From mboxrd@z Thu Jan  1 00:00:00 1970
From: =?UTF-8?Q?Sebastian_Sch=c3=bctte?= <dracon@ewetel.net>
Subject: Re: [Bug 103321] New: NPT page attribute support causes extreme
 slowdown
Date: Tue, 15 Sep 2015 22:11:20 +0200
Message-ID: <55F87B68.4030902@ewetel.net>
References: <bug-103321-28872@https.bugzilla.kernel.org/>
 <55D90002.10703@redhat.com> <55DA16BB.4020004@ewetel.net>
 <55DA8054.7080900@redhat.com> <55E74785.2060701@ewetel.net>
 <55F84833.90003@redhat.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 8BIT
Cc: KVM list <kvm@vger.kernel.org>
To: Paolo Bonzini <pbonzini@redhat.com>
Return-path: <kvm-owner@vger.kernel.org>
Received: from mail-in11-06-pp.ewetel.de ([212.6.122.116]:13714 "EHLO
	mail-in11-pp.ewetel.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org
	with ESMTP id S1751415AbbIOULb convert rfc822-to-8bit (ORCPT
	<rfc822;kvm@vger.kernel.org>); Tue, 15 Sep 2015 16:11:31 -0400
In-Reply-To: <55F84833.90003@redhat.com>
Sender: kvm-owner@vger.kernel.org
List-ID: <kvm.vger.kernel.org>

> do you get normal speed?
Nope, still slow... I somehow missed that svm_set_msr() calls svm_set_guest_pat() as well, it does seem to properly change g_pat. The only thing that catches my eyes is that later on all WT entries in g_pat are replaced by WC (0x0007040600070406 -> 0x0007010600070106), but that doesn't seem to make a difference.

If it wasn't for some frustrating and badly timed libvirt update breaking my old VM config some days ago I would have noticed that earlier :/