Re: Cache Allocation Technology Design

[Vikas Shivappa]

On Wed, 29 Oct 2014, Peter Zijlstra wrote:

> On Wed, Oct 29, 2014 at 04:32:04PM +0000, Auld, Will wrote:
> > I maybe repeating what Peter has just said but for elements in the
> > hierarchy where the mask is the same as its parents mask there is no
> > need for a separate CLOS even in the case where there are tasks in the
> > group. So we can inherit the CLOS of the parent until which time both
> > the mask is different than the parent and there are tasks in the
> > group.
>
> I did not state that explicitly, but I did think about that. We could
> still wait to allocate a CLOS until at least one such group acquires a
> task.

Was wondering if it is a requirement of the 'full hierarchy' for the 
child to inherit the cbm of parent ? .
Alternately we can allocate the CLOSid when a cgroup 
is created and have an empty cbm - but dont let the tasks to be added 
unless the user assigns a cbm. Cpuset does something similar where 
its necessary to set the cpu mask(empty by default) of a cgroup before adding 
tasks.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/