Re: [ckrm-tech] [RFC] [PATCH 00/12] CKRM after a major overhaul

KUROSAWA Takahiro
2006-04-24T05:41:05Z

On Mon, 24 Apr 2006 08:39:52 +0400
Kirill Korotaev <dev@openvz.org> wrote:

> >>>> pzone based memory controller:
> >>>> http://marc.theaimsgroup.com/?l=ckrm-tech&m=113867467006531&w=2
> >>> From a super-quick scan that looks saner. Is it effective? Is this the
> >>> way you're planning on proceeding?
> >> Yes, it is effective, and the reclamation is O(1) too. It has couple of
> >> problems by design, (1) doesn't handle shared pages and (2) doesn't
> >> provide support for both min_shares and max_shares.
> >
> > Right. I wanted to show proof-of-cencept of the pzone based controller
> > and implemented minimal features necessary as the memory controller.
> > So, the pzone based controller still needs development and some cleanup.
> Just out of curiosity, how it was meassured that it is effective?

I don't have any benchmark numbers yet, so I can't explain the
effectiveness with numbers. I've been looking for the way to
measure the cost of pzones correctly, but I've not found it out yet.

> How does it work when there is a global memory shortage in the system?

I guess you are referring to the situation that global memory is running
out but there are free pages in pzones. These free pages in pzones are
handled as reserved for pzone users and not used even in global memory
shortage.

Thanks,
--
KUROSAWA, Takahiro