From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: [Qemu-devel] [RFC v5 86/86] 440fx: fix PAM, PCI holes Date: Mon, 25 Jul 2011 17:10:13 +0300 Message-ID: <4E2D7945.9020703@redhat.com> References: <1311180636-17012-1-git-send-email-avi@redhat.com> <1311180636-17012-87-git-send-email-avi@redhat.com> <4E2D6A97.9050606@codemonkey.ws> <4E2D6C45.5030308@redhat.com> <20110725131728.GD4404@redhat.com> <4E2D6F6C.5070301@redhat.com> <4E2D702F.6010400@redhat.com> <20110725133558.GH4404@redhat.com> <4E2D71F1.4090509@redhat.com> <4E2D73F3.8060507@codemonkey.ws> <4E2D7825.9030200@redhat.com> <4E2D78D1.8060105@codemonkey.ws> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1255; format=flowed Content-Transfer-Encoding: 7bit Cc: qemu-devel@nongnu.org, Gleb Natapov , kvm@vger.kernel.org To: Anthony Liguori Return-path: Received: from mx1.redhat.com ([209.132.183.28]:58537 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752071Ab1GYOKT (ORCPT ); Mon, 25 Jul 2011 10:10:19 -0400 In-Reply-To: <4E2D78D1.8060105@codemonkey.ws> Sender: kvm-owner@vger.kernel.org List-ID: On 07/25/2011 05:08 PM, Anthony Liguori wrote: >> Why not use 3.5GB and call it a day? It's safer for memory hotplug, if >> we ever get it. >> >> The guest will never put a PCI BAR below that anyway. > > > My entire concern is that they will. > > We're not just talking about Windows or Linux here, but any odd DOS > application that's smart enough to switch into 32-bit mode, > bootloaders, etc. > > It's a significant behaviorial change that goes against the spec for > no obviously good reason. > Okay, I'll update the patch. > Even if we supported hot plug, we could easily just hot plug above the > 4GB mark. Or change the PCI hole dynamically. -- error compiling committee.c: too many arguments to function