Re: [PATCH RT] tracing: make preempt_lazy and migrate_disable counter smaller

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On Fri, 21 Feb 2020 18:44:19 +0100
Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx> wrote:

> diff --git a/include/linux/trace_events.h b/include/linux/trace_events.h
> index f3b1ef07e4a5f..c8b3f06cb5ed7 100644
> --- a/include/linux/trace_events.h
> +++ b/include/linux/trace_events.h
> @@ -62,9 +62,9 @@ struct trace_entry {
>  	unsigned char		flags;
>  	unsigned char		preempt_count;
>  	int			pid;
> -	unsigned short		migrate_disable;
> -	unsigned short		padding;
> +	unsigned char		migrate_disable;
>  	unsigned char		preempt_lazy_count;
> +	unsigned short		padding;
>  };

Do we really need the padding here?

-- Steve



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