rcu: Update cpu_needs_another_gp() for futures from non-NOCB CPUs

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In the old days, the only source of requests for future grace periods
was NOCB CPUs.  This has changed: CPUs routinely post requests for
future grace periods in order to promote power efficiency and reduce
OS jitter with minimal impact on grace-period latency.  This commit
therefore updates cpu_needs_another_gp() to invoke rcu_future_needs_gp()
instead of rcu_nocb_needs_gp().  The latter is no longer used, so is
now removed.  This commit also adds tracing for the irq_work_queue()
wakeup case.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>

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This commit is contained in:

Paul E. McKenney 2014-03-10 10:55:52 -07:00

parent 83ebe63ead

commit 365187fbc0

3 changed files with 29 additions and 29 deletions

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39

kernel/rcu/tree.c

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1

kernel/rcu/tree.h

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18

kernel/rcu/tree_plugin.h

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