diff mbox series

[v8,7/9] sched/core: Support latency priority with sched core

Message ID 20221110175009.18458-8-vincent.guittot@linaro.org
State New
Headers
Series [v8,1/9] sched/fair: fix unfairness at wakeup |

Commit Message

Vincent Guittot Nov. 10, 2022, 5:50 p.m. UTC 
  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 mbox series

Patch

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