Track maximum nice priority, to be able to configure
RLIMIT_NICE resource limits. The information is available
with taskstats and cgroupstats netlink socket.

Signed-off-by: Topi Miettinen <toiwo...@gmail.com>
---
 kernel/sched/core.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 97ee9ac..da32bcd 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -3693,6 +3693,9 @@ void set_user_nice(struct task_struct *p, long nice)
                if (delta < 0 || (delta > 0 && task_running(rq, p)))
                        resched_curr(rq);
        }
+       task_update_resource_highwatermark(p, RLIMIT_NICE,
+                                          nice_to_rlimit(nice));
+
 out_unlock:
        task_rq_unlock(rq, p, &rf);
 }
-- 
2.8.1

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