Re: [PATCH v2] mempolicy: reduce references to the current

[KOSAKI Motohiro]

> Remove duplicated reference to the 'current' task using a local
> variable. Since refering the current can be a burden, it'd better
> cache the reference, IMHO. At least this saves some bytes on x86_64.
> 
>   $ size mempolicy-{old,new}.o
>      text    data    bss     dec     hex filename
>     25203    2448   9176   36827    8fdb mempolicy-old.o
>     25136    2448   9184   36768    8fa0 mempolicy-new.o
> 
> Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxx>

But, dense stack usage is also performance good thing. Therefore your
patch benefit is not obvious. I have two request.

1) Please don't increase mess into no hot path. It's no worth.
2) Please mesure performance your box instead size command.

thanks.


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