linux-kernel - [tip:sched/core] sched: Preserve the nice level over sched_setscheduler() and sched

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Date:	Thu, 16 Jan 2014 05:40:21 -0800
From:	tip-bot for Peter Zijlstra <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org,
	peterz@...radead.org, wangyun@...ux.vnet.ibm.com,
	tglx@...utronix.de, daniel.lezcano@...aro.org
Subject: [tip:sched/core] sched:
  Preserve the nice level over sched_setscheduler() and sched_setparam()
  calls

Commit-ID:  e3de300d1212b42aa9d0d6031b12fca06ac00dd9
Gitweb:     http://git.kernel.org/tip/e3de300d1212b42aa9d0d6031b12fca06ac00dd9
Author:     Peter Zijlstra <peterz@...radead.org>
AuthorDate: Wed, 15 Jan 2014 12:30:15 +0100
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Thu, 16 Jan 2014 09:27:14 +0100

sched: Preserve the nice level over sched_setscheduler() and sched_setparam() calls

Previously sched_setscheduler() and sched_setparam() would not affect
the nice value of a task, restore this behaviour.

Signed-off-by: Peter Zijlstra <peterz@...radead.org>
Cc: raistlin@...ux.it
Cc: juri.lelli@...il.com
Cc: Michael wang <wangyun@...ux.vnet.ibm.com>
Cc: Daniel Lezcano <daniel.lezcano@...aro.org>
Fixes: d50dde5a10f3 ("sched: Add new scheduler syscalls to support an extended scheduling parameters ABI")
Link: http://lkml.kernel.org/r/20140115113015.GB31570@twins.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 kernel/sched/core.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 26af370..c1b3d7e 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -3451,7 +3451,8 @@ int sched_setscheduler(struct task_struct *p, int policy,
 {
 	struct sched_attr attr = {
 		.sched_policy   = policy,
-		.sched_priority = param->sched_priority
+		.sched_priority = param->sched_priority,
+		.sched_nice	= PRIO_TO_NICE(p->static_prio),
 	};
 	return __sched_setscheduler(p, &attr, true);
 }
@@ -3481,7 +3482,8 @@ int sched_setscheduler_nocheck(struct task_struct *p, int policy,
 {
 	struct sched_attr attr = {
 		.sched_policy   = policy,
-		.sched_priority = param->sched_priority
+		.sched_priority = param->sched_priority,
+		.sched_nice	= PRIO_TO_NICE(p->static_prio),
 	};
 	return __sched_setscheduler(p, &attr, false);
 }
--
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