rcu: Make expedited RCU-sched grace period immediately detect idle

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Currently, sync_sched_exp_handler() will force a reschedule unless
this CPU has already checked in or unless a reschedule has already
been called for.  This is clearly wasteful if sync_sched_exp_handler()
interrupted an idle CPU, so this commit immediately reports the
quiescent state in that case.

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

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Paul E. McKenney 2016-01-12 08:33:37 -08:00

parent 274529ba9b

commit 28728dd310

1 changed files with 5 additions and 0 deletions

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kernel/rcu/tree.c

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