From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Srivatsa S. Bhat" Subject: Re: mod_timer: list_add corruption: WARNING: CPU: 1 PID: 0 at lib/list_debug.c:33 __list_add+0xbe/0xd0() Date: Fri, 19 Jul 2013 14:38:03 +0530 Message-ID: <51E901F3.8010203@linux.vnet.ibm.com> References: <51E557C0.2060602@linux.vnet.ibm.com> <51E8F759.4060202@linux.vnet.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Cc: "Srivatsa S. Bhat" , Frederic Weisbecker , Thomas Gleixner , Ingo Molnar , "Paul E. McKenney" , netdev@vger.kernel.org To: "linux-kernel@vger.kernel.org" Return-path: In-Reply-To: <51E8F759.4060202@linux.vnet.ibm.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On 07/19/2013 01:52 PM, Srivatsa S. Bhat wrote: > On 07/16/2013 07:55 PM, Srivatsa S. Bhat wrote: >> Hi, >> >> I happened to hit these warnings on an idle system shortly after >> boot. And the machine locked up and sent NMIs to all CPUs, some of >> which have been captured below. >> >> Kernel version: v3.11-rc1 + 3 unrelated local cpufreq patches. >> Options set in .config (which are of interest here): >> >> CONFIG_TICK_ONESHOT=y >> CONFIG_NO_HZ_COMMON=y >> # CONFIG_HZ_PERIODIC is not set >> # CONFIG_NO_HZ_IDLE is not set >> CONFIG_NO_HZ_FULL=y >> CONFIG_NO_HZ_FULL_ALL=y >> CONFIG_NO_HZ=y >> CONFIG_HIGH_RES_TIMERS=y >> >> CONFIG_TREE_RCU=y >> # CONFIG_PREEMPT_RCU is not set >> CONFIG_RCU_STALL_COMMON=y >> CONFIG_CONTEXT_TRACKING=y >> CONFIG_RCU_USER_QS=y >> CONFIG_CONTEXT_TRACKING_FORCE=y >> CONFIG_RCU_FANOUT=64 >> CONFIG_RCU_FANOUT_LEAF=16 >> # CONFIG_RCU_FANOUT_EXACT is not set >> CONFIG_RCU_FAST_NO_HZ=y >> # CONFIG_TREE_RCU_TRACE is not set >> CONFIG_RCU_NOCB_CPU=y >> CONFIG_RCU_NOCB_CPU_ALL=y >> >> > > Today I hit the same warnings, even without NO_HZ_FULL enabled. > I've attached my .config with this mail. > Adding netdev mailing list to CC. I had posted the warnings here: http://marc.info/?l=linux-kernel&m=137398492701587&w=2 Regards, Srivatsa S. Bhat