diff options
| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2014-12-08 09:57:48 -0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2015-01-06 11:05:25 -0800 |
| commit | fc908ed33e7c1428f799abb12399f906da03b397 (patch) | |
| tree | 329342ea2dd85f88d6dae001790d5912342fd005 /kernel/rcu/tree.h | |
| parent | e9408e4f278875aa5862560b4b425b27dfcb643f (diff) | |
rcu: Make RCU_CPU_STALL_INFO include number of fqs attempts
One way that an RCU CPU stall warning can happen is if the grace-period
kthread is not allowed to execute. One proxy for this kthread's
forward progress is the number of force-quiescent-state (fqs) scans.
This commit therefore adds the number of fqs scans to the RCU CPU stall
warning printouts when CONFIG_RCU_CPU_STALL_INFO=y.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcu/tree.h')
| -rw-r--r-- | kernel/rcu/tree.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h index 8e7b1843896e..e300848cc0cf 100644 --- a/kernel/rcu/tree.h +++ b/kernel/rcu/tree.h @@ -492,6 +492,8 @@ struct rcu_state { /* for CPU stalls. */ unsigned long jiffies_resched; /* Time at which to resched */ /* a reluctant CPU. */ + unsigned long n_force_qs_gpstart; /* Snapshot of n_force_qs at */ + /* GP start. */ unsigned long gp_max; /* Maximum GP duration in */ /* jiffies. */ const char *name; /* Name of structure. */ |