From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: [PATCH] KVM: Discard reserved bits checking on PDE bit 7-8 Date: Thu, 02 Apr 2009 11:58:47 +0300 Message-ID: <49D47E47.5060706@redhat.com> References: <1238639317-23994-1-git-send-email-sheng@linux.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Eddie Dong , kvm@vger.kernel.org To: Sheng Yang Return-path: Received: from mx2.redhat.com ([66.187.237.31]:56204 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760868AbZDBI6u (ORCPT ); Thu, 2 Apr 2009 04:58:50 -0400 In-Reply-To: <1238639317-23994-1-git-send-email-sheng@linux.intel.com> Sender: kvm-owner@vger.kernel.org List-ID: Sheng Yang wrote: > 1. It's related to a Linux kernel bug which fixed by Ingo on > 07a66d7c53a538e1a9759954a82bb6c07365eff9. The original code exists for quite a > long time, and it would convert a PDE for large page into a normal PDE. But it > fail to fit normal PDE well. With the code before Ingo's fix, the kernel would > fall reserved bit checking with bit 8 - the remaining global bit of PTE. So the > kernel would receive a double-fault. > > 2. After discussion, we decide to discard PDE bit 7-8 reserved checking for now. > For this marked as reserved in SDM, but didn't checked by the processor in > fact... > Applied, thanks. -- error compiling committee.c: too many arguments to function