From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753460Ab3AZSV1 (ORCPT ); Sat, 26 Jan 2013 13:21:27 -0500 Received: from mo-p00-ob.rzone.de ([81.169.146.161]:30266 "EHLO mo-p00-ob.rzone.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752343Ab3AZSVZ (ORCPT ); Sat, 26 Jan 2013 13:21:25 -0500 X-RZG-AUTH: :P2EQZWCpfu+qG7CngxMFH1J+zrwiavkK6tmQaLfmztM8TOFHiy0MEozS X-RZG-CLASS-ID: mo00 Date: Sat, 26 Jan 2013 19:21:15 +0100 From: Olaf Hering To: KY Srinivasan Cc: "linux-kernel@vger.kernel.org" , Greg KH , "Jan Beulich (JBeulich@suse.com)" Subject: Re: [PATCH] x86: Hyper-V: register clocksource only if its advertised Message-ID: <20130126182114.GA26786@aepfle.de> References: <1359121036-16309-1-git-send-email-olaf@aepfle.de> <761b736ff1854810bfe272961248e6d2@BLUPR03MB050.namprd03.prod.outlook.com> <20130125165443.GA15833@aepfle.de> <500ca90f5d3e4d4f80c7fb62c34d36f0@BLUPR03MB050.namprd03.prod.outlook.com> <20130125171923.GA19306@aepfle.de> <542f1d12e3ee46f48a85a143361c113d@SN2PR03MB061.namprd03.prod.outlook.com> <20130125200000.GA9712@aepfle.de> <050ad0e312b54ff3af424c7128144a4d@SN2PR03MB061.namprd03.prod.outlook.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <050ad0e312b54ff3af424c7128144a4d@SN2PR03MB061.namprd03.prod.outlook.com> User-Agent: Mutt/1.5.21.rev5632 (2013-01-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Jan 26, KY Srinivasan wrote: > > > > -----Original Message----- > > From: Olaf Hering [mailto:olaf@aepfle.de] > > Sent: Friday, January 25, 2013 3:00 PM > > To: KY Srinivasan > > Cc: linux-kernel@vger.kernel.org; Greg KH; Jan Beulich (JBeulich@suse.com) > > Subject: Re: [PATCH] x86: Hyper-V: register clocksource only if its advertised > > > > On Fri, Jan 25, KY Srinivasan wrote: > > > > > Your current approach of using the "Partition Reference Counter" > > > feature bit is very fragile. Let us assume that future Windows guests > > > depend on this feature; Xen would certainly emulate this to have a > > > "good" emulation of Hyper-V and we are back to square one. > > > > If Xen starts to emulate the "Partition Reference Counter" feature, > > wouldnt it also advertise this feature? > > Olaf, did you get a chance to investigate why the viridian bit was set > for the Linux HVM domain. I dont know, most likely XenServer sets this per default? > I am thinking of re-sending the patch for delivering the Hyper-V vmbus > on a separate vector without a run-time check. Let me know. Are you also acking/nacking this patch? Olaf