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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS 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 CD43FC43441 for ; Tue, 13 Nov 2018 22:11:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9AA5F223D0 for ; Tue, 13 Nov 2018 22:11:18 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9AA5F223D0 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=telegraphics.com.au 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 S1731305AbeKNIL1 (ORCPT ); Wed, 14 Nov 2018 03:11:27 -0500 Received: from kvm5.telegraphics.com.au ([98.124.60.144]:39714 "EHLO kvm5.telegraphics.com.au" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731211AbeKNIL0 (ORCPT ); Wed, 14 Nov 2018 03:11:26 -0500 Received: from localhost (localhost.localdomain [127.0.0.1]) by kvm5.telegraphics.com.au (Postfix) with ESMTP id 204AC29EE7; Tue, 13 Nov 2018 17:11:13 -0500 (EST) Date: Wed, 14 Nov 2018 09:11:41 +1100 (AEDT) From: Finn Thain To: Michael Schmitz cc: Geert Uytterhoeven , Arnd Bergmann , Stephen N Chivers , Thomas Gleixner , Daniel Lezcano , John Stultz , linux-m68k , Linux Kernel Mailing List , Philip Blundell , Joshua Thompson Subject: Re: [RFC PATCH 06/13] m68k: Drop ARCH_USES_GETTIMEOFFSET In-Reply-To: <0054c37f-ef34-e892-ff1d-02968ab529fa@gmail.com> Message-ID: References: <74edaee07800f91eb416ab3e72c4670b8ef4bd4e.1541995959.git.fthain@telegraphics.com.au> <0054c37f-ef34-e892-ff1d-02968ab529fa@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 13 Nov 2018, Michael Schmitz wrote: > > Running a recent kernel under ARAnyM shows 40 ns resolution so the Atari > hardware emulation is a little more complete. > You mean, 40 us resolution, right? > Using that for initial tests, I can confirm that timer resolution is > reduced to 10ms after patch 6, and gets restored to 40ns after applying > the full series Thanks for testing! > (once clocksource_init runs, that is - the first part of the boot is at > 10ms resolution only, a regression compared to with use of > arch_gettimeoffset). > Sounds like a theoretical regression (?) Is there any need for more precise timers (I mean, better than 40 us) before clocksource_init runs? > Unfortunately, I can't log in at the console with all patches applied. I > immediately get the 'login timeout exceeded' message. Weird... > I didn't see that in my tests... Was this aranym or real hardware or both? Can you also test tree fbf8405cd982 please? -- > Cheers, > > Michael > >