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Re: [PATCH] fix bad behavior in use_hierarchy file [message #46969 is a reply to message #46934]

Tue, 26 June 2012 07:56

Michal Hocko
Messages: 109
Registered: December 2011

Senior Member

[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

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[Message index]

		[PATCH] fix bad behavior in use_hierarchy file By: Glauber Costa on Mon, 25 June 2012 09:21
		Re: [PATCH] fix bad behavior in use_hierarchy file By: KAMEZAWA Hiroyuki on Mon, 25 June 2012 09:54
		Re: [PATCH] fix bad behavior in use_hierarchy file By: Michal Hocko on Mon, 25 June 2012 12:08
		Re: [PATCH] fix bad behavior in use_hierarchy file By: Glauber Costa on Mon, 25 June 2012 12:11
		Re: [PATCH] fix bad behavior in use_hierarchy file By: Michal Hocko on Mon, 25 June 2012 12:49
		Re: [PATCH] fix bad behavior in use_hierarchy file By: Glauber Costa on Mon, 25 June 2012 12:55
		Re: [PATCH] fix bad behavior in use_hierarchy file By: Michal Hocko on Mon, 25 June 2012 13:22
		Re: [PATCH] fix bad behavior in use_hierarchy file By: Tejun Heo on Mon, 25 June 2012 20:49
		Re: [PATCH] fix bad behavior in use_hierarchy file By: Glauber Costa on Mon, 25 June 2012 22:26
		Re: [PATCH] fix bad behavior in use_hierarchy file By: Michal Hocko on Tue, 26 June 2012 07:56
		Re: [PATCH] fix bad behavior in use_hierarchy file By: Glauber Costa on Tue, 26 June 2012 10:31
		Re: [PATCH] fix bad behavior in use_hierarchy file By: Michal Hocko on Tue, 26 June 2012 11:10
		Re: [PATCH] fix bad behavior in use_hierarchy file By: Glauber Costa on Tue, 26 June 2012 11:12
		Re: [PATCH] fix bad behavior in use_hierarchy file By: Tejun Heo on Tue, 26 June 2012 17:55
		Re: [PATCH] fix bad behavior in use_hierarchy file By: Ying Han on Mon, 23 July 2012 17:22

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