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=-8.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 4642FC2D0A3 for ; Tue, 3 Nov 2020 12:42:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0140722384 for ; Tue, 3 Nov 2020 12:42:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728426AbgKCMmm (ORCPT ); Tue, 3 Nov 2020 07:42:42 -0500 Received: from mx2.suse.de ([195.135.220.15]:42622 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726581AbgKCMmm (ORCPT ); Tue, 3 Nov 2020 07:42:42 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 2D46EAC6F; Tue, 3 Nov 2020 12:42:41 +0000 (UTC) Date: Tue, 3 Nov 2020 13:43:23 +0100 From: Cyril Hrubis To: Thomas Gleixner Cc: Carlos O'Donell , Zack Weinberg , Dmitry Safonov , Andrei Vagin , GNU C Library , Linux Kernel Mailing List Subject: Re: [Y2038][time namespaces] Question regarding CLOCK_REALTIME support plans in Linux time namespaces Message-ID: <20201103124323.GA8061@yuki.lan> References: <20201030110229.43f0773b@jawa> <20201030135816.GA1790@yuki.lan> <87sg9vn40t.fsf@nanos.tec.linutronix.de> <72bbb207-b041-7710-98ad-b08579fe17e4@redhat.com> <87h7qbmqc3.fsf@nanos.tec.linutronix.de> <7bb5837f-1ff6-2b2c-089e-e2441d31ddb2@redhat.com> <87k0v7kwdc.fsf@nanos.tec.linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <87k0v7kwdc.fsf@nanos.tec.linutronix.de> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi! > Virtualization is the right answer to the testing problem and if people > really insist on running their broken legacy apps past 2038, then stick > them into a VM and charge boatloads of money for that service. Let me just emphasise this with a short story. Before I release LTP I do a lot of pre-release testruns to make sure that all tests works well on a different distributions and kernel versions. Before I wrote a script that automated this[1] i.e. runs all the tests in qemu and filters out the interesting results it took me a few days of manual labor to finish the task. Now I just schedulle the jobs and after a day or two I get the results. Even if the tested kernel crashes, which happens a lot, the machine is just restarted automatically and the testrun carries on with a next test. All in all the work that has been put into the solution wasn't that big to begin with it took me a week to write a first prototype from a scratch. [1] https://github.com/metan-ucw/runltp-ng -- Cyril Hrubis chrubis@suse.cz