rcu: Extend expedited funnel locking to rcu_data structure

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The strictly rcu_node based funnel-locking scheme works well in many
cases, but systems with CONFIG_RCU_FANOUT_LEAF=64 won't necessarily get
all that much concurrency.  This commit therefore extends the funnel
locking into the per-CPU rcu_data structure, providing concurrency equal
to the number of CPUs.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

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Paul E. McKenney 2015-06-29 17:06:39 -07:00

parent 704dd435ac

commit 2cd6ffafec

3 changed files with 21 additions and 5 deletions

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19

kernel/rcu/tree.c

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4

kernel/rcu/tree.h

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3

kernel/rcu/tree_trace.c

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