Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters

Matt Helsley
2006-08-18T23:02:00Z

On Fri, 2006-08-18 at 11:53 -0700, Chandra Seetharaman wrote:
> On Fri, 2006-08-18 at 14:36 +0400, Kirill Korotaev wrote:

<snip>

> > 2. as was discussed with a number of people on summit we agreed that
> > it maybe more flexible to not merge all resource types into one set.
> > CPU scheduler is usefull by itself w/o memory management.
> > the same for disk I/O bandwidht which is controlled in CFQ by
> > a separate system call.
> >
> > it is also more logical to have them separate since they
> > operate in different terms. For example, for CPU it is
> > shares which are relative units, while for memory it is
> > absolute units in bytes.
>
> We don't have to tie the units with the number. We can leave it to be
> sorted out between the user and the controller writer.

Yes. The user specifies a ratio of the parent group's resources and the
controller maps that unitless number into appropriate units for the
resource.

> Current implementation of resource groups does that.

IMHO this also better facilitates hotplug addition/removal of resources,
arbitrary levels of groups, and containers.

<snip>

Cheers,
-Matt Helsley