> > it reminds me an old patch in my local tree.  (attached)
> > i suspended it because i don't think tuning page balancing etc makes
> > much sense without fixing PR/27030.
> 
> for folks reading along, PR 27030 says:
> 
>         when doing pageout, uvm don't care about pages in kernel_object.
>         while they're counted as anon, the most of them are wired and
>         can't be paged out.  it imposes unfair penalty upon other anon pages,
>         and make pagedaemon unnecessarily busy.
> 
> 
> this is what the yamt-km branch is all about, right?

yes.

YAMAMOTO Takashi