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Re: [ckrm-tech] [RFC] Resource Management - Infrastructure choices [message #7961 is a reply to message #7957] Wed, 01 November 2006 08:01 Go to previous messageGo to previous message
Pavel Emelianov is currently offline  Pavel Emelianov
Messages: 1149
Registered: September 2006
Senior Member
[snip]

>> 2. Having configfs as the only interface doesn't alow
>> people having resource controll facility w/o configfs.
>> Resource controller must not depend on any "feature".
>
> One flexibility configfs (and any fs-based interface) offers is, as Matt
> had pointed out sometime back, the ability to delage management of a
> sub-tree to a particular user (without requiring root permission).
>
> For ex:
>
> /
> |
> -----------------
> | |
> vatsa (70%) linux (20%)
> |
> ----------------------------------
> | | |
> browser (10%) compile (50%) editor (10%)
>
> In this, group 'vatsa' has been alloted 70% share of cpu. Also user
> 'vatsa' has been given permissions to manage this share as he wants. If
> the cpu controller supports hierarchy, user 'vatsa' can create further
> sub-groups (browser, compile ..etc) -without- requiring root access.

I can do the same using bcctl tool and sudo :)

> Also it is convenient to manipulate resource hierarchy/parameters thr a
> shell-script if it is fs-based.
>
>> 3. Configfs may be easily implemented later as an additional
>> interface. I propose the following solution:
>
> Ideally we should have one interface - either syscall or configfs - and
> not both.

Agree.

> Assuming your requirement of auto-deleting objects in configfs can be
> met thr' something similar to cpuset's notify_on_release, what other
> killer problem do you think configfs will pose?
>
>
>>> - Should we have different groupings for different resources?
>> This breaks the idea of groups isolation.
>
> Sorry dont get you here. Are you saying we should support different
> grouping for different controllers?

Not me, but other people in this thread.

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