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 1B4B1C61DA4 for ; Thu, 2 Feb 2023 23:37:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232935AbjBBXhA (ORCPT ); Thu, 2 Feb 2023 18:37:00 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52862 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231359AbjBBXg7 (ORCPT ); Thu, 2 Feb 2023 18:36:59 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E48A5123 for ; Thu, 2 Feb 2023 15:36:58 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 88C9561D18 for ; Thu, 2 Feb 2023 23:36:58 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D96D2C433EF; Thu, 2 Feb 2023 23:36:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1675381017; bh=F8E3hVfj0H1UmpdBrXggcTCe0572DLG2UQr28aPbEAs=; h=Date:To:From:Subject:From; b=0SubnJ9hdKO1oWe+hozEN3OEE1/UZMPEVioMKjcQNyznXJ1w9CzWQIsDpaTY4xDW3 VdONsO2mZVfTMFmNSS33rbjnu+OFp71Oq5yPGTZGba4gsLFwBzdsUdRnZT9E+8pXEy CLhtCPL5In9bu3DWho0G2zdYdIdk+0zOc6dXSZhk= Date: Thu, 02 Feb 2023 15:36:57 -0800 To: mm-commits@vger.kernel.org, pmladek@suse.com, linux@rasmusvillemoes.dk, fuyuanli@didiglobal.com, akpm@linux-foundation.org From: Andrew Morton Subject: + hung_task-print-message-when-hung_task_warnings-gets-down-to-zero.patch added to mm-nonmm-unstable branch Message-Id: <20230202233657.D96D2C433EF@smtp.kernel.org> Precedence: bulk Reply-To: linux-kernel@vger.kernel.org List-ID: X-Mailing-List: mm-commits@vger.kernel.org The patch titled Subject: hung_task: print message when hung_task_warnings gets down to zero. has been added to the -mm mm-nonmm-unstable branch. Its filename is hung_task-print-message-when-hung_task_warnings-gets-down-to-zero.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/hung_task-print-message-when-hung_task_warnings-gets-down-to-zero.patch This patch will later appear in the mm-nonmm-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: fuyuanli Subject: hung_task: print message when hung_task_warnings gets down to zero. Date: Wed, 1 Feb 2023 21:54:33 +0800 It's useful to report it when hung_task_warnings gets down to zero, so that we can know if kernel log was lost or there is no hung task was detected. Link: https://lkml.kernel.org/r/20230201135416.GA6560@didi-ThinkCentre-M920t-N000 Signed-off-by: fuyuanli Reviewed-by: Petr Mladek Cc: Rasmus Villemoes Signed-off-by: Andrew Morton --- --- a/kernel/hung_task.c~hung_task-print-message-when-hung_task_warnings-gets-down-to-zero +++ a/kernel/hung_task.c @@ -142,6 +142,8 @@ static void check_hung_task(struct task_ if (sysctl_hung_task_all_cpu_backtrace) hung_task_show_all_bt = true; + if (!sysctl_hung_task_warnings) + pr_info("Future hung task reports are suppressed, see sysctl kernel.hung_task_warnings\n"); } touch_nmi_watchdog(); _ Patches currently in -mm which might be from fuyuanli@didiglobal.com are hung_task-print-message-when-hung_task_warnings-gets-down-to-zero.patch