From: Rik van Riel <[email protected]> Teach account_process_tick to work on the CPU of the task specified in the function argument. This allows us to do remote tick based sampling of a nohz_full cpu from a housekeeping CPU.
Signed-off-by: Rik van Riel <[email protected]> --- kernel/sched/cputime.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/kernel/sched/cputime.c b/kernel/sched/cputime.c index 8394b1ee600c..97077c282626 100644 --- a/kernel/sched/cputime.c +++ b/kernel/sched/cputime.c @@ -463,8 +463,14 @@ void thread_group_cputime_adjusted(struct task_struct *p, cputime_t *ut, cputime void account_process_tick(struct task_struct *p, int user_tick) { cputime_t one_jiffy_scaled = cputime_to_scaled(cputime_one_jiffy); - struct rq *rq = this_rq(); + int cpu = task_cpu(p); + struct rq *rq = cpu_rq(cpu); + /* + * Tests current CPU, not "cpu", to see whether account_process_tick() + * should do work on this invocation, or whether time keeping for + * this CPU is done in some other way. + */ if (vtime_accounting_enabled()) return; -- 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/
