Received: by 2002:a05:6902:102b:0:0:0:0 with SMTP id x11csp2159407ybt; Fri, 3 Jul 2020 02:18:36 -0700 (PDT) X-Google-Smtp-Source: ABdhPJycjnlaF9LxGtGR+gu4KA1RTadN0OKtSE2hNt6/KHUdv59D71OcYNLoNy/vinhD7XI6aOgY X-Received: by 2002:a05:6402:180a:: with SMTP id g10mr27582118edy.152.1593767915863; Fri, 03 Jul 2020 02:18:35 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1593767915; cv=none; d=google.com; s=arc-20160816; b=aR3EXtxP3dBNY+Wy+n0qY8nc6qTf7zbn5vXNXopqR8O+Iq8RqP7XDtJrgzHNNntmqM sPcV/JmweMW8Kgc7IsebuWPODOx95uwSI2gtESyWe6HBwtJzXnNi0n6IBL5fxKQheXza ykurGIVs3727lk1Xw/Of/HkxlJcc4yNPHa5Pzy6YQaDIycbV7g8flSBqNRMZ8f/NiG1f U3lQlNt4/I9uTm7IOY1d4+CAJ97/5Gp1n7jQC2nowYwn2ikxnFRBmYjhw3iV9WgHRyEA lYyXtcDlc4XyHzjhVp6KJoVqhpdlY2JWxCswgDsvznOkYj4wU2MyYVFjBLek7b3jg5Uu TUxw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:mime-version:message-id:date:references :in-reply-to:subject:cc:to:dkim-signature:dkim-signature:from; bh=7qT2Qloe0viLOSply2DEdZk8V558qJCt/ksLt+nNRlQ=; b=hv9euCe41pFz1So9wywE7I7qJqwoqDbzamJL/sElpCAy7lfClcSBiKUA83Dy882AtV 3VoBoDPpkXUVR/xaAfDOveDtpTOgQtaTFBb/E/Bcxxwym1aaQGV+T1LNS/fPucdLNTrD YDXqQcZBYf5lh5aUpzEXXRobrdfvPcYsP0CsVLZkGu9Y0EEc936B7nXj9JKCoeD97pO5 xfKI8dvtDiPs+vHouixfLqoCOCNxm+DkEkvaSqpgDOTGXWP31P68Z7bAlwhVbhsaSRXz fc5MrdkIzOqaEKNFKofAcFWF5FS6YIw9a8BtF1QZdueb9MSB0yY+PCkxcB2UbHya9zN9 Z2Kw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linutronix.de header.s=2020 header.b="31Ki3lq/"; dkim=neutral (no key) header.i=@linutronix.de; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=linutronix.de Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id a18si7727283edn.607.2020.07.03.02.18.12; Fri, 03 Jul 2020 02:18:35 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@linutronix.de header.s=2020 header.b="31Ki3lq/"; dkim=neutral (no key) header.i=@linutronix.de; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=linutronix.de Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726327AbgGCJNV (ORCPT + 99 others); Fri, 3 Jul 2020 05:13:21 -0400 Received: from Galois.linutronix.de ([193.142.43.55]:58162 "EHLO galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725648AbgGCJNU (ORCPT ); Fri, 3 Jul 2020 05:13:20 -0400 From: Thomas Gleixner DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1593767599; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=7qT2Qloe0viLOSply2DEdZk8V558qJCt/ksLt+nNRlQ=; b=31Ki3lq/5cx2ZwGqJt/f0CC1cono3zE9U5KoOc31WGqOofL736M1DV51qhO9ecwf6OdEC/ X37oLbgqKp72/YgSdB2zLLO3KwFaHWDgWvSRMQvRdIQCzr+BHumaNmQw1HQ33ktF/ERXnY u/fLiYpc+3+/g8uVMkpWsf6QrNq2axQfRpZrUJGkOGIVaaUNmWWnPAnpAXjX0Kf07tGF1N UQsTEZ7MqI83z7vJJ4Gm4tfnKR0XlCYx8XStkn/rVyVKQTFQCu2QuI9IaurFwkLJrI3bNh LiTutmjK6AFH/ZhA7ITedg8mzDDrPhUpYkDG+4j8r+qoydhDPr8ebeqrBHACmQ== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1593767599; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=7qT2Qloe0viLOSply2DEdZk8V558qJCt/ksLt+nNRlQ=; b=xnCHBv4R2r+2YVTpSXsBo9v+tua2HoX4oVs0A3FriW8mA1qgnHdieZu7W7C2+oPUU67L8i G3/2rhLgnGWcW9CA== To: Frederic Weisbecker Cc: LKML , Anna-Maria Gleixner , Peter Zijlstra , Juri Lelli Subject: Re: [RFC PATCH 10/10] timer: Lower base clock forwarding threshold In-Reply-To: <20200703001219.GD27417@lenoir> References: <20200702133219.GA27417@lenoir> <87zh8irltc.fsf@nanos.tec.linutronix.de> <20200703001219.GD27417@lenoir> Date: Fri, 03 Jul 2020 11:13:18 +0200 Message-ID: <87pn9drmfl.fsf@nanos.tec.linutronix.de> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Frederic Weisbecker writes: > On Thu, Jul 02, 2020 at 05:14:23PM +0200, Thomas Gleixner wrote: >> >> The reason for this < 2 is historical and goes back to the oddities of >> the original timer wheel before the big rewrite. > > Ok. And is it still needed today or can we now forward even with a 1 delta? I haven't found anything which requires it. But be aware of dragons ....