Messages in this thread | | | Date | Mon, 14 Sep 2015 16:49:07 -0400 | From | Tejun Heo <> | Subject | Re: [PATCH 2/5] cgroup, memcg, cpuset: implement cgroup_taskset_for_each_leader() |
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On Fri, Sep 11, 2015 at 03:00:19PM -0400, Tejun Heo wrote: > It wasn't explicitly documented but, when a process is being migrated, > cpuset and memcg depend on cgroup_taskset_first() returning the > threadgroup leader; however, this approach is somewhat ghetto and > would no longer work for the planned multi-process migration. > > This patch introduces explicit cgroup_taskset_for_each_leader() which > iterates over only the threadgroup leaders and replaces > cgroup_taskset_first() usages for accessing the leader with it. > > This prepares both memcg and cpuset for multi-process migration. This > patch also updates the documentation for cgroup_taskset_for_each() to > clarify the iteration rules and removes comments mentioning task > ordering in tasksets. > > v2: A previous patch which added threadgroup leader test was dropped. > Patch updated accordingly. > > Signed-off-by: Tejun Heo <tj@kernel.org> > Acked-by: Zefan Li <lizefan@huawei.com> > Cc: Johannes Weiner <hannes@cmpxchg.org> > Cc: Michal Hocko <mhocko@suse.cz>
Michal, if you're okay with this patch, I'll apply the patchset in cgroup/for-4.4.
Thanks.
-- tejun
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