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| author | Paul E. McKenney <paulmck@linux.ibm.com> | 2018-11-30 16:11:14 -0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.ibm.com> | 2019-01-25 15:29:53 -0800 |
| commit | 37f62d7cf00c085e1d7a91a6af286c4e8d32e1e1 (patch) | |
| tree | 9e16f2b9587d5566f976803263bed1b5374ed88b /kernel/rcu/tree.h | |
| parent | 9cf422a8e71455032b61c6c0ea56a1e96206aab0 (diff) | |
| download | lwn-37f62d7cf00c085e1d7a91a6af286c4e8d32e1e1.tar.gz lwn-37f62d7cf00c085e1d7a91a6af286c4e8d32e1e1.zip | |
rcu: Move rcu_cpu_kthread_task to rcu_data structure
Given that RCU has a perfectly good per-CPU rcu_data structure, most
per-CPU quantities should be stored there.
This commit therefore moves the rcu_cpu_kthread_task per-CPU variable to
the rcu_data structure. This also makes this variable unconditionally
present, which should be acceptable given the memory reduction due to the
RCU flavor consolidation and also due to simplifications this will enable.
Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>
Diffstat (limited to 'kernel/rcu/tree.h')
| -rw-r--r-- | kernel/rcu/tree.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h index d90b02b53c0e..ef517ba25192 100644 --- a/kernel/rcu/tree.h +++ b/kernel/rcu/tree.h @@ -234,7 +234,11 @@ struct rcu_data { /* Leader CPU takes GP-end wakeups. */ #endif /* #ifdef CONFIG_RCU_NOCB_CPU */ - /* 6) Diagnostic data, including RCU CPU stall warnings. */ + /* 6) RCU priority boosting. */ + struct task_struct *rcu_cpu_kthread_task; + /* rcuc per-CPU kthread or NULL. */ + + /* 7) Diagnostic data, including RCU CPU stall warnings. */ unsigned int softirq_snap; /* Snapshot of softirq activity. */ /* ->rcu_iw* fields protected by leaf rcu_node ->lock. */ struct irq_work rcu_iw; /* Check for non-irq activity. */ |