tree 563ac794fdc576d07303c65058472900f0dfa848
parent 49c30034869799bcfceaebb8fc6cf492609c5378
author Paul E. McKenney <paul.mckenney@linaro.org> 1338867910 -0700
committer Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1339040792 -0700

rcu: Round FAST_NO_HZ lazy timeout to nearest second

Currently, if several CPUs in the same package have all lazy RCU
callbacks, their wakeups will be uncorrelated.  If all the CPUs are in the
same power domain (as is often the case), this will result in unnecessary
power-ups of the package.  This commit therefore uses round_jiffies()
to round the timeouts to a second boundary, increasing the odds that
they can be coalesced with each other or with other timeouts.

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