[PATCH 6/8] Lets ss->can_attach and ss->attach do whole threadgroups at a time

[Li Zefan]

07:58, Paul Menage wrote:
> From: Ben Blum <bblum at google.com>
> 
> 
> Lets ss->can_attach and ss->attach do whole threadgroups at a time
> 
> This patch alters the ss->can_attach and ss->attach functions to be able to
> deal with a whole threadgroup at a time, for use in cgroup_attach_proc. (This
> is a pre-patch to cgroup-procs-writable.patch.)
> 
> Currently, new mode of the attach function can only tell the subsystem about
> the old cgroup of the threadgroup leader. No subsystem currently needs that
> information for each thread that's being moved, but if one were to be added
> (for example, one that counts tasks within a group) this bit would need to be
> reworked a bit to tell the subsystem the right information.
> 
> Signed-off-by: Ben Blum <bblum at google.com>
> Signed-off-by: Paul Menage <menage at google.com>
> 

Acked-by: Li Zefan <lizf at cn.fujitsu.com>