Re: [PATCH][RFC] slub: increasing order reduces memory usage of some key caches

[Christoph Lameter <cl@linux-foundation.org>]

Richard Kennedy wrote:

>> We could rethink the automatic slab size configuration. Maybe add a
>> memory size based component? If we have more than 512M then double
>> slub_min_objects?
> 
> That should help :)  
> 
> I just wonder if it's too simple though? There's such a wide range of
> hardware configurations & workloads it could be difficult to pick a
> one-size-fits-all solution.
> 
> I wonder if something more dynamic is needed ?

If you have the time to work on it then go ahead.

> Slub is already smart enough to handle variable order slabs, so could it
> pick the order based on the rate of growth of a cache & the free memory
> available?
> But tuning such an algorithm might be fun! ;)

Sure it could do that. We just need a smart person that has fun tuning such an algorithm until its mature for upstream inclusion.


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