From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932398Ab3B1Qct (ORCPT ); Thu, 28 Feb 2013 11:32:49 -0500 Received: from mail.skyhub.de ([78.46.96.112]:37156 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755815Ab3B1Qcs (ORCPT ); Thu, 28 Feb 2013 11:32:48 -0500 Date: Thu, 28 Feb 2013 17:32:39 +0100 From: Borislav Petkov To: Boris Ostrovsky Cc: "H. Peter Anvin" , Konrad Rzeszutek Wilk , Greg KH , mingo@redhat.com, tglx@linutronix.de, xen-devel@lists.xen.org, linux-kernel@vger.kernel.org, samu.kallio@aberdeencloud.com, kraman@redhat.com, jwboyer@redhat.com Subject: Re: Is: x86: mm: Fix vmalloc_fault oops during lazy MMU updates Was: Re: [PATCH] mm/x86: Flush lazy MMU when DEBUG_PAGEALLOC is set Message-ID: <20130228163239.GE9767@pd.tnic> Mail-Followup-To: Borislav Petkov , Boris Ostrovsky , "H. Peter Anvin" , Konrad Rzeszutek Wilk , Greg KH , mingo@redhat.com, tglx@linutronix.de, xen-devel@lists.xen.org, linux-kernel@vger.kernel.org, samu.kallio@aberdeencloud.com, kraman@redhat.com, jwboyer@redhat.com References: <512E8B41.8000504@zytor.com> <20130227230009.GA32465@kroah.com> <512E91B7.6060102@zytor.com> <20130228142910.GA32354@phenom.dumpdata.com> <20130228153846.GA9782@pd.tnic> <512F7D88.4090703@zytor.com> <20130228161057.GC9767@pd.tnic> <512F83C4.6080904@oracle.com> <20130228162227.GD9767@pd.tnic> <512F856B.5090801@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <512F856B.5090801@oracle.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Feb 28, 2013 at 11:27:23AM -0500, Boris Ostrovsky wrote: > What was the suggestion exactly? I don't remember seeing that message. Use the paravirt patching facility to replace arch_flush_lazy_mmu_mode() with a nop when running on baremetal. I.e., the whole functionality around apply_paravirt() et al. -- Regards/Gruss, Boris. Sent from a fat crate under my desk. Formatting is fine. --