Re: [PATCH cgroup/for-3.11 1/3] cgroup: mark "tasks" cgroup file as insane

[Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>]

Hello, Daniel.

On Fri, Jun 07, 2013 at 10:30:50AM +0100, Daniel P. Berrange wrote:
> > Uhm. So I don't think we will support two ways to set this up for long
> > in systemd (if at all). And even if we did, the distributions would pick
> > one or the other as default, and if you are unlucky, then you couldn't
> > run libvirt on it without reconfiguration and rebooting to get the other
> > cgroup setup logic...
> 
> Yep, that's exactly what concerns me. If systemd introduced the option

I don't think you two are speaking about the same problem.  Lennart is
saying that backward compat option won't stay for long and you're
worrying about the method to enable compatibility mode.

> for a new style setup, then it would almost certainly be adopted by
> default by Fedora (otherwise there's no point adding it). At which
> point libvirt is doomed. We can't require people to reconfigure systemd
> and reboot to use virt.

Yeah, it's cumbersome, but if it's pressing we can make the release of
controllers from unified hierarchy dynamic I suppose.  I'll think more
about it.

Thanks.

-- 
tejun