From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753482AbcD0RHn (ORCPT ); Wed, 27 Apr 2016 13:07:43 -0400 Received: from foss.arm.com ([217.140.101.70]:37225 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752684AbcD0RHk (ORCPT ); Wed, 27 Apr 2016 13:07:40 -0400 Subject: Re: [RFC PATCH v1 02/18] x86: Secure Memory Encryption (SME) build enablement To: Pavel Machek , Borislav Petkov References: <20160426225553.13567.19459.stgit@tlendack-t1.amdoffice.net> <20160426225614.13567.47487.stgit@tlendack-t1.amdoffice.net> <20160322130150.GB16528@xo-6d-61-c0.localdomain> <5720D810.9060602@amd.com> <20160427153010.GA7861@amd> <20160427154140.GK21011@pd.tnic> <20160427164137.GA11779@amd> Cc: linux-efi@vger.kernel.org, kvm@vger.kernel.org, =?UTF-8?B?UmFkaW0gS3LEjW3DocWZ?= , Matt Fleming , x86@kernel.org, linux-mm@kvack.org, Alexander Potapenko , "H. Peter Anvin" , linux-arch@vger.kernel.org, Jonathan Corbet , linux-doc@vger.kernel.org, kasan-dev@googlegroups.com, Ingo Molnar , Andrey Ryabinin , Tom Lendacky , Arnd Bergmann , Thomas Gleixner , Dmitry Vyukov , linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, Paolo Bonzini From: Robin Murphy Message-ID: <5720F1D6.7020400@arm.com> Date: Wed, 27 Apr 2016 18:07:34 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0 MIME-Version: 1.0 In-Reply-To: <20160427164137.GA11779@amd> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 27/04/16 17:41, Pavel Machek wrote: > On Wed 2016-04-27 17:41:40, Borislav Petkov wrote: >> On Wed, Apr 27, 2016 at 05:30:10PM +0200, Pavel Machek wrote: >>> Doing it early will break bisect, right? >> >> How exactly? Please do tell. > > Hey look, SME slowed down 30% since being initially merged into > kernel! As opposed to "well, bisection shows these n+1 complicated changes are all fine and the crash is down to this Kconfig patch", presumably. I'm sure we all love spending a whole afternoon only to find that, right? :P Robin. > Pavel > From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-f200.google.com (mail-pf0-f200.google.com [209.85.192.200]) by kanga.kvack.org (Postfix) with ESMTP id 6D9736B0005 for ; Wed, 27 Apr 2016 13:07:40 -0400 (EDT) Received: by mail-pf0-f200.google.com with SMTP id b203so96273550pfb.1 for ; Wed, 27 Apr 2016 10:07:40 -0700 (PDT) Received: from foss.arm.com (foss.arm.com. [217.140.101.70]) by mx.google.com with ESMTP id q9si1188205paz.202.2016.04.27.10.07.39 for ; Wed, 27 Apr 2016 10:07:39 -0700 (PDT) Subject: Re: [RFC PATCH v1 02/18] x86: Secure Memory Encryption (SME) build enablement References: <20160426225553.13567.19459.stgit@tlendack-t1.amdoffice.net> <20160426225614.13567.47487.stgit@tlendack-t1.amdoffice.net> <20160322130150.GB16528@xo-6d-61-c0.localdomain> <5720D810.9060602@amd.com> <20160427153010.GA7861@amd> <20160427154140.GK21011@pd.tnic> <20160427164137.GA11779@amd> From: Robin Murphy Message-ID: <5720F1D6.7020400@arm.com> Date: Wed, 27 Apr 2016 18:07:34 +0100 MIME-Version: 1.0 In-Reply-To: <20160427164137.GA11779@amd> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Pavel Machek , Borislav Petkov Cc: linux-efi@vger.kernel.org, kvm@vger.kernel.org, =?UTF-8?B?UmFkaW0gS3LEjW3DocWZ?= , Matt Fleming , x86@kernel.org, linux-mm@kvack.org, Alexander Potapenko , "H. Peter Anvin" , linux-arch@vger.kernel.org, Jonathan Corbet , linux-doc@vger.kernel.org, kasan-dev@googlegroups.com, Ingo Molnar , Andrey Ryabinin , Tom Lendacky , Arnd Bergmann , Thomas Gleixner , Dmitry Vyukov , linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, Paolo Bonzini On 27/04/16 17:41, Pavel Machek wrote: > On Wed 2016-04-27 17:41:40, Borislav Petkov wrote: >> On Wed, Apr 27, 2016 at 05:30:10PM +0200, Pavel Machek wrote: >>> Doing it early will break bisect, right? >> >> How exactly? Please do tell. > > Hey look, SME slowed down 30% since being initially merged into > kernel! As opposed to "well, bisection shows these n+1 complicated changes are all fine and the crash is down to this Kconfig patch", presumably. I'm sure we all love spending a whole afternoon only to find that, right? :P Robin. > Pavel > -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org