rcu: Add fastpath bypassing funnel locking

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In the common case, there will be only one expedited grace period in
the system at a given time, in which case it is not helpful to use
funnel locking.  This commit therefore adds a fastpath that bypasses
funnel locking when the root ->exp_funnel_mutex is not held.

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

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This commit is contained in:

Paul E. McKenney 2015-07-11 16:24:45 -07:00

parent 32bb1c7999

commit cdacbe1f91

4 changed files with 29 additions and 29 deletions

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36

Documentation/RCU/trace.txt

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16

kernel/rcu/tree.c

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2

kernel/rcu/tree.h

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4

kernel/rcu/tree_trace.c

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