[PATCH v7 7/9] sched/core: Support latency priority with sched core

Vincent Guittot
2022-10-28T09:35:51Z

Take into account wakeup_latency_gran() when ordering the cfs threads.

Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
---
kernel/sched/fair.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 9583936ce30c..a7372f80b1ea 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -11439,6 +11439,9 @@ bool cfs_prio_less(struct task_struct *a, struct task_struct *b, bool in_fi)
delta = (s64)(sea->vruntime - seb->vruntime) +
(s64)(cfs_rqb->min_vruntime_fi - cfs_rqa->min_vruntime_fi);

+ /* Take into account latency prio */
+ delta -= wakeup_latency_gran(sea, seb);
+
return delta > 0;
}
#else
--
2.17.1