rcu: Make expedited grace period use direct call on last leaf

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During expedited grace-period initialization, a work item is scheduled
for each leaf rcu_node structure.  However, that initialization code
is itself (normally) executing from a workqueue, so one of the leaf
rcu_node structures could just as well be handled by that pre-existing
workqueue, and with less overhead.  This commit therefore uses a
shiny new rcu_is_leaf_node() macro to execute the last leaf rcu_node
structure's initialization directly from the pre-existing workqueue.

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

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This commit is contained in:

Paul E. McKenney 2018-04-24 11:03:39 -07:00

parent ce397d215c

commit 5257514d88

2 changed files with 6 additions and 2 deletions

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3

kernel/rcu/rcu.h

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5

kernel/rcu/tree_exp.h

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