unfortunate for the RHEL5-64bit > PV guests that actually DO use it. Wait, what? Could you point out where this is in RHEL-5 64-bit PV? The only case of write_tsc() I see in the code is in arch/i386/kernel/smpboot.c, which is not used by the Xen PV implementation in RHEL-5. Where else in the PV implementation does a write_tsc? -- Chris Lalancette