Hi Tejun, On 2014/5/10 5:31, Tejun Heo wrote: > Hello, > > Currently, while csses (cgroup_subsys_states) have ->parent linkage > too, only cgroups form full tree through their ->children and > ->sibling fields and css iterations naturally is implemented by > iterating cgroups and then dereferencing the css for the specified > subsystem. > > There are now use cases where controllers need to iterate through > csses regardless of their online state as long as they have positive
What use cases are we talking about here? > reference. This can't easily be achieved by iterating cgroups because > its css pointer array needs to be cleared on offline and there may be > multiple dying csses for a cgroup for the same subsystem and there's > only one pointer per cgroup-subsystem pair. > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
