From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chris Wright Subject: Re: [RFC PATCH 0/3] generic hypercall support Date: Thu, 7 May 2009 12:21:45 -0700 Message-ID: <20090507192145.GF3036@sequoia.sous-sol.org> References: <4A031471.7000406@novell.com> <4A0322F1.2000905@redhat.com> <4A032390.6030100@gmail.com> <4A032472.4030106@redhat.com> <4A03259B.3050500@gmail.com> <4A032771.6050703@redhat.com> <4A032A74.2020809@novell.com> <4A032FDD.8020209@redhat.com> <20090507190751.GE3036@sequoia.sous-sol.org> <4A033281.8050002@novell.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Chris Wright , Avi Kivity , Gregory Haskins , linux-kernel@vger.kernel.org, kvm@vger.kernel.org, Anthony Liguori To: Gregory Haskins Return-path: Received: from sous-sol.org ([216.99.217.87]:49662 "EHLO sequoia.sous-sol.org" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754946AbZEGTWH (ORCPT ); Thu, 7 May 2009 15:22:07 -0400 Content-Disposition: inline In-Reply-To: <4A033281.8050002@novell.com> Sender: kvm-owner@vger.kernel.org List-ID: * Gregory Haskins (ghaskins@novell.com) wrote: > Chris Wright wrote: > > * Avi Kivity (avi@redhat.com) wrote: > >> Gregory Haskins wrote: > >>> Cool, I will code this up and submit it. While Im at it, Ill run it > >>> through the "nullio" ringer, too. ;) It would be cool to see the > >>> pv-mmio hit that 2.07us number. I can't think of any reason why this > >>> will not be the case. > >>> > >> Don't - it's broken. It will also catch device assignment mmio and > >> hypercall them. > > > > Not necessarily. It just needs to be creative w/ IO_COND > > Hi Chris, > Could you elaborate? How would you know which pages to hypercall and > which to let PF? Was just thinking of some ugly mangling of the addr (I'm not entirely sure what would work best).