[Devel] Re: [PATCH] fix bad behavior in use_hierarchy file

[Michal Hocko]

[Adding Ying to CC - they are using hierarchies AFAIU in their workloads]

On Mon 25-06-12 13:49:08, Tejun Heo wrote:
[...]
> A bit of delta but is there any chance we can either deprecate
> .use_hierarhcy or at least make it global toggle instead of subtree
> thing?  

So what you are proposing is to have all subtrees of the root either
hierarchical or not, right?

> This seems needlessly complicated. :(

Toggle wouldn't help much I am afraid. We would still have to
distinguish (non)hierarchical cases. And I am not sure we can make
everything hierarchical easily. 
Most users (from my experience) ignored use_hierarchy for some reasons
and the end results might be really unexpected for them if they used
deeper subtrees (which might be needed due to combination with other
controller(s)).
-- 
Michal Hocko
SUSE Labs
SUSE LINUX s.r.o.
Lihovarska 1060/12
190 00 Praha 9    
Czech Republic