Re: mod_timer: list_add corruption: WARNING: CPU: 1 PID: 0 at lib/list_debug.c:33 __list_add+0xbe/0xd0()

On 07/19/2013 01:52 PM, Srivatsa S. Bhat wrote:

On 07/16/2013 07:55 PM, Srivatsa S. Bhat wrote:

quoted

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