[Crash-utility] ps: improve performance

[qiaonuohan]

Hello Dave，

On 08/20/2014 08:35 AM, Dave Anderson wrote:
> I am currently on vacation and will not be able to fully review this
> patch until I return in September.

I see. I will help review this patch.

P.S.
Some people of fujitsu have subscribed to Crash-utility, but not been
approven yet. Would you please add them to the mail list.

-- 
Regards
Qiao Nuohan