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SubjectRe: [mm] [PATCH 4/4] Memory cgroup hierarchy feature selector
On Sun, 02 Nov 2008 11:33:51 +0530
Balbir Singh <balbir@linux.vnet.ibm.com> wrote:

> KAMEZAWA Hiroyuki wrote:
> > On Sun, 02 Nov 2008 00:19:02 +0530
> > Balbir Singh <balbir@linux.vnet.ibm.com> wrote:
> >
> >> Don't enable multiple hierarchy support by default. This patch introduces
> >> a features element that can be set to enable the nested depth hierarchy
> >> feature. This feature can only be enabled when there is just one cgroup
> >> (the root cgroup).
> >>
> > Why the flag is for the whole system ?
> > flag-per-subtree is of no use ?
>
> Flag per subtree might not be useful, since we charge all the way up to root,
Ah, what I said is "How about enabling/disabling hierarhcy support per subtree ?"
Sorry for bad text.

like this.
- you can set hierarchy mode of a cgroup turned on/off when...
* you don't have any tasks under it && it doesn't have any child cgroup.

Thanks,
-Kame



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