Re: [PATCH RESEND] sched_rt: don't start timer when rt bandwidthdisabled

[Peter Zijlstra]

Right, thanks for the reminder.

On Wed, 2009-02-25 at 09:59 -0800, Hiroshi Shimamoto wrote:
> From: Hiroshi Shimamoto <h-shimamoto@xxxxxxxxxxxxx>
> 
> Impact: fix incorrect condition check
> 
> No need to start rt bandwidth timer when rt bandwidth is disabled.
> If this timer starts, it may stop at sched_rt_period_timer() on the first time.
> 
> Signed-off-by: Hiroshi Shimamoto <h-shimamoto@xxxxxxxxxxxxx>

Yep, looks like a good catch, thanks!

> ---
>  kernel/sched.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/kernel/sched.c b/kernel/sched.c
> index 4484f9c..9e49ac8 100644
> --- a/kernel/sched.c
> +++ b/kernel/sched.c
> @@ -223,7 +223,7 @@ static void start_rt_bandwidth(struct rt_bandwidth *rt_b)
>  {
>  	ktime_t now;
>  
> -	if (rt_bandwidth_enabled() && rt_b->rt_runtime == RUNTIME_INF)
> +	if (!rt_bandwidth_enabled() || rt_b->rt_runtime == RUNTIME_INF)
>  		return;
>  
>  	if (hrtimer_active(&rt_b->rt_period_timer))

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