Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756067AbaGINzb (ORCPT ); Wed, 9 Jul 2014 09:55:31 -0400 Received: from userp1040.oracle.com ([156.151.31.81]:38435 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751778AbaGINza (ORCPT ); Wed, 9 Jul 2014 09:55:30 -0400 Date: Wed, 9 Jul 2014 09:55:19 -0400 From: Konrad Rzeszutek Wilk To: David Vrabel Cc: konrad@kernel.org, xen-devel@lists.xenproject.org, boris.ostrovsky@oracle.com, linux-kernel@vger.kernel.org Subject: Re: [Xen-devel] [PATCH v2] xen: Introduce 'xen_nopv' to disable PV extensions for HVM guests. Message-ID: <20140709135519.GB21837@laptop.dumpdata.com> References: <1404852745-25187-1-git-send-email-konrad@kernel.org> <53BD311B.2050404@citrix.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <53BD311B.2050404@citrix.com> User-Agent: Mutt/1.5.23 (2014-03-12) X-Source-IP: acsinet21.oracle.com [141.146.126.237] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jul 09, 2014 at 01:10:03PM +0100, David Vrabel wrote: > On 08/07/14 21:52, konrad@kernel.org wrote: > > From: Konrad Rzeszutek Wilk > > > > By default when CONFIG_XEN and CONFIG_XEN_PVHVM kernels are > > run, they will enable the PV extensions (drivers, interrupts, timers, > > etc) - which is perfect. > > If it's "perfect" what's this option for? ;) :-) > > I think you mean to say "which is the best option for the majority of > use cases". Yes! > > > However, in some cases (kexec not fully wokring, benchmarking) > > we want to disable Xen PV extensions. As such introduce the > > 'xen_nopv' parameter that will do it. > > "working" > > I'm unconvinced about the utility of this option. The resulting kernel > will go like molasses and I'm not sure what the use of being any to > benchmark a configuration no one will use in practice. But it's a small > patch so > > Reviewed-by: David Vrabel Thank you. > > David > > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xen.org > http://lists.xen.org/xen-devel -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/