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=-2.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_NEOMUTT autolearn=ham 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 3D70FECDFB8 for ; Mon, 23 Jul 2018 22:00:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E52BB20852 for ; Mon, 23 Jul 2018 22:00:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E52BB20852 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388189AbeGWXDV (ORCPT ); Mon, 23 Jul 2018 19:03:21 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:39100 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S2388137AbeGWXDU (ORCPT ); Mon, 23 Jul 2018 19:03:20 -0400 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 71F504023132; Mon, 23 Jul 2018 22:00:05 +0000 (UTC) Received: from treble (ovpn-121-132.rdu2.redhat.com [10.10.121.132]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 726222026D65; Mon, 23 Jul 2018 22:00:00 +0000 (UTC) Date: Mon, 23 Jul 2018 16:59:58 -0500 From: Josh Poimboeuf To: Pavel Machek Cc: Linus Torvalds , Joerg Roedel , Thomas Gleixner , Ingo Molnar , Peter Anvin , the arch/x86 maintainers , Linux Kernel Mailing List , linux-mm , Andrew Lutomirski , Dave Hansen , =?utf-8?B?SsO8cmdlbiBHcm/Dnw==?= , Peter Zijlstra , Borislav Petkov , Jiri Kosina , Boris Ostrovsky , Brian Gerst , David Laight , Denys Vlasenko , Eduardo Valentin , Greg Kroah-Hartman , Will Deacon , "Liguori, Anthony" , Daniel Gruss , Hugh Dickins , Kees Cook , Andrea Arcangeli , Waiman Long , "David H . Gutteridge" , Joerg Roedel , Arnaldo Carvalho de Melo , Alexander Shishkin , Jiri Olsa , Namhyung Kim Subject: Re: [PATCH 0/3] PTI for x86-32 Fixes and Updates Message-ID: <20180723215958.jozblzq4sv7gp7uj@treble> References: <1532103744-31902-1-git-send-email-joro@8bytes.org> <20180723140925.GA4285@amd> <20180723213830.GA4632@amd> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20180723213830.GA4632@amd> User-Agent: NeoMutt/20180323 X-Scanned-By: MIMEDefang 2.78 on 10.11.54.4 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.6]); Mon, 23 Jul 2018 22:00:05 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.6]); Mon, 23 Jul 2018 22:00:05 +0000 (UTC) for IP:'10.11.54.4' DOMAIN:'int-mx04.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'jpoimboe@redhat.com' RCPT:'' Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Jul 23, 2018 at 11:38:30PM +0200, Pavel Machek wrote: > But for now I'd like at least "global" option of turning pti on/off > during runtime for benchmarking. Let me see... > > Something like this, or is it going to be way more complex? Does > anyone have patch by chance? RHEL/CentOS has a global PTI enable/disable, which uses stop_machine(). -- Josh