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 18696C433EF for ; Fri, 24 Dec 2021 02:56:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1351044AbhLXC4M (ORCPT ); Thu, 23 Dec 2021 21:56:12 -0500 Received: from esa6.hc1455-7.c3s2.iphmx.com ([68.232.139.139]:39529 "EHLO esa6.hc1455-7.c3s2.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1351000AbhLXC4K (ORCPT ); Thu, 23 Dec 2021 21:56:10 -0500 IronPort-SDR: WTAAOhs+h3RjWQoh9Zzsu8ClJj8JhsgwM63K5obUFAgMkzfZW9w9t+t5QUG2IdkWonPv2TWm+2 XhHvyL5xdkWk661n201wAr/pYVe1gCfqUsry6F/peRVgLtGHBEWTOS8JsG5N58qmAJ6Q7WdtuT l5dRScP94pgFTPaXkz3wR2uLpCrI9agZienM7hSd/MIHKPFjElbvW5+Z90qjlVHbhLWKFvGKzf 7KWvxmqwFEn53vIg705xG5w1vw2RJLGWuqaFtM2DK+Y36xkxMISzKgTDoUAKi3vML9TZCWpSNA 5HiHK4jBm9Ac6pwG00nOWu7Z X-IronPort-AV: E=McAfee;i="6200,9189,10207"; a="57672820" X-IronPort-AV: E=Sophos;i="5.88,231,1635174000"; d="scan'208";a="57672820" Received: from unknown (HELO yto-r3.gw.nic.fujitsu.com) ([218.44.52.219]) by esa6.hc1455-7.c3s2.iphmx.com with ESMTP; 24 Dec 2021 11:56:09 +0900 Received: from yto-m2.gw.nic.fujitsu.com (yto-nat-yto-m2.gw.nic.fujitsu.com [192.168.83.65]) by yto-r3.gw.nic.fujitsu.com (Postfix) with ESMTP id 139706DAE5 for ; Fri, 24 Dec 2021 11:56:08 +0900 (JST) Received: from m3050.s.css.fujitsu.com (msm.b.css.fujitsu.com [10.134.21.208]) by yto-m2.gw.nic.fujitsu.com (Postfix) with ESMTP id 53EB7F36DE for ; Fri, 24 Dec 2021 11:56:07 +0900 (JST) Received: from localhost.localdomain (unknown [10.125.5.220]) by m3050.s.css.fujitsu.com (Postfix) with ESMTP id 2C90DB5; Fri, 24 Dec 2021 11:56:07 +0900 (JST) From: Rei Yamamoto To: tglx@linutronix.de Cc: linux-kernel@vger.kernel.org, geert+renesas@glider.be, yamamoto.rei@jp.fujitsu.com Subject: [RFC] hrtimer: About the warning message in hrtimer_interrupt() Date: Fri, 24 Dec 2021 11:39:24 +0900 Message-Id: <20211224023924.91851-1-yamamoto.rei@jp.fujitsu.com> X-Mailer: git-send-email 2.27.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When the following warning message of hrtimer_interrupt() is output, I often ignore it because I don't know what I should do. ----- kernel/time/hrtimer.c void hrtimer_interrupt(struct clock_event_device *dev) { : pr_warn_once("hrtimer: interrupt took %llu ns\n", ktime_to_ns(delta)); ----- What is the intention of this message? What action should be required for this warning?