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(parent: 2fdbb31) | patch
rcu: Make RCU_FAST_NO_HZ use timer rather than hrtimer
authorPaul E. McKenney <paul.mckenney@linaro.org>
Fri, 24 Feb 2012 01:13:19 +0000 (17:13 -0800)
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Wed, 25 Apr 2012 03:55:19 +0000 (20:55 -0700)
commit2ee3dc80660ac8285a37e662fd91b2e45c46f06a
treed6fcd186eabf672b7bc54bd2f04f1f7956f8afe1tree
parent2fdbb31b662787f78bb78b3e4e18f1a072058ffccommit | diff
rcu: Make RCU_FAST_NO_HZ use timer rather than hrtimer

The RCU_FAST_NO_HZ facility uses an hrtimer to wake up a CPU when
it is allowed to go into dyntick-idle mode, which is almost always
cancelled soon after.  This is not what hrtimers are good at, so
this commit switches to the timer wheel.

Reported-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
kernel/rcutree_plugin.h diff | blob | history
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