From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754195AbaDMC4w (ORCPT ); Sat, 12 Apr 2014 22:56:52 -0400 Received: from mga01.intel.com ([192.55.52.88]:22034 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753432AbaDMC4u (ORCPT ); Sat, 12 Apr 2014 22:56:50 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.97,849,1389772800"; d="scan'208";a="519583046" From: Andi Kleen To: "H. Peter Anvin" Cc: Linus Torvalds , Borislav Petkov , Brian Gerst , Ingo Molnar , Linux Kernel Mailing List , Thomas Gleixner , stable , "H. Peter Anvin" Subject: Re: [tip:x86/urgent] x86-64, modify_ldt: Ban 16-bit segments on 64-bit kernels References: <6f5f98f2-aa96-433f-9ee8-5ba216624957@email.android.com> <20140412193541.GA30697@pd.tnic> <21a22ace-fbc3-4f97-a277-9cdf4f2253eb@email.android.com> <5349BD3F.6000402@zytor.com> Date: Sat, 12 Apr 2014 19:56:48 -0700 In-Reply-To: <5349BD3F.6000402@zytor.com> (H. Peter Anvin's message of "Sat, 12 Apr 2014 15:25:03 -0700") Message-ID: <87lhvahr7z.fsf@tassilo.jf.intel.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org "H. Peter Anvin" writes: > > But yes, we can make it configurable, but the default should almost > certainly be off. Why? Either it works or it doesn't. If it works it doesn't make any sense to have a sysctl. -Andi -- ak@linux.intel.com -- Speaking for myself only