From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9A0B1C432C0 for ; Fri, 22 Nov 2019 00:55:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 76D8720674 for ; Fri, 22 Nov 2019 00:55:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726554AbfKVAzz (ORCPT ); Thu, 21 Nov 2019 19:55:55 -0500 Received: from mga18.intel.com ([134.134.136.126]:57577 "EHLO mga18.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726038AbfKVAzy (ORCPT ); Thu, 21 Nov 2019 19:55:54 -0500 X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by orsmga106.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 21 Nov 2019 16:55:54 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.69,227,1571727600"; d="scan'208";a="381922129" Received: from agluck-desk2.sc.intel.com (HELO agluck-desk2.amr.corp.intel.com) ([10.3.52.68]) by orsmga005.jf.intel.com with ESMTP; 21 Nov 2019 16:55:53 -0800 Date: Thu, 21 Nov 2019 16:55:53 -0800 From: "Luck, Tony" To: Andy Lutomirski Cc: Peter Zijlstra , Ingo Molnar , Fenghua Yu , Thomas Gleixner , Ingo Molnar , Borislav Petkov , H Peter Anvin , Ashok Raj , Ravi V Shankar , linux-kernel , x86 Subject: Re: [PATCH v10 6/6] x86/split_lock: Enable split lock detection by kernel parameter Message-ID: <20191122005553.GA11322@agluck-desk2.amr.corp.intel.com> References: <20191121215126.GA9075@agluck-desk2.amr.corp.intel.com> <159DB397-87E2-435D-9F33-067FF9296ADC@amacapital.net> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <159DB397-87E2-435D-9F33-067FF9296ADC@amacapital.net> User-Agent: Mutt/1.12.1 (2019-06-15) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Nov 21, 2019 at 02:24:21PM -0800, Andy Lutomirski wrote: > > > On Nov 21, 2019, at 1:51 PM, Luck, Tony wrote: > > Almost all of what's in this set will be required in whatever > > final solution we want to end up with. Out of this: > > Why don’t we beat it into shape and apply it, hidden behind BROKEN. > Then we can work on the rest of the patches and have a way to test them. That's my goal (and thanks for the help with the constructive beating, "die" is a much better choice that "panic" at this stage of development). I'm not sure I see the need to hide it behind BROKEN. The reasoning behind choosing disabled by default was so that this wouldn't affect anyone unless they chose to turn it on. -Tony