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? Ingo, how should these be routed? git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git perf_event-hierarchy-support diffstat follows, thanks. include/linux/cgroup.h | 1 + kernel/cgroup.c | 30 ++++++++++++++++++++++++++++++ kernel/events/core.c | 24 ++++++++++++++++-------- 3 files changed, 47 insertions(+), 8 deletions(-) -- tejun -- To unsubscribe from this list: send the line "unsubscribe cgroups" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
