Re: [MM] Make mm counters per cpu instead of atomic V2

[KAMEZAWA Hiroyuki]

Christoph Lameter wrote:
> On Sat, 7 Nov 2009, KAMEZAWA Hiroyuki wrote:
>
>> And allocate mm->usage only when the first CLONE_THREAD is specified.
>
> Ok.
>
>> if (mm->usage)
>>     access per cpu
>> else
>>     atomic_long_xxx
>
> If we just have one thread: Do we need atomic access at all?
>
Unfortunately, kswapd/vmscan touch this.

Thanks,
-Kame


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