Re: [RFC PATCH 3/3 -v2] x86,smp: auto tune spinlock backoff delayfactor

[Eric Dumazet]

On Fri, 2012-12-21 at 18:56 -0500, Rik van Riel wrote:
> +	int *delay_ptr = &per_cpu(spinlock_delay, smp_processor_id());
> +	int delay = *delay_ptr;

int delay = __this_cpu_read(spinlock_delay);

>  	}
> +	*delay_ptr = delay;

__this_cpu_write(spinlock_delay, delay);


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