Re: [PATCH 6/8] cgroup: remove cgroup->name

[Peter Zijlstra]

On Tue, Jan 28, 2014 at 06:59:43PM -0500, Tejun Heo wrote:
> cgroup->name handling became quite complicated over time involving
> dedicated struct cgroup_name for RCU protection.  Now that cgroup is
> on kernfs, we can drop all of it and simply use kernfs_name/path() and
> friends.  Replace cgroup->name and all related code with kernfs
> name/path constructs.
> 
> * Reimplement cgroup_name() and cgroup_path() as thin wrappers on top
>   of kernfs counterparts, which involves semantic changes.
>   pr_cont_cgroup_name() and pr_cont_cgroup_path() added.
> 
> * cgroup->name handling dropped from cgroup_rename().
> 
> * All users of cgroup_name/path() updated to the new semantics.  Users
>   which were formatting the string just to printk them are converted
>   to use pr_cont_cgroup_name/path() instead, which simplifies things
>   quite a bit.  As cgroup_name() no longer requires RCU read lock
>   around it, RCU lockings which were protecting only cgroup_name() are
>   removed.
> 
> Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>
> Cc: Li Zefan <lizefan@xxxxxxxxxx>
> Cc: Ingo Molnar <mingo@xxxxxxxxxx>
> Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
> Cc: Michal Hocko <mhocko@xxxxxxx>
> Cc: Balbir Singh <bsingharora@xxxxxxxxx>
> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>

Acked-by: Peter Zijlstra <peterz@xxxxxxxxxxxxx>

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