• Frederic Weisbecker's avatar
    sched: Kick full dynticks CPU that have more than one task enqueued. · 9f3660c2
    Frederic Weisbecker authored
    Kick the tick on full dynticks CPUs when they get more
    than one task running on their queue. This makes sure that
    local fairness is maintained by the tick on the destination.
    
    This is done regardless of these tasks' class. We should
    be able to be more clever in the future depending on these. eg:
    a CPU that runs a SCHED_FIFO task doesn't need to maintain
    fairness against local pending tasks of the fair class.
    
    But keep things simple for now.
    Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
    Cc: Chris Metcalf <cmetcalf@tilera.com>
    Cc: Christoph Lameter <cl@linux.com>
    Cc: Geoff Levand <geoff@infradead.org>
    Cc: Gilad Ben Yossef <gilad@benyossef.com>
    Cc: Hakan Akkan <hakanakkan@gmail.com>
    Cc: Ingo Molnar <mingo@kernel.org>
    Cc: Kevin Hilman <khilman@linaro.org>
    Cc: Li Zhong <zhong@linux.vnet.ibm.com>
    Cc: Oleg Nesterov <oleg@redhat.com>
    Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
    Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Steven Rostedt <rostedt@goodmis.org>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    9f3660c2
sched.h 36.4 KB