From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755175AbaKNKeS (ORCPT ); Fri, 14 Nov 2014 05:34:18 -0500 Received: from mail.skyhub.de ([78.46.96.112]:52990 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755057AbaKNKeQ (ORCPT ); Fri, 14 Nov 2014 05:34:16 -0500 Date: Fri, 14 Nov 2014 11:34:06 +0100 From: Borislav Petkov To: Andy Lutomirski Cc: "Luck, Tony" , Oleg Nesterov , X86 ML , "linux-kernel@vger.kernel.org" , Peter Zijlstra , Andi Kleen Subject: Re: [RFC PATCH] x86, entry: Switch stacks on a paranoid entry from userspace Message-ID: <20141114103406.GA7475@pd.tnic> References: <20141112220058.GA5295@redhat.com> <3908561D78D1C84285E8C5FCA982C28F3292BAB4@ORSMSX114.amr.corp.intel.com> <3908561D78D1C84285E8C5FCA982C28F3292BD44@ORSMSX114.amr.corp.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Nov 12, 2014 at 07:03:21PM -0800, Andy Lutomirski wrote: > printk seems to work just fine in do_machine_check. That must be pure luck. Has anything changed which I missed to make printk NMI-safe? -- Regards/Gruss, Boris. Sent from a fat crate under my desk. Formatting is fine. --