linux-kernel - [PATCH 14/14] resource limits: track highwater mark of RT priority

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Message-Id: <1468578983-28229-15-git-send-email-toiwoton@gmail.com>
Date:	Fri, 15 Jul 2016 13:36:01 +0300
From:	Topi Miettinen <toiwoton@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Topi Miettinen <toiwoton@...il.com>,
	Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>
Subject: [PATCH 14/14] resource limits: track highwater mark of RT priority

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

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

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index da32bcd..bb08b43 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -4221,6 +4221,9 @@ change:
 	balance_callback(rq);
 	preempt_enable();
 
+	task_update_resource_highwatermark(p, RLIMIT_RTPRIO,
+					   attr->sched_priority);
+
 	return 0;
 }
 
-- 
2.8.1