lkml.org 
[lkml]   [2014]   [Feb]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[tip:sched/core] sched: Adjust p-> sched_reset_on_fork when nothing else changes
Commit-ID:  d6b1e9119787fd2e31dcf0f0ce90b71197604206
Gitweb: http://git.kernel.org/tip/d6b1e9119787fd2e31dcf0f0ce90b71197604206
Author: Thomas Gleixner <tglx@linutronix.de>
AuthorDate: Fri, 7 Feb 2014 20:58:40 +0100
Committer: Ingo Molnar <mingo@kernel.org>
CommitDate: Sat, 22 Feb 2014 18:08:43 +0100

sched: Adjust p->sched_reset_on_fork when nothing else changes

If the policy and priority remain unchanged a possible modification of
p->sched_reset_on_fork gets lost in the early exit path.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
[ Rebase ontop of v3.14-rc1. ]
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1391803122-4425-5-git-send-email-bigeasy@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
kernel/sched/core.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index c94e851..771eb87 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -3362,7 +3362,8 @@ recheck:
}

/*
- * If not changing anything there's no need to proceed further:
+ * If not changing anything there's no need to proceed further,
+ * but store a possible modification of reset_on_fork.
*/
if (unlikely(policy == p->policy)) {
if (fair_policy(policy) && attr->sched_nice != task_nice(p))
@@ -3372,6 +3373,7 @@ recheck:
if (dl_policy(policy))
goto change;

+ p->sched_reset_on_fork = reset_on_fork;
task_rq_unlock(rq, p, &flags);
return 0;
}

\
 
 \ /
  Last update: 2014-02-22 20:01    [W:0.184 / U:0.876 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site