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| author |   Paul E. McKenney <paulmck@kernel.org> | 2020-03-17 08:57:02 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2020-04-27 11:03:52 -0700 |
| commit | 88092d0c99d7584d50cc8caadb8fa9ff8a1d4ea0 (patch) | |
| tree | 90ea681eed768a5f7eef4ff72f57637d9406f03c /kernel/rcu | |
| parent | rcu-tasks: Make RCU Tasks Trace make use of RCU scheduler hooks (diff) | |
| download | linux-dev-88092d0c99d7584d50cc8caadb8fa9ff8a1d4ea0.tar.xz linux-dev-88092d0c99d7584d50cc8caadb8fa9ff8a1d4ea0.zip | |
rcu-tasks: Add a grace-period start time for throttling and debug
This commit adds a place to record the grace-period start in jiffies.
This will be used by later commits for debugging purposes and to throttle
IPIs early in the grace period.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel/rcu')
| -rw-r--r-- | kernel/rcu/tasks.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/rcu/tasks.h b/kernel/rcu/tasks.h index 6f8a4040fbdd..71462cf3d4bd 100644 --- a/kernel/rcu/tasks.h +++ b/kernel/rcu/tasks.h @@ -46,6 +46,7 @@ struct rcu_tasks { raw_spinlock_t cbs_lock; int gp_state; unsigned long gp_jiffies; + unsigned long gp_start; struct task_struct *kthread_ptr; rcu_tasks_gp_func_t gp_func; pregp_func_t pregp_func; @@ -200,6 +201,7 @@ static int __noreturn rcu_tasks_kthread(void *arg) // Wait for one grace period. set_tasks_gp_state(rtp, RTGS_WAIT_GP); + rtp->gp_start = jiffies; rtp->gp_func(rtp); /* Invoke the callbacks. */ |