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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2014-03-12 07:10:41 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2014-05-14 09:46:09 -0700 |
| commit | afea227fd4acf4f097a9e77bbc2f07d4856ebd01 (patch) | |
| tree | 9dfd0074fb7d95551701927bac86aa30670dcd43 /kernel/rcu/tree.h | |
| parent | 945fa9c631b04febe295a3a2a00c7e4a3cfb97db (diff) | |
| download | blackbird-obmc-linux-afea227fd4acf4f097a9e77bbc2f07d4856ebd01.tar.gz blackbird-obmc-linux-afea227fd4acf4f097a9e77bbc2f07d4856ebd01.zip | |
rcutorture: Export RCU grace-period kthread wait state to rcutorture
This commit allows rcutorture to print additional state for the
RCU grace-period kthreads in cases where RCU seems reluctant to
start a new grace period.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Diffstat (limited to 'kernel/rcu/tree.h')
| -rw-r--r-- | kernel/rcu/tree.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h index 75dc3c39a02a..c2fd1e722879 100644 --- a/kernel/rcu/tree.h +++ b/kernel/rcu/tree.h @@ -406,7 +406,8 @@ struct rcu_state { unsigned long completed; /* # of last completed gp. */ struct task_struct *gp_kthread; /* Task for grace periods. */ wait_queue_head_t gp_wq; /* Where GP task waits. */ - int gp_flags; /* Commands for GP task. */ + short gp_flags; /* Commands for GP task. */ + short gp_state; /* GP kthread sleep state. */ /* End of fields guarded by root rcu_node's lock. */ @@ -469,6 +470,11 @@ struct rcu_state { #define RCU_GP_FLAG_INIT 0x1 /* Need grace-period initialization. */ #define RCU_GP_FLAG_FQS 0x2 /* Need grace-period quiescent-state forcing. */ +/* Values for rcu_state structure's gp_flags field. */ +#define RCU_GP_WAIT_INIT 0 /* Initial state. */ +#define RCU_GP_WAIT_GPS 1 /* Wait for grace-period start. */ +#define RCU_GP_WAIT_FQS 2 /* Wait for force-quiescent-state time. */ + extern struct list_head rcu_struct_flavors; /* Sequence through rcu_state structures for each RCU flavor. */ |
