rcu: Avoid resched_cpu() when rescheduling the current CPU

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The resched_cpu() interface is quite handy, but it does acquire the
specified CPU's runqueue lock, which does not come for free.  This
commit therefore substitutes the following when directing resched_cpu()
at the current CPU:

	set_tsk_need_resched(current);
	set_preempt_need_resched();

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>

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This commit is contained in:

Paul E. McKenney 2018-07-26 13:44:00 -07:00

parent d3052109c0

commit fced9c8cfe

3 changed files with 21 additions and 13 deletions

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11

kernel/rcu/tree.c

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17

kernel/rcu/tree_exp.h

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6

kernel/rcu/tree_plugin.h

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