Hi...

On Wed, Jun 27, 2012 at 12:02 AM, Jacky lin [off-list ref] wrote:

I check the code, and find the LR is point to smp_cross_call()

void arch_send_call_function_single_ipi(int cpu)
{
??? smp_cross_call(cpumask_of(cpu), IPI_CALL_FUNC_SINGLE);
}

from what I know, IPI (Inter Processor Call) is usually used to do
things like cache snooping. It's like inter processor cache
invalidation...

-- 
regards,

Mulyadi Santosa
Freelance Linux trainer and consultant

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