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

[Andrew Morton]

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?

Ditto ksmd.