From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: cr3 OOS optimisation breaks 32-bit GNU/kFreeBSD guest Date: Mon, 23 Feb 2009 16:59:37 +0200 Message-ID: <49A2B9D9.3030103@redhat.com> References: <20090223003305.GW12976@hall.aurel32.net> <20090223014713.GA11438@amt.cnet> <20090223140115.GB5946@hall.aurel32.net> <20090223145208.GA5782@amt.cnet> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: Aurelien Jarno , kvm@vger.kernel.org To: Marcelo Tosatti Return-path: Received: from mx2.redhat.com ([66.187.237.31]:48892 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754606AbZBWO7r (ORCPT ); Mon, 23 Feb 2009 09:59:47 -0500 In-Reply-To: <20090223145208.GA5782@amt.cnet> Sender: kvm-owner@vger.kernel.org List-ID: Marcelo Tosatti wrote: >> Thanks for your fast answer and for your help for debugging. >> > > If you confirm that FreeBSD is indeed relying on cr3 to sync global > pages, it might be better to disable the optimization. Lets hope that is > not the case. > cr3 writes explicitly do not flush global pages; otherwise what would be the point of global pages at all? In other words, the only difference between global and non-global pages is visible via cr3 writes. -- error compiling committee.c: too many arguments to function