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=-2.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT 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 E7FC9C10F13 for ; Tue, 9 Apr 2019 02:06:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BFCFB213F2 for ; Tue, 9 Apr 2019 02:06:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727039AbfDICGl (ORCPT ); Mon, 8 Apr 2019 22:06:41 -0400 Received: from mga18.intel.com ([134.134.136.126]:58325 "EHLO mga18.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726133AbfDICGl (ORCPT ); Mon, 8 Apr 2019 22:06:41 -0400 X-Amp-Result: UNSCANNABLE X-Amp-File-Uploaded: False Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga106.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 08 Apr 2019 19:06:40 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,327,1549958400"; d="scan'208";a="221742121" Received: from ranerica-svr.sc.intel.com ([172.25.110.23]) by orsmga001.jf.intel.com with ESMTP; 08 Apr 2019 19:06:39 -0700 Date: Mon, 8 Apr 2019 19:05:30 -0700 From: Ricardo Neri To: Thomas Gleixner Cc: "Paul E. McKenney" , Ingo Molnar , Borislav Petkov , Ashok Raj , Andi Kleen , Peter Zijlstra , "Ravi V. Shankar" , x86@kernel.org, linux-kernel@vger.kernel.org, Ricardo Neri , "H. Peter Anvin" , Tony Luck , "Rafael J. Wysocki" , Don Zickus , Nicholas Piggin , Michael Ellerman , Frederic Weisbecker , Alexei Starovoitov , Babu Moger , "David S. Miller" , Benjamin Herrenschmidt , Paul Mackerras , Mathieu Desnoyers , Masami Hiramatsu , Andrew Morton , Philippe Ombredanne , Colin Ian King , Byungchul Park , "Luis R. Rodriguez" , Waiman Long , Josh Poimboeuf , Randy Dunlap , Davidlohr Bueso , Christoffer Dall , Marc Zyngier , Kai-Heng Feng , Konrad Rzeszutek Wilk , David Rientjes , sparclinux@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Subject: Re: [RFC PATCH v2 09/14] watchdog/hardlockup: Make arch_touch_nmi_watchdog() to hpet-based implementation Message-ID: <20190409020530.GA7197@ranerica-svr.sc.intel.com> References: <1551283518-18922-1-git-send-email-ricardo.neri-calderon@linux.intel.com> <1551283518-18922-10-git-send-email-ricardo.neri-calderon@linux.intel.com> <20190227161758.GE4072@linux.ibm.com> <20190301011713.GA8058@ranerica-svr.sc.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.4 (2018-02-28) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Mar 26, 2019 at 10:20:41PM +0100, Thomas Gleixner wrote: > On Thu, 28 Feb 2019, Ricardo Neri wrote: > > > > > > > > -#if defined(CONFIG_HARDLOCKUP_DETECTOR_PERF) > > > > +#if defined(CONFIG_HARDLOCKUP_DETECTOR_PERF) || \ > > > > + defined(CONFIG_X86_HARDLOCKUP_DETECTOR_HPET) > > > > > > Why not instead make CONFIG_X86_HARDLOCKUP_DETECTOR_HPET select > > > CONFIG_HARDLOCKUP_DETECTOR_PERF? Keep the arch-specific details > > > in the arch-specific files and all that. > > > > Thanks for your feedback, Paul! The HPET implementation does not use > > perf. Thus, in my opinion is not correct for the HPET HLD to select > > the perf implementation. Patch 8 of this series splits the perf-specific > > code and the generic hardlockup detector code. Does this make sense? > > That's what intermediate config symbols are for. > > config HARDLOCKUP_DETECTOR_CORE > bool > > And make both PERF and HPET select it. I'll implement it in this manner. Thanks and BR, Ricardo