Re: [RFC/RFT PATCH v3] sched: automated per tty task groups

[Paul Menage]

On Tue, Nov 16, 2010 at 11:45 AM, Linus Torvalds
<torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
>
> In a system daemon? Good luck with that. It's a nightmare. Maybe you
> could just poll all the cgroups, and try to remove them once a minute,
> and if they are empty it works. Or something like that. But what a
> hacky thing it would be.

There's an existing cgroups API - release_agent and notify_on_release
- whereby the kernel will spawn a userspace command once a given
cgroup is completely empty. It's intended for pretty much exactly this
purpose.

Paul
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