Re: [PATCH] patch-slab-split-03-tail

[Andrew Morton]

"Martin J. Bligh" wrote:
> 
> > Run that by me again?  So we're saying "if we just freed an
> > object from this page then make this page be the *last* page
> > which is eligible for new allocations"?  Under the assumption
> > that other objects in that same page are about to be freed
> > up as well?
> >
> > Makes sense.  It would be nice to get this confirmed in
> > targetted testing ;)
> 
> Just doing my normal boring kernel compile suggest Manfred's
> last big rollup performs exactly the same as without it. Not
> sure if that's any help or not ....
> 

Well.  This patch is supposed to decrease internal fragmentation.
We need to prove that theory.  An appropriate test would be:

- boot with `mem=48m'
- untar kernel
- build kernel
- capture /proc/slabinfo

- apply patch

- repeat

- compare and explain.

I know what your reboot times are like ;)  I'll do it.