Re: [PATCH] RFC x86_64 more accurate KSTK_ESP implementation

[H. Peter Anvin]

On 11/08/2009 06:00 AM, Stefani Seibold wrote:
> Am Sonntag, den 08.11.2009, 13:55 +0100 schrieb Ingo Molnar:
>> * Stefani Seibold <stefani@xxxxxxxxxxx> wrote:
>>
>>>> I'd suggest a competely different method: why dont you use an IPI to 
>>>> sample the SP whenever someone wants to read it from /proc and we 
>>>> see that the task is running on a CPU right now?
>>>
>>> Sounds like a challenge, i like the idea. I will have a look on it...
>>
>> It's not a fastpath, so smp_function_call() ought to do the trick.
> 
> There is no function smp_function_call()...
> 

smp_call_function().

	-hpa


-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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