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=-3.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=no 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 8E52DCA9EBB for ; Thu, 24 Oct 2019 11:49:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6CF3E2166E for ; Thu, 24 Oct 2019 11:49:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2439349AbfJXLtq (ORCPT ); Thu, 24 Oct 2019 07:49:46 -0400 Received: from mx2.suse.de ([195.135.220.15]:50006 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726326AbfJXLtp (ORCPT ); Thu, 24 Oct 2019 07:49:45 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 41745ABB1; Thu, 24 Oct 2019 11:49:44 +0000 (UTC) From: Petr Mladek To: Thomas Gleixner , Ingo Molnar , Peter Zijlstra Cc: Laurence Oberman , Vincent Whitchurch , Michal Hocko , linux-kernel@vger.kernel.org, Petr Mladek Subject: [PATCH 0/3] watchdog/softlockup: Report overall time and some cleanup Date: Thu, 24 Oct 2019 13:49:25 +0200 Message-Id: <20191024114928.15377-1-pmladek@suse.com> X-Mailer: git-send-email 2.16.4 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is rework of the softlockup improvements sent as https://lkml.kernel.org/r/20190819104732.20966-1-pmladek@suse.com based on feedback from Peter Zijlstra. + merged the two patches + moved some cleanup changes into separate patches + improved the code and commit messages The main change is in 2nd patch. It fixes the time spent in softlockup. Original: [ 168.277520] watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [cat:4865] [ 196.277604] watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [cat:4865] [ 236.277522] watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [cat:4865] ^^^ New: [ 480.372418] watchdog: BUG: soft lockup - CPU#2 stuck for 26s! [cat:4943] [ 508.372359] watchdog: BUG: soft lockup - CPU#2 stuck for 52s! [cat:4943] [ 548.372359] watchdog: BUG: soft lockup - CPU#2 stuck for 89s! [cat:4943] [ 576.372351] watchdog: BUG: soft lockup - CPU#2 stuck for 115s! [cat:4943] ^^^^^ 1st and 3rd patch clean up the code. Petr Mladek (3): watchdog/softlockup: Remove obsolete check of last reported task watchdog/softlockup: Report the overall time of softlockups watchdog/softlockup: Remove logic that tried to prevent repeated reports kernel/watchdog.c | 67 ++++++++++++++++++++++++------------------------------- 1 file changed, 29 insertions(+), 38 deletions(-) -- 2.16.4