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=-5.0 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 A4A6BCA9EAE for ; Tue, 29 Oct 2019 14:36:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 77C602087E for ; Tue, 29 Oct 2019 14:36:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="bPqUjDxm" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389382AbfJ2OgI (ORCPT ); Tue, 29 Oct 2019 10:36:08 -0400 Received: from merlin.infradead.org ([205.233.59.134]:40922 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389354AbfJ2OgI (ORCPT ); Tue, 29 Oct 2019 10:36:08 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=merlin.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=Q0gVh9X/7nYxxKWmI/KCgIs9TYYtfnzLB+dvCDbXPUw=; b=bPqUjDxmApPtuXn5WBKGWnY2z 8VDEy5tDV4FprdIQYjVVTOCM1qM8TZiL4MKhSR7MJa9ZGTJA0B/BLvTinqpkyeidxSvCXdnnDJQU5 25BY5CurPvc4hEdLjiNq1F06P+l2ezkqmMzCZfWja6eyHyo2+tfTMW1aE5AkJzNDpYgP9VyaBYwo5 U+1utmtJaEPXAlky3yIFPQfN7n92acCn7lKmwYXF6gs8Zliv7etCKJvd/MUQIvZrenQC5wRPRFs74 O+YO93K94JvhkJCo2gDIM8CCrIgGBXSL4/bjqh/X+Qg2N6PAf3Pg/91Ud2jRwY6wOgQLTsfknsUXg MD6gDw24A==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by merlin.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1iPSb7-0003zn-Tt; Tue, 29 Oct 2019 14:35:50 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 95DB5306091; Tue, 29 Oct 2019 15:34:46 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 568BB2B437E86; Tue, 29 Oct 2019 15:35:47 +0100 (CET) Date: Tue, 29 Oct 2019 15:35:47 +0100 From: Peter Zijlstra To: Paul Menzel Cc: Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , Arjan van de Ven , x86@kernel.org, LKML Subject: Re: [PATCH] smpboot: reuse timer calibration Message-ID: <20191029143547.GO4114@hirez.programming.kicks-ass.net> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Oct 29, 2019 at 03:19:57PM +0100, Paul Menzel wrote: > From: Arjan van de Ven > Date: Wed, 11 Feb 2015 17:28:14 -0600 > > NO point recalibrating for known-constant tsc ... > saves 200ms+ of boot time. > > Signed-off-by: Paul Menzel > --- > > Arjan, can your Signed-off-by line be added? On what device, did you test > this? This patch makes no sense what so ever given the current function, also it hard codes 0 as being the BSP. All of this for platforms (!constant_tsc) that barely exist anymore.