On 01/13/2010 02:49 PM, Suresh Siddha wrote:
> On Wed, 2010-01-13 at 14:36 -0800, H. Peter Anvin wrote:
>> On 01/13/2010 02:29 PM, Suresh Siddha wrote:
>>>>
>>>> Well, that *is* working around broken code, in this case the broken code
>>>> is the percpu allocation strategy.
>>>
>>> Andi, Recently percpu folks changed the per-cpu static first chunk to
>>> PMD SIZE right. I think that is what causing all this issue.
>>>
>>
>> Please don't tell me we're allocating 2 MB per CPU and throwing away
>> most of it...
> 
> Looking at the percpu code, they do seem to free the unused memory in
> that hole.
> 
> Yinghai, what are the configurations that need MB's of per cpu area?

please check attached...

YH