Re: [RFC PATCH 0/5] Support multiple pages allocation

[Zhang Yanfei]

On 07/03/2013 11:51 PM, Zhang Yanfei wrote:
> On 07/03/2013 11:28 PM, Michal Hocko wrote:
>> On Wed 03-07-13 17:34:15, Joonsoo Kim wrote:
>> [...]
>>> For one page allocation at once, this patchset makes allocator slower than
>>> before (-5%). 
>>
>> Slowing down the most used path is a no-go. Where does this slow down
>> come from?
> 
> I guess, it might be: for one page allocation at once, comparing to the original
> code, this patch adds two parameters nr_pages and pages and will do extra checks
> for the parameter nr_pages in the allocation path.
> 

If so, adding a separate path for the multiple allocations seems better.

>>
>> [...]
> 
> 


-- 
Thanks.
Zhang Yanfei
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