Commit cc72046c authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

rcu: Merge rcu_dynticks structure into rcu_data structure 



Now that there is only ever one rcu_data structure per CPU, there is no
need for a separate rcu_dynticks structure.  This commit therefore adds
the rcu_dynticks fields into the rcu_data structure in preparation for
removing the rcu_dynticks structure entirely.  Note that the ->dynticks
field will be handled specially because there is a field by that name
in both structures.

Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
parent 31ab604b

kernel/rcu/tree.h

+17 −0
Original line number Diff line number Diff line
@@ -212,6 +212,23 @@ struct rcu_data { 
	/* 3) dynticks interface. */

	struct rcu_dynticks *dynticks;	/* Shared per-CPU dynticks state. */

	int dynticks_snap;		/* Per-GP tracking for dynticks. */

	long dynticks_nesting;      /* Track process nesting level. */

	long dynticks_nmi_nesting;  /* Track irq/NMI nesting level. */

	// atomic_t dynticks;	    /* Even value for idle, else odd. */

	bool rcu_need_heavy_qs;     /* GP old, need heavy quiescent state. */

	bool rcu_urgent_qs;	    /* GP old need light quiescent state. */

#ifdef CONFIG_RCU_FAST_NO_HZ

	bool all_lazy;		    /* Are all CPU's CBs lazy? */

	unsigned long nonlazy_posted;

				    /* # times non-lazy CBs posted to CPU. */

	unsigned long nonlazy_posted_snap;

				    /* idle-period nonlazy_posted snapshot. */

	unsigned long last_accelerate;

				    /* Last jiffy CBs were accelerated. */

	unsigned long last_advance_all;

				    /* Last jiffy CBs were all advanced. */

	int tick_nohz_enabled_snap; /* Previously seen value from sysfs. */

#endif /* #ifdef CONFIG_RCU_FAST_NO_HZ */



	/* 4) reasons this CPU needed to be kicked by force_quiescent_state */

	unsigned long dynticks_fqs;	/* Kicked due to dynticks idle. */

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