Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753453AbcCTS7T (ORCPT ); Sun, 20 Mar 2016 14:59:19 -0400 Received: from mail.skyhub.de ([78.46.96.112]:38058 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752515AbcCTS6R (ORCPT ); Sun, 20 Mar 2016 14:58:17 -0400 Date: Sun, 20 Mar 2016 19:58:13 +0100 From: Borislav Petkov To: Andrey Korolyov Cc: Marc Haber , Linux Kernel Mailing List , kvm ML Subject: Re: Major KVM issues with kernel 4.5 on the host Message-ID: <20160320185813.GG4230@pd.tnic> References: <20160317165435.GB3022@torres.zugschlus.de> <20160317181128.GA30324@pd.tnic> <20160318184929.GA949@torres.zugschlus.de> <20160318220429.GH7817@pd.tnic> <20160319000837.GF10135@torres.zugschlus.de> <20160320133158.GD4230@pd.tnic> <20160320182516.GE4230@pd.tnic> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 799 Lines: 22 On Sun, Mar 20, 2016 at 09:42:15PM +0300, Andrey Korolyov wrote: > Yes, I suggested that the issue could fall over a different family as > well to expose explicit corruption of a guest pages (as opposed to a > generic corruption in a known case). Probably, but I don't think it is microcode patch related. > Since there is no direct evidence of what exactly (data or pgt) is > getting corrupted, would disabling npt for a testing purposes be > helpful? So I'm not sure what even happens here yet. I haven't seen anything out of the ordinary in Marc's dmesg and I wasn't able to reproduce either. So would it be good to try with "npt=0"? Sure, why not. Marc, you could give that a try to see if it changes anything... -- Regards/Gruss, Boris. ECO tip #101: Trim your mails when you reply.