Re: [PATCH tip/core/rcu 0/9] sysidle changes for v3.12

2013-08-17 Thread Josh Triplett
On Sat, Aug 17, 2013 at 06:49:18PM -0700, Paul E. McKenney wrote: > Hello! > > Whenever there is at least one non-idle CPU, it is necessary to > periodically update timekeeping information. Before NO_HZ_FULL, this > updating was carried out by the scheduling-clock tick, which ran on > every non-i

[PATCH tip/core/rcu 0/9] sysidle changes for v3.12

2013-08-17 Thread Paul E. McKenney
Hello! Whenever there is at least one non-idle CPU, it is necessary to periodically update timekeeping information. Before NO_HZ_FULL, this updating was carried out by the scheduling-clock tick, which ran on every non-idle CPU. With the advent of NO_HZ_FULL, it is possible to have non-idle CPUs