Hello,
On Wed, Dec 02, 2020 at 09:02:11AM +0100, Peter Zijlstra wrote:
> > the user might only want subsets of {B, C, D, E} to share. For
> > instance, the user might only want {B,C} and {D, E} to share. One way
> > to solve this would be to allow the user to write the group cookie
> > directly. However, this interface would need to be restricted to
> > privileged users, since otherwise the cookie could be configured to
> > share with any arbitrary cgroup. The purpose of the 'color' field is
> > to expose a portion of the cookie that can be modified by a
> > non-privileged user in order to achieve this sharing goal.
> >
> > If this doesn't seem like a useful case, I'm happy to drop this patch
> > from the series to unblock it.
>
> Well, the traditional cgroup way of doing that would be to:
>
> A
> / \
> T1 T2
> / \
> B C
>
> And tag T1 if you want B,C to share.
>
> So me the color thing reads like an end-run around the cgroup hierarchy.
+1
and please cc me on cgroup related changes.
Thanks.
--
tejun
