Re: [PATCH v3] mm/khugepaged: sched to numa node when collapse huge page

[maobibo]

在 2022/5/13 09:49, Andrew Morton 写道:
> On Fri, 13 May 2022 09:29:07 +0800 maobibo <maobibo@xxxxxxxxxxx> wrote:
> 
>>
>>
>>>> and/or changelogging.
>>> Sorry for the late response, the mail is filtered and I did not notice that. The result is not so obvious after bandwidth is improved between nodes, it is only about 1% improvement for specint2006 for 32 core on my box.
>>>
>>> Now I do not see negative effective about this patch unless user wants to keep some cores separated from khugepaged daemon process.
>>
>> Can we provide an extra parameter to let khugepaged daemon scheduling binded to node or freely? If can, I will provide updated patch.
> 
> It has always surprised me that we have a single khugepaged thread.  If
> we had a thread per node, you'd be all fixed up, yes?
yes, it will solve this issue if there is a thread per node, also it can speed up huge page scanning. It should be useful for some workloads in short time like specint.
> 
> Ditto ksmd.