Re: [PATCHSET] perf, cgroup: implement hierarchy support for perf_event controller

[Li Zefan <lizefan-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>]

On 2013/4/9 10:23, Tejun Heo wrote:
> perf_event cgroup controller is one of the remaining few with broken
> hierarchy support.  It turns out it's pretty easy to implement - the
> only thing necessary is making perf_cgroup_match() return %true also
> when the cgroup of the current task is a descendant of the event's
> cgroup.  This patchset implements cgroup_is_descendant() and uses it
> to implement hierarchy support in perf_event controller.
> 
> This patchset contains the following three patches.
> 
>  0001-cgroup-make-sure-parent-won-t-be-destroyed-before-it.patch
>  0002-cgroup-implement-cgroup_is_descendant.patch
>  0003-perf-make-perf_event-cgroup-hierarchical.patch
> 
> The patches are also available in the following git branch, which is
> based on top of cgroup/for-3.10.  It's currently based on top of
> cgroup/for-3.10 as the first patch causes non-trivial conflict with it
> otherwise, which is not difficult to resolve but still nice to avoid
> anyway.
> 
> Li, Michal, I picked the first two patches from Li's memcg patchset.
> Can we push the first two through cgroup/for-3.10 and put the rest in
> -mm?
> 

Sure. Andrew asked me to resend the memcg patchset when we are at 3.10-rc1,
because 3.9-rc6 is a bit too late and he's too busy.

> Ingo, how should these be routed?