On Thu, Aug 01, 2013 at 05:49:53PM -0400, Tejun Heo wrote: > cgroup is currently in the process of transitioning to using css > (cgroup_subsys_state) as the primary handle instead of cgroup in > subsystem API. For hierarchy iterators, this is beneficial because > > * In most cases, css is the only thing subsystems care about anyway. > > * On the planned unified hierarchy, iterations for different > subsystems will need to skip over different subtrees of the > hierarchy depending on which subsystems are enabled on each cgroup. > Passing around css makes it unnecessary to explicitly specify the > subsystem in question as css is intersection between cgroup and > subsystem > > * For the planned unified hierarchy, css's would need to be created > and destroyed dynamically independent from cgroup hierarchy. Having > cgroup core manage css iteration makes enforcing deref rules a lot > easier. > > Most subsystem conversions are straight-forward. Noteworthy changes > are > > * blkio: cgroup_to_blkcg() is no longer used. Removed. > > * freezer: cgroup_freezer() is no longer used. Removed. > > * devices: cgroup_to_devcgroup() is no longer used. Removed. > > Signed-off-by: Tejun Heo <tj@xxxxxxxxxx> > Cc: Li Zefan <lizefan@xxxxxxxxxx> > Cc: Johannes Weiner <hannes@xxxxxxxxxxx> > Cc: Michal Hocko <mhocko@xxxxxxx> > Cc: Balbir Singh <bsingharora@xxxxxxxxx> > Cc: Aristeu Rozanski <aris@xxxxxxxxxx> > Cc: Matt Helsley <matthltc@xxxxxxxxxx> > Cc: Vivek Goyal <vgoyal@xxxxxxxxxx> > Cc: Jens Axboe <axboe@xxxxxxxxx> > --- > block/blk-cgroup.c | 8 +-- > block/blk-cgroup.h | 25 ++++----- > block/blk-throttle.c | 8 +-- Block bits look good to me. Acked-by: Vivek Goyal <vgoyal@xxxxxxxxxx> Vivek -- 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
