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Merge "rcu: Create RCU-specific workqueues with rescuers" into msm-4.14

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Linux Build Service Account 2018-04-16 18:09:19 -07:00 committed by Gerrit - the friendly Code Review server
commit f009d33da2
4 changed files with 11 additions and 6 deletions
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1
kernel/rcu/rcu.h
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@ -474,6 +474,7 @@ void show_rcu_gp_kthreads(void);
void rcu_force_quiescent_state(void);
void rcu_bh_force_quiescent_state(void);
void rcu_sched_force_quiescent_state(void);
extern struct workqueue_struct *rcu_gp_wq;
#endif /* #else #ifdef CONFIG_TINY_RCU */
#ifdef CONFIG_RCU_NOCB_CPU

8
kernel/rcu/srcutree.c
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@ -465,8 +465,7 @@ static bool srcu_queue_delayed_work_on(int cpu, struct workqueue_struct *wq,
*/
static void srcu_schedule_cbs_sdp(struct srcu_data *sdp, unsigned long delay)
{
srcu_queue_delayed_work_on(sdp->cpu, system_power_efficient_wq,
&sdp->work, delay);
srcu_queue_delayed_work_on(sdp->cpu, rcu_gp_wq, &sdp->work, delay);
}
/*
@ -664,8 +663,7 @@ static void srcu_funnel_gp_start(struct srcu_struct *sp, struct srcu_data *sdp,
rcu_seq_state(sp->srcu_gp_seq) == SRCU_STATE_IDLE) {
WARN_ON_ONCE(ULONG_CMP_GE(sp->srcu_gp_seq, sp->srcu_gp_seq_needed));
srcu_gp_start(sp);
queue_delayed_work(system_power_efficient_wq, &sp->work,
srcu_get_delay(sp));
queue_delayed_work(rcu_gp_wq, &sp->work, srcu_get_delay(sp));
}
raw_spin_unlock_irqrestore_rcu_node(sp, flags);
}
@ -1198,7 +1196,7 @@ static void srcu_reschedule(struct srcu_struct *sp, unsigned long delay)
raw_spin_unlock_irq_rcu_node(sp);
if (pushgp)
queue_delayed_work(system_power_efficient_wq, &sp->work, delay);
queue_delayed_work(rcu_gp_wq, &sp->work, delay);
}
/*

6
kernel/rcu/tree.c
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@ -4176,6 +4176,8 @@ static void __init rcu_dump_rcu_node_tree(struct rcu_state *rsp)
pr_cont("\n");
}
struct workqueue_struct *rcu_gp_wq;
void __init rcu_init(void)
{
int cpu;
@ -4203,6 +4205,10 @@ void __init rcu_init(void)
if (IS_ENABLED(CONFIG_TREE_SRCU))
srcu_online_cpu(cpu);
}
/* Create workqueue for expedited GPs and for Tree SRCU. */
rcu_gp_wq = alloc_workqueue("rcu_gp", WQ_MEM_RECLAIM, 0);
WARN_ON(!rcu_gp_wq);
}
#include "tree_exp.h"

2
kernel/rcu/tree_exp.h
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@ -606,7 +606,7 @@ static void _synchronize_rcu_expedited(struct rcu_state *rsp,
rew.rew_rsp = rsp;
rew.rew_s = s;
INIT_WORK_ONSTACK(&rew.rew_work, wait_rcu_exp_gp);
schedule_work(&rew.rew_work);
queue_work(rcu_gp_wq, &rew.rew_work);
}
/* Wait for expedited grace period to complete. */