• Thomas Gleixner's avatar
    timers: Forward the wheel clock whenever possible · a683f390
    Thomas Gleixner authored
    The wheel clock is stale when a CPU goes into a long idle sleep. This has the
    side effect that timers which are queued end up in the outer wheel levels.
    That results in coarser granularity.
    To solve this, we keep track of the idle state and forward the wheel clock
    whenever possible.
    Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
    Cc: Arjan van de Ven <arjan@infradead.org>
    Cc: Chris Mason <clm@fb.com>
    Cc: Eric Dumazet <edumazet@google.com>
    Cc: Frederic Weisbecker <fweisbec@gmail.com>
    Cc: George Spelvin <linux@sciencehorizons.net>
    Cc: Josh Triplett <josh@joshtriplett.org>
    Cc: Len Brown <lenb@kernel.org>
    Cc: Linus Torvalds <torvalds@linux-foundation.org>
    Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Rik van Riel <riel@redhat.com>
    Cc: rt@linutronix.de
    Link: http://lkml.kernel.org/r/20160704094342.512039360@linutronix.deSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
tick-internal.h 7 KB