[RFC][PATCH] sched: take rt_rq->rt_runtime_lock around rt_rq->rt_runtimemodification

[Jesper Juhl]

Everywhere (that I could find) where we modify rt_rq->rt_runtime we hold 
rt_rq->rt_runtime_lock except in alloc_rt_sched_group(). Shouldn't we do 
so - as per this patch. ???

Signed-off-by: Jesper Juhl <jj@xxxxxxxxxxxxx>
---
 kernel/sched.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/kernel/sched.c b/kernel/sched.c
index ccacdbd..d5a3737 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -8488,7 +8488,9 @@ int alloc_rt_sched_group(struct task_group *tg, struct task_group *parent)
 			goto err_free_rq;
 
 		init_rt_rq(rt_rq, cpu_rq(i));
+		raw_spin_lock(&rt_rq->rt_runtime_lock);
 		rt_rq->rt_runtime = tg->rt_bandwidth.rt_runtime;
+		raw_spin_unlock(&rt_rq->rt_runtime_lock);
 		init_tg_rt_entry(tg, rt_rq, rt_se, i, parent->rt_se[i]);
 	}
 
-- 
1.7.6


-- 
Jesper Juhl <jj@xxxxxxxxxxxxx>       http://www.chaosbits.net/
Don't top-post http://www.catb.org/jargon/html/T/top-post.html
Plain text mails only, please.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/