Re: [PATCH] sched/isolation: delete redundant housekeeping_overridden check

[Steven Rostedt]

On Tue, 23 Nov 2021 15:45:35 +0800
Aili Yao <yaoaili126@xxxxxxxxx> wrote:

> From: Aili Yao <yaoaili@xxxxxxxxxxxx>
> 
> housekeeping_test_cpu is only called by housekeeping_cpu(),
> and in housekeeping_cpu(), there is already one same check;
> 
> So delete the redundant check.
> 
> Signed-off-by: Aili Yao <yaoaili@xxxxxxxxxxxx>
> ---
>  kernel/sched/isolation.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/kernel/sched/isolation.c b/kernel/sched/isolation.c
> index 7f06eaf..5c4d533 100644
> --- a/kernel/sched/isolation.c
> +++ b/kernel/sched/isolation.c
> @@ -56,9 +56,8 @@ void housekeeping_affine(struct task_struct *t, enum
> hk_flags flags) 
>  bool housekeeping_test_cpu(int cpu, enum hk_flags flags)
>  {
> -	if (static_branch_unlikely(&housekeeping_overridden))
> -		if (housekeeping_flags & flags)
> -			return cpumask_test_cpu(cpu,
> housekeeping_mask);

Not only is your email client broken, you don't seem to understand what
static_branch_unlikely() is.

NACK.

-- Steve


> +	if (housekeeping_flags & flags)
> +		return cpumask_test_cpu(cpu, housekeeping_mask);
>  	return true;
>  }
>  EXPORT_SYMBOL_GPL(housekeeping_test_cpu);