rcu: Defer rcu_tasks_kthread() creation till first call_rcu_tasks()

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It is expected that many sites will have CONFIG_TASKS_RCU=y, but
will never actually invoke call_rcu_tasks().  For such sites, creating
rcu_tasks_kthread() at boot is wasteful.  This commit therefore defers
creation of this kthread until the time of the first call_rcu_tasks().

This of course means that the first call_rcu_tasks() must be invoked
from process context after the scheduler is fully operational.

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

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Paul E. McKenney 2014-08-04 07:24:21 -07:00

parent 37fe5f0e27

commit 84a8f446ff

1 changed files with 26 additions and 7 deletions

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33

kernel/rcu/update.c

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