Re: Cache Allocation Technology Design

Peter Zijlstra
2014-10-30T13:19:16Z

On Thu, Oct 30, 2014 at 08:44:40AM -0400, Tejun Heo wrote:
> On Thu, Oct 30, 2014 at 08:14:24AM +0100, Peter Zijlstra wrote:
> > On Thu, Oct 30, 2014 at 08:07:25AM +0100, Peter Zijlstra wrote:
> > > > and always allow execution of member tasks.
> >
> > This too btw is not strictly speaking possible for all controllers. Most
> > all sched controllers live by the grace of forcing tasks not to run at
> > times (eg. the bandwidth controls), falsifying the 'always'.
>
> Oh sure, the a task just has to run in a foreseeable future, or
> rather, a task must not be blocked indefinitely requiring userland
> intervention to become executable again.

Like the freezer cgroup you mean? ;-)