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SubjectRe: [patch] cgroups: disallow attaching kthreadd
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On Wed, 2012-04-04 at 23:07 -0700, David Rientjes wrote:
> On Thu, 5 Apr 2012, Mike Galbraith wrote:
>
> > I submitted that, and it didn't fly. I like the generic exclusion
> > better, so I submit that for consideration.
> >
>
> [+akpm]
>
> The last time we went through this, it was left after Andrew had fixed it
> up when the cpusets version was merged in -mm without any disagreement
> from Peter who was cc'd and that version was acked both by myself and Paul
> Menage at https://lkml.org/lkml/2011/12/14/402. Andrew dropped it and
> asked for a repost since there was some on-going scheduler work going on
> in linux-next that caused that version not to apply. No follow-up was
> ever offered.
>
> Why have we now gone in a completely different direction again?

I really absolutely hate the cpuset only feature. The whole point of
kthreadd's existence is to provide a clean environment to spawn kthreads
from. Adding kthreadd to controllers violates this premise.

New and fresh kthreads should always get a bare minimum state, this
includes not being part of any particular cgroup.




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