From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754177AbbI3Whr (ORCPT ); Wed, 30 Sep 2015 18:37:47 -0400 Received: from plane.gmane.org ([80.91.229.3]:48771 "EHLO plane.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754993AbbI3Who (ORCPT ); Wed, 30 Sep 2015 18:37:44 -0400 X-Injected-Via-Gmane: http://gmane.org/ To: linux-kernel@vger.kernel.org From: Holger =?iso-8859-1?q?Hoffst=E4tte?= Subject: Re: Soft lockup issue in Linux 4.1.9 Date: Wed, 30 Sep 2015 22:37:34 +0000 (UTC) Message-ID: References: <1443650383.13282.10.camel@daevel.fr> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: p579d0c53.dip0.t-ipconnect.de User-Agent: Pan/0.139 (Sexual Chocolate; GIT bf56508 git://git.gnome.org/pan2) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 30 Sep 2015 23:59:43 +0200, Olivier Bonvalet wrote: > for information, I've just upgraded 6 servers from Linux 4.1.8 to Linux > 4.1.9, and have some random soft lockup. If this can help : Congratulations! You're not the first one to get hit by this, but you are probably the first one to get a meaningful stacktrace! \o/ > [ 204.478380] Call Trace: > [ 204.478381] > [ 204.478385] [] ? try_to_del_timer_sync+0x43/0x4d > [ 204.478386] [] ? del_timer+0x4d/0x4d > [ 204.478388] [] ? del_timer_sync+0x20/0x3d Can you try to revert [PATCH 4.1 157/159] inet: fix races with reqsk timers and see how that works for you? I'll do the same on my end. So far the only thing I ever could gleam was an rcu stall after cpuidle_enter(), but never anything regarding the timer - though it was definitely related to NIC activity after idle. cheers Holger