[PATCH v11 7/8] sched/core: Support latency priority with sched core

[Vincent Guittot]

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

Signed-off-by: Vincent Guittot <vincent.guittot@xxxxxxxxxx>
Tested-by: K Prateek Nayak <kprateek.nayak@xxxxxxx>
---
 kernel/sched/fair.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index dc7570f43ebe..125a6ff53378 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -11949,6 +11949,9 @@ bool cfs_prio_less(const struct task_struct *a, const struct task_struct *b,
 	delta = (s64)(sea->vruntime - seb->vruntime) +
 		(s64)(cfs_rqb->min_vruntime_fi - cfs_rqa->min_vruntime_fi);
 
+	/* Take into account latency offset */
+	delta -= wakeup_latency_gran(sea, seb);
+
 	return delta > 0;
 }
 #else
-- 
2.34.1