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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 00C19C433FE for ; Thu, 20 Oct 2022 12:43:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230093AbiJTMnf (ORCPT ); Thu, 20 Oct 2022 08:43:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41074 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230085AbiJTMnb (ORCPT ); Thu, 20 Oct 2022 08:43:31 -0400 Received: from wp530.webpack.hosteurope.de (wp530.webpack.hosteurope.de [80.237.130.52]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C14DF180AC2 for ; Thu, 20 Oct 2022 05:43:30 -0700 (PDT) Received: from [2a02:8108:963f:de38:eca4:7d19:f9a2:22c5]; authenticated by wp530.webpack.hosteurope.de running ExIM with esmtpsa (TLS1.3:ECDHE_RSA_AES_128_GCM_SHA256:128) id 1olUtV-00068d-7Q; Thu, 20 Oct 2022 14:43:29 +0200 Message-ID: <2ec00aa0-ccd0-d7f2-261a-3457745545a8@leemhuis.info> Date: Thu, 20 Oct 2022 14:43:26 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.3.1 Subject: Re: v6.1-rc1: Regression in notification of sethostname changes Content-Language: en-US, de-DE To: Torsten Hilbrich , Petr Vorel Cc: linux-kernel@vger.kernel.org, "regressions@lists.linux.dev" References: <0c2b92a6-0f25-9538-178f-eee3b06da23f@secunet.com> From: Thorsten Leemhuis In-Reply-To: <0c2b92a6-0f25-9538-178f-eee3b06da23f@secunet.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-bounce-key: webpack.hosteurope.de;regressions@leemhuis.info;1666269810;12d2d788; X-HE-SMSGID: 1olUtV-00068d-7Q Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org [TLDR: I'm adding this regression report to the list of tracked regressions; all text from me you find below is based on a few templates paragraphs you might have encountered already already in similar form.] Hi, this is your Linux kernel regression tracker. CCing the regression mailing list, as it should be in the loop for all regressions, as explained here: https://www.kernel.org/doc/html/latest/admin-guide/reporting-issues.html On 19.10.22 10:29, Torsten Hilbrich wrote: > Hello Petr, > > your commit > > commit bfca3dd3d0680fc2fc7f659a152234afbac26e4d > Author: Petr Vorel > Date: Thu Sep 1 21:44:03 2022 +0200 > > kernel/utsname_sysctl.c: print kernel arch > > Print the machine hardware name (UTS_MACHINE) in /proc/sys/kernel/arch. > > This helps people who debug kernel with initramfs with minimal environment > (i.e. without coreutils or even busybox) or allow to open sysfs file > instead of run 'uname -m' in high level languages. > > broke the notification mechanism between the sethostname syscall and the pollers of /proc/sys/kernel/hostname. > > The table uts_kern_table is addressed within uts_proc_notify by the enum value, however no new enum value was added in "enum uts_proc". > > I noticed the problem when journald-systemd failed to detect hostname changes made with the sethostname syscall (as used by the hostname tool). > When setting the hostname through /proc/sys/kernel/hostname the poll notification was working. Thanks for the report. To be sure below issue doesn't fall through the cracks unnoticed, I'm adding it to regzbot, my Linux kernel regression tracking bot: #regzbot ^introduced bfca3dd3d0 #regzbot ignore-activity This isn't a regression? This issue or a fix for it are already discussed somewhere else? It was fixed already? You want to clarify when the regression started to happen? Or point out I got the title or something else totally wrong? Then just reply -- ideally with also telling regzbot about it, as explained here: https://linux-regtracking.leemhuis.info/tracked-regression/ Reminder for developers: When fixing the issue, add 'Link:' tags pointing to the report (the mail this one replies to), as explained for in the Linux kernel's documentation; above webpage explains why this is important for tracked regressions. Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat) P.S.: As the Linux kernel's regression tracker I deal with a lot of reports and sometimes miss something important when writing mails like this. If that's the case here, don't hesitate to tell me in a public reply, it's in everyone's interest to set the public record straight.