Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751959AbaBLLML (ORCPT ); Wed, 12 Feb 2014 06:12:11 -0500 Received: from 8bytes.org ([85.214.48.195]:57847 "EHLO mail.8bytes.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751015AbaBLLMK (ORCPT ); Wed, 12 Feb 2014 06:12:10 -0500 Date: Wed, 12 Feb 2014 12:12:05 +0100 From: Joerg Roedel To: Borislav Petkov Cc: Peter Zijlstra , Stefan Bader , Paolo Bonzini , Linux Kernel Mailing List , kvm@vger.kernel.org, Marcelo Tosatti , MASAO TAKAHASHI Subject: Re: Another preempt folding issue? Message-ID: <20140212111205.GE23709@8bytes.org> References: <52FA6D4B.7020709@canonical.com> <20140211194553.GZ9987@twins.programming.kicks-ass.net> <52FB2EC8.4080602@canonical.com> <20140212103713.GE3545@laptop.programming.kicks-ass.net> <20140212104017.GA5121@pd.tnic> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20140212104017.GA5121@pd.tnic> User-Agent: Mutt/1.5.21 (2010-09-15) X-DSPAM-Result: Whitelisted X-DSPAM-Processed: Wed Feb 12 12:12:07 2014 X-DSPAM-Confidence: 0.9990 X-DSPAM-Probability: 0.0000 X-DSPAM-Signature: 52fb570720861005615564 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Feb 12, 2014 at 11:40:17AM +0100, Borislav Petkov wrote: > Also what I'm wondering about and what's not clear from Stefan's reply > is whether this is purely a 32-bit issue, i.e. a 32-bit host running a > 64-bit qemu running a 32-bit iso or what is it? > > Or do we have reports for both 32-bit and 64-bit hosts? As I understand it, the problem reproduces only on a 32bit host, which also limits the guests to 32bit, at least when ran with KVM. This is true even if a x86-64 qemu is used. This is also independent on whether the host-cpu supports 64bit or not. Joerg -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/