From: Rik van Riel <[email protected]> The timer housekeeping CPU can do tick based sampling for remote CPUs. For now this is the first CPU in the housekeeping_mask.
Eventually we could move to having one timer housekeeping cpu per socket, if needed. Signed-off-by: Rik van Riel <[email protected]> --- include/linux/tick.h | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/include/linux/tick.h b/include/linux/tick.h index f8492da57ad3..2fb51030587b 100644 --- a/include/linux/tick.h +++ b/include/linux/tick.h @@ -158,6 +158,15 @@ static inline bool is_housekeeping_cpu(int cpu) return true; } +static inline bool is_timer_housekeeping_cpu(int cpu) +{ +#ifdef CONFIG_NO_HZ_FULL + if (tick_nohz_full_running) + return (cpumask_first(housekeeping_mask) == cpu); +#endif + return false; +} + static inline void housekeeping_affine(struct task_struct *t) { #ifdef CONFIG_NO_HZ_FULL -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
