linux-kernel - Re: mod_timer: list_add corruption: WARNING: CPU: 1 PID: 0 at lib/list_debug.c:33 __list

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Message-ID: <51E8F759.4060202@linux.vnet.ibm.com>
Date:	Fri, 19 Jul 2013 13:52:49 +0530
From:	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>
To:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...nel.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Subject: Re: mod_timer: list_add corruption: WARNING: CPU: 1 PID: 0 at lib/list_debug.c:33
 __list_add+0xbe/0xd0()

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.

Regards,
Srivatsa S. Bhat


View attachment "config" of type "text/plain" (97689 bytes)