rcu: Switch synchronize_sched_expedited() to IPI

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This commit switches synchronize_sched_expedited() from stop_one_cpu_nowait()
to smp_call_function_single(), thus moving from an IPI and a pair of
context switches to an IPI and a single pass through the scheduler.
Of course, if the scheduler actually does decide to switch to a different
task, there will still be a pair of context switches, but there would
likely have been a pair of context switches anyway, just a bit later.

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

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This commit is contained in:

Paul E. McKenney 2015-08-06 16:50:39 -07:00

parent 5b74c45890

commit 6587a23b6b

2 changed files with 20 additions and 15 deletions

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32

kernel/rcu/tree.c

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3

kernel/rcu/tree.h

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